Image credits · ⁨图片署名⁩

Diagrams in our handouts are drawn by us and need no credit. The images below are reused from the web under licences that permit it — each is listed with its author, licence and source. · ⁨讲义中的图表由我们制作，无需署名。以下图片经许可从网络复用——每张均标注作者、授权及来源。⁩

← Know · ⁨掌握⁩

A-Level Biology · ⁨A-Level 生物⁩

01 · 细胞结构

Animal cell structure

Mariana Ruiz (LadyofHats) · Public domain · Source · ⁨来源⁩
Plant cell structure

Mariana Ruiz (LadyofHats) · Public domain · Source · ⁨来源⁩
Average prokaryote cell

Mariana Ruiz (LadyofHats) · Public domain · Source · ⁨来源⁩
Enterobacteria phage T2 transmission electron micrograph

SnaxMikn · CC BY-SA 4.0 · Source · ⁨来源⁩

02 · 生物分子

Benedict's test for Sugars

Thebiologyprimer · CC0 · Source · ⁨来源⁩
Kartoffel-Stärkekörner

Quant8 · CC BY-SA 4.0 · Source · ⁨来源⁩
1GZX Haemoglobin

Zephyris at English Wikipedia · CC BY-SA 3.0 · Source · ⁨来源⁩

03 · 酶

Plastic spoon n Laundry detergent n Washing powder in white

Lebacno · CC BY-SA 3.0 · Source · ⁨来源⁩
yeast

David Blaikie · CC BY 2.0 · Source · ⁨来源⁩

04 · 细胞膜与物质运输

SEM blood cells

Bruce Wetzel (photographer). Harry Schaefer (photographer) · Public domain · Source · ⁨来源⁩
Demonstration of osmosis using a potato osmometer

Knowledge genome · CC BY-SA 4.0 · Source · ⁨来源⁩

05 · 有丝分裂细胞周期

Onion skin mitosis (20x)

UAF Center for Distance Education · CC BY 2.0 · Source · ⁨来源⁩
Mitosis in Onion Root various stages (Metaphase)

Natalierussell77 · CC BY-SA 4.0 · Source · ⁨来源⁩

06 · 核酸与蛋白质合成

Space-filling model of the DNA double helix

Ude · Public domain · Source · ⁨来源⁩
DNA Extraction

Joo Nath · CC BY-SA 4.0 · Source · ⁨来源⁩
DNA Double Helix by NHGRI

National Human Genome Research Institute · Public domain · Source · ⁨来源⁩

07 · 植物体内的运输

Vascular bundle in a young sunflower stem

Berkshire Community College Bioscience Image Library · CC0 · Source · ⁨来源⁩
Growth Rings tree rings 01

Vijayanrajapuram · CC BY-SA 4.0 · Source · ⁨来源⁩

08 · 哺乳动物体内的运输

Diagram of the human heart

Wapcaplet (Eric Pierce) · CC BY-SA 3.0 · Source · ⁨来源⁩
Human blood smear

Keith Chambers · CC BY-SA 3.0 · Source · ⁨来源⁩

09 · 气体交换

Normal lung tissue

Yale Rosen from USA · CC BY-SA 2.0 · Source · ⁨来源⁩
Human Lungs (NIH BioArt 231 - 630892)

Courtesy of NIAID Ryan Kissinger · Public domain · Source · ⁨来源⁩

10 · 传染病

Acid-fast bacilli of Mycobacterium tuberculosis

Ajay Kumar Chaurasiya · CC0 1.0 · Source · ⁨来源⁩
Plasmodium falciparum parasite in blood

MichaelZahniser · Public domain · Source · ⁨来源⁩
Antibiotic sensitivity test

Dr Graham Beards · CC BY-SA 4.0 · Source · ⁨来源⁩

11 · 免疫

A neutrophil engulfing bacteria

Volker Brinkmann (NIAID) · CC BY-SA 3.0 · Source · ⁨来源⁩
Normal Adult Blood Smear

Keith Chambers · CC BY-SA 3.0 · Source · ⁨来源⁩
Urine Pregnancy Test -Positive

Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source · ⁨来源⁩
Antibiotic sensitivity test

Dr Graham Beards · CC BY-SA 4.0 · Source · ⁨来源⁩

12 · 能量与呼吸作用

800metresOlympicTrials2020

jenaragon94 · CC BY 2.0 · Source · ⁨来源⁩
Mitochondria, mammalian lung - TEM

Louisa Howard · Public domain · Source · ⁨来源⁩
Monocot Root Aerenchyma in Acorus (35399382813)

Berkshire Community College Bioscience Image Library · CC0 · Source · ⁨来源⁩

13 · 光合作用

Green leaves (7914624332)

Moyan Brenn from Italy · CC BY 2.0 · Source · ⁨来源⁩
Cloroplasti Elodea

Cimice50 · CC BY-SA 4.0 · Source · ⁨来源⁩

14 · 稳态

(20250417) Blood glucose meter 04

Roy Zuo · CC BY-SA 4.0 · Source · ⁨来源⁩
Sweating for stunning scenery 130719-Z-NO327-280

Spc. Tyler Meister · Public domain · Source · ⁨来源⁩

15 · 调节与协调

Stained neurones under the microscope

Tulemo · CC BY-SA 4.0 · Source · ⁨来源⁩
Computed tomography of human brain - large

Department of Radiology, Uppsala University Hospital. Uploaded by Mikael Häggström · CC0 · Source · ⁨来源⁩
Venus Flytrap showing trigger hairs

Noah Elhardt · CC BY-SA 2.5 · Source · ⁨来源⁩
Human skeletal muscle tissue 1 - TEM

Louisa Howard · Public domain · Source · ⁨来源⁩

16 · 遗传

Human karyotype

National Cancer Institute · Public domain · Source · ⁨来源⁩
Human Egg (2722043681)

Ed Uthman from Houston, TX, USA · CC BY 2.0 · Source · ⁨来源⁩

17 · 选择与进化

Hardy-Weinberg formula card

eXercise project · CC0 · Source · ⁨来源⁩
Peppered moth forms

Martinowksy at Dutch Wikipedia (Original text: Maarten Sanne) · CC BY-SA 3.0 · Source · ⁨来源⁩
Cepaea nemoralis pair banded shells

· CC BY-SA 2.0 · Source · ⁨来源⁩

18 · 分类、生物多样性与保护

A coral reef on the Great Barrier Reef

Toby Hudson · CC BY-SA 3.0 · Source · ⁨来源⁩
Aerial image of Grand Prismatic Spring (view from the south)

Carsten Steger · CC BY-SA 4.0 · Source · ⁨来源⁩
Insect drawer Natural History Museum Rose Stainthorp 2010 (35900683461)

Natural History Museum: Coleoptera Section from South Kensingon, London, UK · CC BY 2.0 · Source · ⁨来源⁩

19 · 遗传技术

Agarose gel under UV

YTEDG72.k · CC BY 4.0 · Source · ⁨来源⁩
Thermal cycler for PCR

Juan Carlos Fonseca Mata · CC BY-SA 4.0 · Source · ⁨来源⁩
CSIRO ScienceImage 381 Genetically Modified Cotton vs Normal Cotton

Plant Industry, CSIRO · CC BY 3.0 · Source · ⁨来源⁩

vocab · Vocabulary trainer images · ⁨词汇训练器图片⁩

File:Heart numlabels.svg

Wapcaplet · CC BY-SA 3.0 · Source · ⁨来源⁩
File:ArteryVeinCS.jpg

FishtailBob · CC BY-SA 4.0 · Source · ⁨来源⁩
File:PBB Protein ATP synthase image.jpg

www.pdb.org · Public domain · Source · ⁨来源⁩
File:Heart numlabels.svg

Wapcaplet · CC BY-SA 3.0 · Source · ⁨来源⁩
File:E coli at 10000x, original.jpg

Photo by Eric Erbe, digital colorization by Christopher Pooley, both of USDA, ARS, EMU · Public domain · Source · ⁨来源⁩
File:Tramlines in a barley crop - geograph.org.uk - 1306062.jpg

Evelyn Simak · CC BY-SA 2.0 · Source · ⁨来源⁩
File:Nephron simple numbers.svg

Jmarchn · CC BY-SA 3.0 · Source · ⁨来源⁩
File:Respiratory system complete en.svg

LadyofHats, Jmarchn · Public domain · Source · ⁨来源⁩
File:Pathology of the lung (cancer).jpg

Unknown photographer · Public domain · Source · ⁨来源⁩
File:Blood vessels-en.svg

Kelvinsong · CC BY-SA 3.0 · Source · ⁨来源⁩
File:The structure of the immature HIV-1 capsid in intact virus particles.png

MarinaVladivostok · CC0 · Source · ⁨来源⁩
File:Histology of articular cartilage zones.jpg

Catherine A. Bautista, Hee Jun Park, Courtney M. Mazur, Roy K. Aaron, Bahar Bilgen · CC0 · Source · ⁨来源⁩
File:Chromosome Terminology.png

Christinelmiller · CC BY-SA 4.0 · Source · ⁨来源⁩
File:Chlorophyll a.svg

David Richfield · Public domain · Source · ⁨来源⁩
File:Paper chromatography in progress.jpg

Amitchell125 · CC BY-SA 4.0 · Source · ⁨来源⁩
File:Collagen (triple helix protein).jpg

Eric Hahn · CC BY-SA 4.0 · Source · ⁨来源⁩
File:Phloem Cells.jpg

Chippolito · CC BY-SA 3.0 · Source · ⁨来源⁩
File:Cotton boll maturing on Bobby Byrd's cotton plant in Hale County near Plainview, Texas. (24490395753).jpg

USDA NRCS Texas · Public domain · Source · ⁨来源⁩
File:DNA double helix horizontal.png

Jerome Walker · Public domain · Source · ⁨来源⁩
File:Kidney Glomerulus Cell Types.png

Artwork by Holly Fischer · CC BY 3.0 · Source · ⁨来源⁩
File:Glycogen structure.jpg

Mikael Häggström · CC0 · Source · ⁨来源⁩
File:Psuedostratified epithelium animated.gif

Laird Sheldahl · CC BY-SA 4.0 · Source · ⁨来源⁩
File:Endomembrane system diagram en.svg

Mariana Ruiz LadyofHats · Public domain · Source · ⁨来源⁩
File:Xenopus laevis nucleosome, Histone H3.3C (2) 1AOI.png

Luger K, Mäder AW, Richmond RK, Sargent DF, Richmond TJ · CC0 · Source · ⁨来源⁩
File:SEM Lymphocyte.jpg

Unknown photographer/artist (False color modifications made by myself--DO11.10) · Public domain · Source · ⁨来源⁩
File:Animal cell structure en.svg

LadyofHats (Mariana Ruiz) · Public domain · Source · ⁨来源⁩
File:Giemsa Stain Macrophage Illustration.png

Noah Smith · CC BY-SA 4.0 · Source · ⁨来源⁩
File:Microtubule structure esp.png

Wikimedia Commons: https://commons.wikimedia.org/wiki/File:Microtubule_structure.png · CC BY-SA 4.0 · Source · ⁨来源⁩
File:Villi & microvilli of small intestine.svg

BallenaBlanca · CC BY-SA 4.0 · Source · ⁨来源⁩
File:Animal mitochondrion diagram et.svg

LadyofHats, translated by ArtjomJemeljanovNERG · Public domain · Source · ⁨来源⁩
File:Monocytes, a type of white blood cell (Giemsa stained).jpg

Dr Graham Beards · CC BY-SA 3.0 · Source · ⁨来源⁩
File:Anopheles stephensi.jpeg

Jim Gathany · Public domain · Source · ⁨来源⁩
File:Complete neuron cell diagram en.svg

LadyofHats · Public domain · Source · ⁨来源⁩
File:Neuro Muscular Junction.png

Doctor Jana · CC BY 4.0 · Source · ⁨来源⁩
File:Neutrophil with anthrax copy.jpg

Volker Brinkmann · CC BY 2.5 · Source · ⁨来源⁩
File:Nucleus Nucleolus and chromatin of animal cell.png

Dan · CC BY-SA 3.0 · Source · ⁨来源⁩
File:Plasmodesmata en.svg

User:Zlir'a · CC0 · Source · ⁨来源⁩
File:Types of amoeboid movement.tif

Peter J M Van Haastert · CC BY 4.0 · Source · ⁨来源⁩
File:Ribosome structure including subunits and binding sites.png

LadyofHats · CC0 · Source · ⁨来源⁩
File:Monocot Root Epidermal Root Hair in Lilium (36045152715).jpg

Berkshire Community College Bioscience Image Library · CC0 · Source · ⁨来源⁩
File:Rough endoplasmic reticulum.JPG

Rlawson at English Wikibooks · CC BY-SA 3.0 · Source · ⁨来源⁩
File:Atlantic salmon fish.jpg

Timothy Knepp, U.S. Fish and Wildlife Service · Public domain · Source · ⁨来源⁩
File:Cardiac sarcomere tomogram.jpg

Davide Tamborrini, Zhexin Wang, Thorsten Wagner, Sebastian Tacke, Markus Stabrin, Michael Grange, Ay Lin Kho, Martin Rees, Pauline Bennett, Mathias Gautel, Stefan Raunser · CC BY 4.0 · Source · ⁨来源⁩
File:Neuron figure fr.png

Dominique222 · CC BY-SA 4.0 · Source · ⁨来源⁩
File:Phloem.jpg

Clematis · CC BY-SA 3.0 · Source · ⁨来源⁩
File:Reizleitungssystem 1.png

J. Heuser · CC BY 2.5 · Source · ⁨来源⁩
File:Chromosome Terminology.png

Christinelmiller · CC BY-SA 4.0 · Source · ⁨来源⁩
File:0313 Endoplasmic Reticulum c labeled.png

OpenStax · CC BY 3.0 · Source · ⁨来源⁩
File:Smooth muscle - histology.jpg

Juan Carlos Fonseca Mata · CC BY-SA 4.0 · Source · ⁨来源⁩
File:Soybean.USDA.jpg

· Public domain · Source · ⁨来源⁩
File:Prometaphase Mitosis Spindle apparatus Meiosis.jpg

Textured-Sears · CC0 · Source · ⁨来源⁩
File:Stratified squamous epithelium.png

Jmarchn · CC BY-SA 3.0 · Source · ⁨来源⁩
File:Microscope images of starch 3.png

Daniel Domene-López, Juan Carlos García-Quesada, Ignacio Martin-Gullon and Mercedes G. Montalbán · CC BY 4.0 · Source · ⁨来源⁩
File:Urtica dioica leaf cross section micrograph.zip.jpg

Mdantonio2005 · CC BY-SA 4.0 · Source · ⁨来源⁩
File:Skeletal striated muscle.jpg

Nephron · CC BY-SA 3.0 · Source · ⁨来源⁩
File:Taste bud esp.jpg

NEUROtiker · CC BY-SA 3.0 · Source · ⁨来源⁩
File:Telomere caps.gif

U.S. Department of Energy Human Genome Program · Public domain · Source · ⁨来源⁩
File:Chloroplast II.svg

Kelvinsong · CC BY 3.0 · Source · ⁨来源⁩
File:Plant cell structure-en.svg

LadyofHats · Public domain · Source · ⁨来源⁩
File:Mitral valve prolapse subtypes.svg

Y. Coinblatt · CC BY-SA 4.0 · Source · ⁨来源⁩
File:2102 Comparison of Artery and Vein.jpg

OpenStax College · CC BY 3.0 · Source · ⁨来源⁩
File:Inferior vena cava ultrasound.gif

Tinss · CC BY-SA 4.0 · Source · ⁨来源⁩
File:Heart numlabels.svg

Wapcaplet · CC BY-SA 3.0 · Source · ⁨来源⁩
File:Venus Flytrap showing trigger hairs.jpg

Noah Elhardt · CC BY-SA 2.5 · Source · ⁨来源⁩
File:Yeast cells in wet mount of culture.jpg

Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source · ⁨来源⁩

A-Level Business · ⁨A-Level 商业⁩

01 · 企业及其环境

Bonn, Post-Tower -- 2017 -- 2128 (bw)

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨来源⁩
Retail outlets, High Street - geograph.org.uk - 7644448

John Baker · CC BY-SA 2.0 · Source · ⁨来源⁩
Austin Texas food truck

Kurtkaiser · CC0 · Source · ⁨来源⁩

02 · 人力资源管理

Meeting British business representatives (5430620349)

Foreign and Commonwealth Office · OGL v1.0 · Source · ⁨来源⁩
Young Woman in an Interview

Amtec Photos · CC BY-SA 2.0 · Source · ⁨来源⁩

03 · 市场营销

Shibuya Crossing

Landry Miguel · CC BY-SA 4.0 · Source · ⁨来源⁩
Branded retail display

tophomedesign · CC BY-SA 2.0 · Source · ⁨来源⁩
Candy products displayed in a supermarket

Nielsoncaetanosalmeron · CC BY 4.0 · Source · ⁨来源⁩

04 · 运营管理

Assembly line

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨来源⁩
Daiwa Logistics Tosu Logistics Center

Peka · CC BY-SA 4.0 · Source · ⁨来源⁩
001 Car factory assembly line - Opel factory in Gliwice, Poland

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨来源⁩
FANUC 6-axis welding robots

Phasmatisnox · CC BY 3.0 · Source · ⁨来源⁩

05 · 财务与会计

Market centre in Tokyo stock exchange

ehnmark · CC BY 2.0 · Source · ⁨来源⁩
Exterior of a modern Wells Fargo bank branch in Athens, Georgia 01

Harrison Keely · CC BY 4.0 · Source · ⁨来源⁩
Euro Series Banknotes (2019)

PawełMM · CC BY-SA 3.0 · Source · ⁨来源⁩

06 · 企业及其环境（A Level）

McDonalds Golden Arches

Anthony92931 · CC BY-SA 3.0 · Source · ⁨来源⁩
Shipping containers at West Harbour in Jätkäsaari, Helsinki, Finland, 2008 October

Kari Hakli · CC BY-SA 4.0 · Source · ⁨来源⁩

07 · 人力资源管理（A Level）

Team collaborating around a whiteboard in a modern office

Vitaly Gariev · Unsplash License · Source · ⁨来源⁩

08 · 市场营销（A Level）

Times Square (23307389095)

Alex Liivet from Chester, United Kingdom · CC0 · Source · ⁨来源⁩
New World Supermarket During COVID-19 Pandemic

ProtoKiwi · CC BY-SA 4.0 · Source · ⁨来源⁩

09 · 运营管理（A Level）

Factory Automation Robotics Palettizing Bread

KUKA Roboter GmbH, Bachmann · Public domain · Source · ⁨来源⁩

10 · 财务与会计（A Level）

Financial statements analysis

kenteegardin · CC BY-SA 2.0 · Source · ⁨来源⁩
Trading floor of the New York Stock Exchange, New York City LCCN2011632435

Carol M. Highsmith · Public domain · Source · ⁨来源⁩

A-Level Chemistry · ⁨A-Level 化学⁩

01 · 原子结构

Scanning tunneling microscope (STM) 250 nm by 250 nm image of one-atom-thick silver islands grown on palladium (111) surface

Ponor · CC BY-SA 4.0 · Source · ⁨来源⁩
Emission spectrum-H

Merikanto, Adrignola · CC0 · Source · ⁨来源⁩

02 · 原子、分子与化学计量

Vaha KERN - PEJ 2200-2M - 01

El Carlos · CC BY 3.0 · Source · ⁨来源⁩
Acid and Base Titration

Kengksn · CC BY-SA 4.0 · Source · ⁨来源⁩

03 · 化学键

Halite (rock salt) crystal

Didier Descouens · CC BY-SA 4.0 · Source · ⁨来源⁩
Methane-3D-balls

· Public domain · Source · ⁨来源⁩

04 · 物质的状态

Steam-boiling green asparagus

W.carter · CC0 · Source · ⁨来源⁩
Quartz Crystal Cluster (2932215981)

Stephanie Clifford from Arlington, VA, USA · CC BY 2.0 · Source · ⁨来源⁩
Copper (29 Cu)

Hi-Res Images of Chemical Elements · CC BY 3.0 · Source · ⁨来源⁩
Octahedral diamond (Mir Kimberlite; Mirnyy, Siberia, Russia) 1 (25177430258)

James St. John · CC BY 2.0 · Source · ⁨来源⁩

05 · 化学能量学

Daiso instant cold pack 300g

photo: Qurren (talk) Taken with Canon PowerShot G9 X · CC BY-SA 4.0 · Source · ⁨来源⁩
GERMAN BUNSEN (6132104166)

Jason Woodhead · CC BY 2.0 · Source · ⁨来源⁩

06 · 电化学

AA VARTA battery-side PNr°0782

D-Kuru · CC BY-SA 4.0 · Source · ⁨来源⁩
Rust on iron

Laitr Keiows · CC BY-SA 3.0 · Source · ⁨来源⁩

07 · 平衡

Cobalt(II) chloride solutions

Leiem · CC BY-SA 4.0 · Source · ⁨来源⁩
Yara-Werk bei Tagesanbruch 2011

5snake5 · CC BY-SA 4.0 · Source · ⁨来源⁩

08 · 反应动力学

Catalytic converter (4293629922)

Oak Ridge National Laboratory · CC BY 2.0 · Source · ⁨来源⁩

09 · 元素周期表：化学周期性

Simple Periodic Table of Elements

SCB2024 · CC0 · Source · ⁨来源⁩

10 · 第2族

Magnesium ribbon burning

Capt. John Yossarian · CC BY-SA 3.0 · Source · ⁨来源⁩
Limestone Cliffs, Little Ormes Head - geograph.org.uk - 7808316

N Chadwick · CC BY-SA 2.0 · Source · ⁨来源⁩

11 · 第17族

Silver halide precipitates

Rrausch1974 · CC BY-SA 3.0 · Source · ⁨来源⁩
Bromine-ampoule

Jurii · CC BY 3.0 · Source · ⁨来源⁩
Liquid Pool Chlorine

Maksym Kozlenko · CC BY-SA 4.0 · Source · ⁨来源⁩

12 · 氮与硫

AerialViewPhotochemicalSmogMexicoCity 2

Creator:Fidel Gonzalez · CC BY-SA 3.0 · Source · ⁨来源⁩
Mossmorran chemical plant - geograph.org.uk - 5288385

M J Richardson · CC BY-SA 2.0 · Source · ⁨来源⁩

13 · AS Level 有机化学导论

Crude oil

Glasbruch2007 · CC BY-SA 3.0 · Source · ⁨来源⁩
1-Undecanol molecular model

RandomKatze · CC0 · Source · ⁨来源⁩

14 · 烃

Gas stove blue flames

Marina Burity from Santo André, Brazil · CC BY-SA 2.0 · Source · ⁨来源⁩
Anacortes Refinery 31911

Walter Siegmund (talk) · CC BY 2.5 · Source · ⁨来源⁩

15 · 卤素化合物

Lata de spray congelante

Nave do Conhecimento · CC0 · Source · ⁨来源⁩
reflux

Max1musmax · CC BY-SA 2.0 · Source · ⁨来源⁩
Rotační vakuová odparka

Milda 444 · CC BY-SA 4.0 · Source · ⁨来源⁩

16 · 羟基化合物

Fraktionierte Destillation - Laboratory Fractional distillation apparatus

Chemie-Verbände Baden-Württemberg · CC BY 2.0 · Source · ⁨来源⁩
Hand sanitizer in Bangkok in March 2020 - 1

Mx. Granger · CC0 · Source · ⁨来源⁩
Erlenmeyer TSB fermentation replicates

Luis Fernando Flores LAB · CC BY-SA 4.0 · Source · ⁨来源⁩

17 · 羰基化合物

Tollensprobe

Tmv23 · CC BY-SA 3.0 · Source · ⁨来源⁩
Nail polish remover

Kaushik Narasimhan · CC BY 2.0 · Source · ⁨来源⁩

18 · 羧酸及其衍生物

Synthetic vinegar bottles

Sgroey · CC BY-SA 4.0 · Source · ⁨来源⁩
Glass perfume bottle MET DP108895

This file was donated to Wikimedia Commons as part of a project by the Metropolitan Museum of Art. See the Image and Data Resources Open Access Policy · CC0 · Source · ⁨来源⁩

19 · 含氮化合物

Jana nylon stockings in packaging

Bevaringstenestene / Museumssenteret i Hordaland · CC BY-SA 4.0 · Source · ⁨来源⁩
2021-09-05 AsparnZaya Museum Färber

Robert Kropf · CC BY-SA 4.0 · Source · ⁨来源⁩

20 · 聚合

Polyethylene balls5

Lluis tgn · CC BY-SA 3.0 · Source · ⁨来源⁩
004 Beach pollution in Tenerife - Atlantic Ocean beach plastic garbage debris

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨来源⁩

21 · 有机合成

Anterone (cyproterone acetate) tablets in Australia, with three blister packs

BlankEclair · CC BY-SA 4.0 · Source · ⁨来源⁩
Pexeso dělička

Milda 444 · CC BY-SA 4.0 · Source · ⁨来源⁩

22 · 分析技术

BrukerDaltonics maXis1

Mike25 Michael Willett · Public domain · Source · ⁨来源⁩
FTIR spectrometer

Wang, F., Zhang, L., Zhang, X., Li, H. and Wu, S · CC BY 4.0 · Source · ⁨来源⁩

23 · 化学能量学

Daiso instant cold pack 300g

photo: Qurren (talk) Taken with Canon PowerShot G9 X · CC BY-SA 4.0 · Source · ⁨来源⁩
HALIT X NaCl Natriumchlorid WÜRFEL KUBUS 50P

Hans-Joachim Engelhardt · CC BY-SA 4.0 · Source · ⁨来源⁩

24 · 电化学

Hofmann'scher Wasserzersetzungsapparat - Deutsches Museum Verkehrszentrum

Mattes · CC BY-SA 3.0 · Source · ⁨来源⁩
Barrel Plating For Small Parts

Encik Tekateki · CC BY-SA 4.0 · Source · ⁨来源⁩

25 · 平衡

PH Test Strips

Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source · ⁨来源⁩
2015 Jaskinia Niedźwiedzia w Kletnie, szata naciekowa 26

Jacek Halicki · CC BY-SA 4.0 · Source · ⁨来源⁩

26 · 反应动力学

Catalysts

Shubhrapdil · CC BY-SA 4.0 · Source · ⁨来源⁩
Gas syringe

User:Geni · CC BY-SA 3.0 · Source · ⁨来源⁩

27 · 第2族

Drehrohrofen Rohrdorf

Schmidti · CC BY-SA 3.0 · Source · ⁨来源⁩
Idrossido di rame

Alvy16 · CC BY 4.0 · Source · ⁨来源⁩

28 · 过渡元素化学

Coloured-transition-metal-solutions

No machine-readable author provided. Benjah-bmm27 assumed (based on copyright claims) · Public domain · Source · ⁨来源⁩
Ruby crystal 1

W.carter · CC BY 4.0 · Source · ⁨来源⁩

30 · 烃

White coloured mothball (naphthalene ball) 20230315 180901

Wiki Farazi · CC0 · Source · ⁨来源⁩

31 · 卤素化合物

SPRAYING PESTICIDES - NARA - 544246 (cropped)

John Messina · Public domain · Source · ⁨来源⁩

32 · 羟基化合物

Bar of carbolic soap

SamBlob · CC BY-SA 3.0 · Source · ⁨来源⁩
Phenol substance photo

Rillke · CC BY-SA 3.0 · Source · ⁨来源⁩

33 · 羧酸及其衍生物

Lemon - whole and split

Ivar Leidus · CC BY-SA 4.0 · Source · ⁨来源⁩
Regular strength enteric coated aspirin tablets

Ragesoss · CC BY-SA 4.0 · Source · ⁨来源⁩

34 · 含氮化合物

Methyl-orange-sample

Ben Mills · Public domain · Source · ⁨来源⁩
Paracetamol Tablets BP 500mg

themostinept · CC BY-SA 2.0 · Source · ⁨来源⁩

35 · 聚合

Nailoni süntees 2

Thctamm · CC BY-SA 3.0 · Source · ⁨来源⁩
Bales of PET bottles closeup

Grendelkhan · CC BY-SA 4.0 · Source · ⁨来源⁩

37 · 分析技术

Bruker 300 MHz NMR Spectrometer

Lihan Yao · CC BY 2.0 · Source · ⁨来源⁩
Thin layer Chromatographic Plate Under 365nm UV light

Ikramul Hasan Imran · CC BY 4.0 · Source · ⁨来源⁩

A-Level Computer Science · ⁨A-Level 计算机科学⁩

01 · 信息表示

Single-digit seven-segment LED display

The Pi Hut · Product image · Source · ⁨来源⁩
Chinese Suanpan Abacus

Felix Winkelnkemper · CC BY-SA 4.0 · Source · ⁨来源⁩

02 · 通信

TP-Link TL-SG105 5-port gigabit switch

TP-Link · Product image · Source · ⁨来源⁩
Cat6 Ethernet cable with RJ-45 plugs

Cable Matters · Product image · Source · ⁨来源⁩

03 · 硬件

Opened hard disk drive

Zzubnik · Public domain · Source · ⁨来源⁩
Inside an SSD

Michael Bemmerl · CC BY 3.0 de · Source · ⁨来源⁩
Computer monitor

Dell · Product image · Source · ⁨来源⁩
Wireless mouse

Logitech · Product image · Source · ⁨来源⁩
Computer keyboard

Logitech · Product image · Source · ⁨来源⁩
DDR5 RAM module

Corsair · Product image · Source · ⁨来源⁩
Epson Perfection flatbed scanner

Epson · Product image · Source · ⁨来源⁩
Laser printer

Brother · Product image · Source · ⁨来源⁩
FDM 3D printer

Creality · Product image · Source · ⁨来源⁩
USB microphone

Logitech · Product image · Source · ⁨来源⁩
Stepper motor

Adafruit · Product image · Source · ⁨来源⁩
External optical disc drive

ASUS · Product image · Source · ⁨来源⁩
Meta Quest 3 VR headset

Meta · Product image · Source · ⁨来源⁩
Thermistor

SparkFun · Product image · Source · ⁨来源⁩
touchscreen

Rawpixel Ltd · CC0 · Source · ⁨来源⁩
EPROM Chip

WestonChants · CC BY-SA 4.0 · Source · ⁨来源⁩
Garmin Forerunner 55

Melyanac · CC0 · Source · ⁨来源⁩

04 · 处理器基础

CPU chip

Eric Gaba (Sting - fr:Sting) · CC BY-SA 3.0 · Source · ⁨来源⁩
CPU socket

Smial (talk) · FAL · Source · ⁨来源⁩
Amstrad VSC386SXD V2.01

Mister rf · CC BY-SA 4.0 · Source · ⁨来源⁩

05 · 系统软件

VirtualBox Windows 11 24H2 (Version 10.0.26100.1742.240906-0331) 04 02 2025 17 34 35

OS: Microsoft Corporation Screenshot: PantheraLeo1359531 😺 (talk) · Public domain · Source · ⁨来源⁩
OnePlus Nord smartphone displaying Android home screen

Gannu03 · CC BY-SA 4.0 · Source · ⁨来源⁩

06 · 安全、隐私与数据完整性

DigitalPersona U.are.U 4500 fingerprint reader

HID DigitalPersona · Product image · Source · ⁨来源⁩
RSA SecurID 700 hardware token

RSA Security · Product image · Source · ⁨来源⁩

07 · 伦理与所有权

CCTV control room monitor wall

Mark Yeomans · CC BY-SA 4.0 · Source · ⁨来源⁩
Ewaste-pile

AvWijk · Public domain · Source · ⁨来源⁩

08 · 数据库

Hand in filing cabinet

Watty62 · CC BY-SA 4.0 · Source · ⁨来源⁩
Hard disk platters and head

Mfield, Matthew Field, http://www.photography.mattfield.com · CC BY-SA 3.0 · Source · ⁨来源⁩

09 · 算法设计与问题求解

Jigsaw puzzle in progress

Balise42 · CC BY-SA 4.0 · Source · ⁨来源⁩

10 · 数据类型与数据结构

Stack of multicolored books on a table

Alexander Grey · CC0 · Source · ⁨来源⁩
Vatican Museum Queue - April 2007

Diliff · CC BY-SA 3.0 · Source · ⁨来源⁩

11 · 程序设计

Java code demonstrating source-code abilities

Ilyaaaaa · CC BY-SA 4.0 · Source · ⁨来源⁩
Programmer at work (Unsplash)

Crew crew · CC0 · Source · ⁨来源⁩

12 · 软件开发

LampFlowchart

svg by Booyabazookaoriginal png by Wapcaplet · CC BY-SA 3.0 · Source · ⁨来源⁩
team-meeting

Startup Stock Photos · CC0 · Source · ⁨来源⁩

14 · 通信与互联网技术

TP-Link Archer AX55 Wi-Fi 6 router

TP-Link · Product image · Source · ⁨来源⁩
Nighthawk CM2000 cable modem

NETGEAR · Product image · Source · ⁨来源⁩
GS308 8-port Gigabit Ethernet switch

NETGEAR · Product image · Source · ⁨来源⁩
Fiber Optical Cable

Bquast · CC0 · Source · ⁨来源⁩
ASTRA2Connect Dish

Satbuff at English Wikipedia · Public domain · Source · ⁨来源⁩

15 · 硬件与虚拟机

CPU cooler

osman gucel · CC BY 2.0 · Source · ⁨来源⁩
Server racks

Carl Lender from Sunrise, USA · CC BY 2.0 · Source · ⁨来源⁩
GeForce RTX 4070 graphics card

NVIDIA · Product image · Source · ⁨来源⁩
ASUS TUF Gaming B650E-PLUS motherboard

ASUS · Product image · Source · ⁨来源⁩

16 · 系统软件

168 pin and 184 pin DIMM

Veeblefetzer · CC BY 4.0 · Source · ⁨来源⁩
Intel CPU Core 2 Duo E8400 Wolfdale perspective

Eric Gaba (Sting - fr:Sting) · CC BY-SA 4.0 · Source · ⁨来源⁩

17 · 安全

YubiKey 5 NFC hardware security key

Yubico · Product image · Source · ⁨来源⁩
Enigma M4 Cipher Machine - Caen Memorial museum 2025-03-24

Andy Li · CC0 · Source · ⁨来源⁩

18 · 人工智能（AI）

Self-driving car

Dllu · CC BY 4.0 · Source · ⁨来源⁩
Humanoid robot

Willy Jackson · CC BY-SA 4.0 · Source · ⁨来源⁩
KUKA Industrial Robots IR

Mixabest · CC BY-SA 3.0 · Source · ⁨来源⁩

19 · 计算思维与问题求解

Telefonbog ubt-1

© 2010 by Tomasz Sienicki [user: tsca, mail: tomasz.sienicki at gmail.com] · CC BY 3.0 · Source · ⁨来源⁩
54 Nancy bibliothèque municipale - catalogue

Marc Baronnet · CC BY-SA 3.0 · Source · ⁨来源⁩

A-Level Economics · ⁨A-Level 经济学⁩

01 · 基本经济概念与资源配置

001 Car factory assembly line - Opel factory in Gliwice, Poland

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨来源⁩
University students in a technology learning classroom

Ellamaria elshmod · CC BY-SA 4.0 · Source · ⁨来源⁩
Bingham Canyon Open Pit Copper Mine 2012-09-17 21-25-59

Jet6581 · CC BY-SA 3.0 · Source · ⁨来源⁩

02 · 价格体系与微观经济

Outdoor market fruit and vegetable stall Market Place Romford London 01

Acabashi · CC BY-SA 4.0 · Source · ⁨来源⁩
Ingo petrol station Fårösund July 01

Arild Vågen · CC BY-SA 4.0 · Source · ⁨来源⁩

03 · 政府微观经济干预

Bonus Cigarettes

Antonio Kless · CC BY-SA 4.0 · Source · ⁨来源⁩
Port Qasim Coal Power Plant, 08.06.2021

VileGecko · CC BY-SA 4.0 · Source · ⁨来源⁩
Rio de Janeiro Favela, Rio de Janeiro State, Brazil 01

Wilfredor · CC0 · Source · ⁨来源⁩

04 · 宏观经济

Central Business District skyline, Singapore, at night

Andrew McMillan · Public domain · Source · ⁨来源⁩
Aisle in Daily Market Groceries Canberra City October 2025

Nick-D · CC BY-SA 4.0 · Source · ⁨来源⁩

05 · 政府宏观经济干预

Bank of England Building, London, UK - Diliff

Diliff · CC BY-SA 3.0 · Source · ⁨来源⁩
Hungarian Parliament Building 1

kallerna · CC BY-SA 4.0 · Source · ⁨来源⁩

06 · 国际经济问题

Currency Exchange - Moldova (by David Stanley)

D-Stanley · CC BY 2.0 · Source · ⁨来源⁩
Red Hook Container Terminal New York September 2016 001

King of Hearts · CC BY-SA 4.0 · Source · ⁨来源⁩
Red Hook Container Terminal New York September 2016 001

King of Hearts · CC BY-SA 4.0 · Source · ⁨来源⁩

07 · 价格体系与微观经济（A Level）

Large interior view of Plaza Singapura Shopping mall Orchard Road Singapore

Basile Morin · CC BY-SA 4.0 · Source · ⁨来源⁩
ArcelorMittal steel plant on the Cuyahoga River

Roy Luck · CC BY 2.0 · Source · ⁨来源⁩
Port Qasim Coal Power Plant, 08.06.2021

VileGecko · CC BY-SA 4.0 · Source · ⁨来源⁩

08 · 政府微观经济干预（A Level）

Rio de Janeiro Favela, Rio de Janeiro State, Brazil 01

Wilfredor · CC0 · Source · ⁨来源⁩
Garment factory in Bangladesh Women working

Tareq Salahuddin from Dhaka, Bangladesh · CC BY 2.0 · Source · ⁨来源⁩
Bonus Cigarettes

Antonio Kless · CC BY-SA 4.0 · Source · ⁨来源⁩

09 · 宏观经济（A Level）

Reigate, Lloyds Bank High Street - geograph.org.uk - 4306372

Michael Garlick · CC BY-SA 2.0 · Source · ⁨来源⁩
Skyscraper Construction in Frankfurt, Germany

Spinarak · CC0 · Source · ⁨来源⁩
Wind turbines (Adair Wind Farm, Iowa, USA) 6 (48916254952)

James St. John · CC BY 2.0 · Source · ⁨来源⁩

10 · 政府宏观经济干预（A Level）

Seat of the European Central Bank and Frankfurt Skyline at dawn 20150422 1

DXR · CC BY-SA 4.0 · Source · ⁨来源⁩
Trading Floor at the New York Stock Exchange

Scott Beale · CC BY-SA 4.0 · Source · ⁨来源⁩

11 · 国际经济问题（A Level）

Aerial image of the Bremerhaven container terminal (view from the southeast)

Carsten Steger · CC BY-SA 4.0 · Source · ⁨来源⁩
Aerial view of a busy tomato market in Lagos Nigeria

Ayorinde Ogundele · CC BY-SA 4.0 · Source · ⁨来源⁩

A-Level Further Mathematics · ⁨A-Level 高等数学⁩

01 · 进阶纯数学1

Sailboat with spinnaker 17RM0454

Ermell · CC BY-SA 4.0 · Source · ⁨来源⁩
Vatican Museums Spiral Staircase 2012

Colin · CC BY-SA 3.0 · Source · ⁨来源⁩

02 · 进阶纯数学2

Romanesco broccoli fractals

Jon Sullivan · Public domain · Source · ⁨来源⁩
Metall-Zierkette in Nahaufnahme

Rhetos · CC0 · Source · ⁨来源⁩

03 · 进阶力学

Newton's Cradle (15221366308)

Sheila Sund from Salem, United States · CC BY 2.0 · Source · ⁨来源⁩
James Parker hammer throw

Tech. Sgt. Mike Hammond · Public domain · Source · ⁨来源⁩
Fuente en Baku, Azerbaiyán, 2016-09-26, DD 227-229 HDR

Diego Delso · CC BY-SA 4.0 · Source · ⁨来源⁩

04 · 进阶概率与统计

Galton box

Exhibit made by Estes Objethos Atelier, photo by Rodrigo.Argenton · CC BY-SA 4.0 · Source · ⁨来源⁩
Dice (typical role playing game dice)

Diacritica · CC BY-SA 3.0 · Source · ⁨来源⁩

A-Level Mathematics · ⁨A-Level 数学⁩

01 · 纯数学1

London Eye at sunset 2013-07-19

Bob Collowan · CC BY-SA 3.0 · Source · ⁨来源⁩
Golden Gate Bridge on a clear day

Ariel E Barry · CC BY-SA 3.0 · Source · ⁨来源⁩

02 · 纯数学2

Seismograph recording

Atomicdragon136 · CC BY 4.0 · Source · ⁨来源⁩
SLNSW 8633 Dense crowd at SCG for test cricket

Sam Hood · Public domain · Source · ⁨来源⁩

03 · 纯数学3

Sailboat with spinnaker 17RM0454

Ermell · CC BY-SA 4.0 · Source · ⁨来源⁩
Romanesco broccoli fractals

Jon Sullivan · Public domain · Source · ⁨来源⁩

04 · 力学

Newton's Cradle (15221366308)

Sheila Sund from Salem, United States · CC BY 2.0 · Source · ⁨来源⁩
Top Rope Climbing

Matito · CC BY-SA 2.0 · Source · ⁨来源⁩
First drop of Leviathan

K2HWY · CC BY 4.0 · Source · ⁨来源⁩

05 · 概率与统计1

Galton box

Exhibit made by Estes Objethos Atelier, photo by Rodrigo.Argenton · CC BY-SA 4.0 · Source · ⁨来源⁩
Dice (typical role playing game dice)

Diacritica · CC BY-SA 3.0 · Source · ⁨来源⁩

06 · 概率与统计2

poisson-queue

@gadl · CC BY-SA 2.0 · Source · ⁨来源⁩
Audience-2595

Loadmaster (David R. Tribble) This image was made by Loadmaster (David R. Tribble). Email the author: David R. Tribble Also see my personal gallery at Google Photos · CC BY-SA 3.0 · Source · ⁨来源⁩

A-Level Physics · ⁨A-Level 物理⁩

01 · 物理量与单位

Mahr Micromar 40A 0–25 mm Micrometer (part labels added)

Lucasbosch · CC BY-SA 3.0 · Source · ⁨来源⁩
Mahr MarCal 16 N vernier caliper

Lucasbosch · CC BY-SA 3.0 · Source · ⁨来源⁩
Messschieber

ArtMechanic · CC BY-SA 3.0 · Source · ⁨来源⁩
5783metric-micrometer

Photograph taken by Glenn McKechnie · CC BY-SA 2.0 · Source · ⁨来源⁩

02 · 运动学

Car speedometer

Chenspec · CC BY-SA 4.0 · Source · ⁨来源⁩
Spd Lmt Enforcement Camera in Seohaean Expwy Haemi IC-Seosan IC(Seoul Dir)

Jhcbs1019 · CC BY-SA 4.0 · Source · ⁨来源⁩

03 · 动力学

Space Shuttle Columbia launching

NASA · Public domain · Source · ⁨来源⁩
Crash test car from the West Germany USA zone before 120278145 (cropped)

Kalispera Dell · CC BY 3.0 · Source · ⁨来源⁩
Group of Skydivers in Freefall Formation at Sunset

Rstpch · CC BY-SA 4.0 · Source · ⁨来源⁩

04 · 力、密度与压强

Fischer precision aneroid barometer

Fischer · Product image · Source · ⁨来源⁩
Glacial iceberg in Argentina

IlyaHaykinson · CC BY 2.0 · Source · ⁨来源⁩
CBD Cranes

Thabang S. Peter · CC BY-SA 4.0 · Source · ⁨来源⁩

05 · 功、能量与功率

Wind turbines along North Middle Road, Essex County, Ontario, 2025-06-29

Crisco 1492 · CC BY-SA 4.0 · Source · ⁨来源⁩
Leviathan ascending (2)

Jason Zhang · CC BY-SA 3.0 · Source · ⁨来源⁩
2013-10-03 Fierza Hydroelectric Power Station, Albania 0632

You may re-use this image under the terms of the license using the following reference: Image: Wikipedia / Tobias Klenze / CC-BY-SA 4.0. The license must be a link! · CC BY 3.0 · Source · ⁨来源⁩
Leichtathletik Gala Linz 2018 pole vault Daubner-6249

Isiwal · CC BY-SA 4.0 · Source · ⁨来源⁩

06 · 固体的形变

Shimadzu AGS-X universal testing machine

Shimadzu · Product image · Source · ⁨来源⁩
SpringHandExerciser

Simon Speed · Public domain · Source · ⁨来源⁩

07 · 波

Rigol DS1054Z digital oscilloscope

Rigol · Product image · Source · ⁨来源⁩
Plastic Protractor Polarized 05375

Nevit Dilmen · CC BY-SA 3.0 · Source · ⁨来源⁩
Breaking waves, Sète cf03

Christian Ferrer · CC BY 4.0 · Source · ⁨来源⁩

08 · 叠加

Two-point-interference-ripple-tank

The original uploader was RenamedUser2 at English Wikipedia · BSD · Source · ⁨来源⁩
Soap Bubble - foliage background - iridescent colours - Traquair 040801

· CC BY-SA 3.0 · Source · ⁨来源⁩

09 · 电学

Electronic-Axial-Lead-Resistors-Array

Evan-Amos · Public domain · Source · ⁨来源⁩
Power lines in Stueng Hav District

Dmitry Makeev · CC BY-SA 4.0 · Source · ⁨来源⁩

10 · 直流电路

Multimeter probes on breadboard

Zeroping · CC BY 4.0 · Source · ⁨来源⁩
400 points breadboard

oomlout · CC BY-SA 2.0 · Source · ⁨来源⁩
Multimeter resistor bank (6952361918)

Dennis van Zuijlekom from Ermelo, The Netherlands · CC BY-SA 2.0 · Source · ⁨来源⁩

11 · 粒子物理

Artificial nuclide americium-241 emitting alpha particles inserted into a cloud chamber for visualisation

Nuledo · CC BY-SA 4.0 · Source · ⁨来源⁩
Bubble chamber event. Decay of neutral lambda, anti-lambda hyperons. Photograph circa July 1959. Bubble Chamber-772A - DPLA - 5141859e360581251906c073668c70de

Department of Energy. Lawrence Berkeley National Laboratory. Public Affairs Department. Strategic Resources Office. Photography Services. 2012 · Public domain · Source · ⁨来源⁩
Compact Linear Accelerator for Research and Applications (CLARA)

D2theW · CC0 · Source · ⁨来源⁩

12 · 圆周运动

Ferris wheel Nice Dec 2008 a

Cayambe · CC BY-SA 3.0 · Source · ⁨来源⁩
Ferris wheel Nice Dec 2008 a

Cayambe · CC BY-SA 3.0 · Source · ⁨来源⁩

13 · 引力场

Saturn during Equinox

NASA / JPL / Space Science Institute · Public domain · Source · ⁨来源⁩
STS-135 final flyaround of ISS 1

NASA · Public domain · Source · ⁨来源⁩

14 · 温度

Hot fries, cold drink. (17176913004)

Daniel Ramirez from Honolulu, USA · CC BY 2.0 · Source · ⁨来源⁩
Mercury Thermometer

Anonimski · CC BY-SA 3.0 · Source · ⁨来源⁩

15 · 理想气体

Scuba diver practising a no mask swim

Yu Diving · CC BY-SA 2.0 · Source · ⁨来源⁩
2008-07-24 Bundle of compressed gas bottles

Ildar Sagdejev (Specious) · CC BY-SA 4.0 · Source · ⁨来源⁩

16 · 热力学

Dampfturbine Laeufer01

Siemens Pressebild, http://www.siemens.com · CC BY-SA 3.0 · Source · ⁨来源⁩
Rostock Power Station, SW view

Radomianin · CC BY-SA 4.0 · Source · ⁨来源⁩

17 · 振动

Tacoma Narrows still

Barney Elliot · Public Domain · Source · ⁨来源⁩
Shortt Synchronome free pendulum clock

Unknown authorUnknown author · Public domain · Source · ⁨来源⁩
Close up of an acoustic guitar being played

Nataev · CC BY-SA 4.0 · Source · ⁨来源⁩

18 · 电场

Van de Graaff generator

3B Scientific · Product image · Source · ⁨来源⁩
Lightning strike jan 2007

Fir0002 · GFDL 1.2 · Source · ⁨来源⁩

19 · 电容

Capacitors Various

Intiti · Public domain · Source · ⁨来源⁩
Electrolytic capacitors mounted on a circuit board

Giovanna 27 · CC BY 4.0 · Source · ⁨来源⁩

20 · 磁场

Bar-magnets-repelling-iron-filings-max

MikeRun, Vera Wurmsdobler · CC BY-SA 4.0 · Source · ⁨来源⁩
Iron-filings-around-magnet

· CC BY-SA 2.0 · Source · ⁨来源⁩
HITACHI, Magnetic Resonance Imaging System, ECHELON OVAL,

Mj-bird · CC BY-SA 3.0 · Source · ⁨来源⁩

21 · 交流电

Triangular wave and square wave on oscilloscope screen (cropped)

User:Xato · CC0 · Source · ⁨来源⁩
Muurame electrical substation transformer

Antti Leppänen · CC BY 4.0 · Source · ⁨来源⁩

22 · 量子物理

Periodic Table of Photos of Element Spectra

Umop503 · CC0 · Source · ⁨来源⁩
Ground mounted solar panels.gk

Grendelkhan · CC BY-SA 4.0 · Source · ⁨来源⁩

23 · 核物理

De Molen (windmill) and the nuclear power plant cooling tower in Doel, Belgium (DSCF3859)

Trougnouf · CC BY 4.0 · Source · ⁨来源⁩
Particle Tracks in AWAN Expansion Cloud Chamber

Kebuk awan · CC BY-SA 4.0 · Source · ⁨来源⁩

24 · 医学物理

Chest Xray PA 3-8-2010

Stillwaterising · CC0 · Source · ⁨来源⁩
PET-image

Jens Maus (http://jens-maus.de/) · Public domain · Source · ⁨来源⁩
Obstetric ultrasound scan monitor showing 20-week human fetus profile in Navi Mumbai 2015

Goleisureintl · CC BY 4.0 · Source · ⁨来源⁩

25 · 天文学与宇宙学

Hubble Ultra Deep Field

NASA and the European Space Agency. Edited by Noodle snacks · Public domain · Source · ⁨来源⁩
Andromeda Galaxy (M31)

Adam Evans · CC BY 2.0 · Source · ⁨来源⁩
Pillars of Creation (Eagle Nebula)

NASA, ESA, and the Hubble Heritage Team (STScI/AURA) · Public domain · Source · ⁨来源⁩
Very Large Telescope (ESO)

G.Gillet/ESO · CC BY 3.0 · Source · ⁨来源⁩

0101 · Physical quantities · ⁨物理量⁩

Digital vernier caliper

Jacek Halicki · CC BY-SA 4.0 · Source · ⁨来源⁩

0102 · SI units · ⁨SI 单位⁩

Prototype kilogram replica

Japs 88 · CC BY-SA 3.0 · Source · ⁨来源⁩

AP 2-D Art and Design · ⁨AP 2-D 艺术与⁩

01 · 艺术元素

Wright of Derby, The Orrery

Joseph Wright of Derby · Public domain · Source · ⁨来源⁩
Vincent van Gogh - Sunflowers - VGM F458

Vincent van Gogh · Public domain · Source · ⁨来源⁩
The Great Wave off Kanagawa

After Katsushika Hokusai · Public domain · Source · ⁨来源⁩
Jeansfabric

Thegreenj · CC BY-SA 3.0 · Source · ⁨来源⁩
Vincent van Gogh - Self-Portrait - Google Art Project (454045)

Vincent van Gogh · Public domain · Source · ⁨来源⁩

02 · 设计原则

Da Vinci Vitruve Luc Viatour

Leonardo da Vinci · Public domain · Source · ⁨来源⁩
Textile, Strawberry Thief, designed 1883, printed ca. 1934 (CH 18340065)

Unknown artistUnknown artist · Public domain · Source · ⁨来源⁩
Vincent van Gogh - Starry Night - Google Art Project

Vincent van Gogh · Public domain · Source · ⁨来源⁩
Wright of Derby, The Orrery

Joseph Wright of Derby · Public domain · Source · ⁨来源⁩

03 · 二维媒介、材料与技法

Albrecht Dürer - Melencolia I - Google Art Project (427760)

Albrecht Dürer · Public domain · Source · ⁨来源⁩
Alfred Stieglitz - The Steerage - Google Art Project, from Getty

Alfred Stieglitz · Public domain · Source · ⁨来源⁩
Claude Monet - Seerosen

Claude Monet · Public domain · Source · ⁨来源⁩

04 · 探究：探问与艺术创作过程

First Page of "Splendid Mountain Watercolours" Sketchbook MET 219169

John Singer Sargent · CC0 · Source · ⁨来源⁩
Color wheel with primaries and secondaries

eXercise project · CC0 · Source · ⁨来源⁩
The Great Wave off Kanagawa

After Katsushika Hokusai · Public domain · Source · ⁨来源⁩
Jean-Auguste-Dominique Ingres - Portrait of Guillaume Guillon-Lethière - Google Art Project

Jean-Auguste-Dominique Ingres · Public domain · Source · ⁨来源⁩

05 · 创作：实践、实验与修改

Michelangelo - Study of an Ignudo -Teylers Museum

Michelangelo · Public domain · Source · ⁨来源⁩
Vincent van Gogh - Starry Night - Google Art Project

Vincent van Gogh · Public domain · Source · ⁨来源⁩
The Great Wave off Kanagawa

After Katsushika Hokusai · Public domain · Source · ⁨来源⁩

06 · 呈现：沟通与AP作品集

Portrait of Alphonse Gérard, Comte de Rayneval (by Jean Auguste Dominique Ingres)

Jean-Auguste-Dominique Ingres · Public domain · Source · ⁨来源⁩
Claude Monet - Seerosen

Claude Monet · Public domain · Source · ⁨来源⁩
Kathe Kollwitz - Self-portrait NGA 1943.3.5217

Käthe Kollwitz · Public domain · Source · ⁨来源⁩

AP Biology · ⁨AP 生物⁩

01 · 生命的化学

Iceberg with hole near Sandersons Hope 2007-07-28 2

Kim Hansen · CC BY-SA 3.0 · Source · ⁨来源⁩
DNA Double Helix by NHGRI

National Human Genome Research Institute · Public domain · Source · ⁨来源⁩
1GZX Haemoglobin

Zephyris at English Wikipedia · CC BY-SA 3.0 · Source · ⁨来源⁩

02 · 细胞结构与功能

Onion Epidermis Cells W.M. 40x - 104

loganrickert · CC BY 2.0 · Source · ⁨来源⁩
Cloroplasti Elodea

Cimice50 · CC BY-SA 4.0 · Source · ⁨来源⁩
SEM blood cells

Bruce Wetzel (photographer). Harry Schaefer (photographer) · Public domain · Source · ⁨来源⁩
Plasmolysis of red onion (Allium cepa) cells

Trương Minh Khải · CC BY 4.0 · Source · ⁨来源⁩

03 · 细胞能量学

Mitochondria, mammalian lung - TEM

Louisa Howard · Public domain · Source · ⁨来源⁩
Cloroplasti Elodea

Cimice50 · CC BY-SA 4.0 · Source · ⁨来源⁩
Plastic spoon n Laundry detergent n Washing powder in white

Lebacno · CC BY-SA 3.0 · Source · ⁨来源⁩

04 · 细胞通讯与细胞周期

Onion skin mitosis 20x magnification - uafcde

UAF Center for Distance Education · CC BY 2.0 · Source · ⁨来源⁩
Human fibroblast undergoing cytokinesis

Reneferretti1 · CC BY 4.0 · Source · ⁨来源⁩
Mitosis in Onion Root various stages (Metaphase)

Natalierussell77 · CC BY-SA 4.0 · Source · ⁨来源⁩
1225 Chemical Synapse ku

https://openstax.org · CC BY 4.0 · Source · ⁨来源⁩

05 · 遗传

Karyotype (normal)

National Cancer Institute · Public domain · Source · ⁨来源⁩
Cepaea nemoralis pair banded shells

· CC BY-SA 2.0 · Source · ⁨来源⁩

06 · 基因表达与调控

Agarose gel electrophoresis in UV light

YTEDG72.k · CC BY 4.0 · Source · ⁨来源⁩
Thermal cycler for PCR

Juan Carlos Fonseca Mata · CC BY-SA 4.0 · Source · ⁨来源⁩
DNA Extraction

Joo Nath · CC BY-SA 4.0 · Source · ⁨来源⁩

07 · 自然选择

Antibiotic sensitivity test

Dr Graham Beards · CC BY-SA 4.0 · Source · ⁨来源⁩
Biston.betularia.f.carbonaria.7209

Chiswick Chap · CC BY-SA 3.0 · Source · ⁨来源⁩
Berlin Archaeopteryx

Emily Willoughby ([email protected]) · CC BY-SA 4.0 · Source · ⁨来源⁩
Stromatolites in Shark Bay

Happy Little Nomad · CC BY-SA 2.0 · Source · ⁨来源⁩
Tree of life SVG

Ivica Letunic: Iletunic. Retraced by Mariana Ruiz Villarreal: LadyofHats · Public domain · Source · ⁨来源⁩
Active hydrothermal vent- Mushroom (OOI 222)

Ocean Observatories Initiative · Public domain · Source · ⁨来源⁩
Berlin Archaeopteryx

Emily Willoughby ([email protected]) · CC BY-SA 4.0 · Source · ⁨来源⁩

08 · 生态学

Coral Outcrop Flynn Reef

Toby Hudson · CC BY-SA 3.0 · Source · ⁨来源⁩
Deforested area, Goldisthal, 2023-05-20

Radomianin · CC BY-SA 4.0 · Source · ⁨来源⁩
Ocellaris clownfish

Metatron · CC BY-SA 3.0 · Source · ⁨来源⁩
A herd of white-tailed deer (Odocoileus virginianus) (5db1cb2b-e72c-4f15-a4d1-662e91c83945)

NPS Photo · Public domain · Source · ⁨来源⁩
Sunflower against the blue sky

Timothy Akolamazima · CC BY-SA 4.0 · Source · ⁨来源⁩

AP Calculus AB · ⁨AP 微积分 AB⁩

01 · 极限与连续性

GoldenGateBridge-001

Rich Niewiroski Jr · CC BY 2.5 · Source · ⁨来源⁩

02 · 微分：定义与基本性质

Cedar Point Rougarou cars on loop track (2859)

Bobby Proffer · CC BY-SA 3.0 · Source · ⁨来源⁩

03 · 微分：复合、隐式与反函数

Matryoshka dolls - Bor local museum

Лапоть · CC0 · Source · ⁨来源⁩

04 · 微分在实际情境中的应用

Cedar Point Rougarou cars on loop track (2859)

Bobby Proffer · CC BY-SA 3.0 · Source · ⁨来源⁩
Hot air balloon IMGP0344a

Alexey V. Kurochkin · CC BY-SA 4.0 · Source · ⁨来源⁩

05 · 微分的分析性应用

Matterhorn Riffelsee 2005-06-11

Dirk Beyer · CC BY-SA 3.0 · Source · ⁨来源⁩
New fenced enclosures at garden centre - geograph.org.uk - 6877019

Alan Reid · CC BY-SA 2.0 · Source · ⁨来源⁩

06 · 积分与变化的累积

Water tank

Muhammad Saeed · CC BY-SA 3.0 · Source · ⁨来源⁩

07 · 微分方程

EscherichiaColi NIAID

NIAID · Public domain · Source · ⁨来源⁩
Black Coffee and Tea in White Cup is Hot

epSos.de · CC BY 2.0 · Source · ⁨来源⁩

08 · 积分的应用

Potter at work

Whippetsgalore · CC BY-SA 4.0 · Source · ⁨来源⁩

AP Calculus BC · ⁨AP 微积分 BC⁩

01 · 极限与连续性

GoldenGateBridge-001

Rich Niewiroski Jr · CC BY 2.5 · Source · ⁨来源⁩

02 · 微分：定义与基本性质

Cedar Point Rougarou cars on loop track (2859)

Bobby Proffer · CC BY-SA 3.0 · Source · ⁨来源⁩

03 · 微分：复合、隐式与反函数

Matterhorn Riffelsee 2005-06-11

Dirk Beyer · CC BY-SA 3.0 · Source · ⁨来源⁩

04 · 微分在实际情境中的应用

Cedar Point Rougarou cars on loop track (2859)

Bobby Proffer · CC BY-SA 3.0 · Source · ⁨来源⁩
Hot air balloon IMGP0344a

Alexey V. Kurochkin · CC BY-SA 4.0 · Source · ⁨来源⁩

05 · 微分的分析性应用

Matterhorn Riffelsee 2005-06-11

Dirk Beyer · CC BY-SA 3.0 · Source · ⁨来源⁩
New fenced enclosures at garden centre

Alan Reid · CC BY-SA 2.0 · Source · ⁨来源⁩

06 · 积分与变化的累积

Water tank

Muhammad Saeed · CC BY-SA 3.0 · Source · ⁨来源⁩

07 · 微分方程

EscherichiaColi NIAID

NIAID · Public domain · Source · ⁨来源⁩
Black Coffee and Tea in White Cup is Hot

epSos.de · CC BY 2.0 · Source · ⁨来源⁩

08 · 积分的应用

Golden Gate Bridge on a clear day

Ariel E Barry · CC BY-SA 3.0 · Source · ⁨来源⁩
Potter at work

Whippetsgalore · CC BY-SA 4.0 · Source · ⁨来源⁩

09 · 参数方程、极坐标与向量值函数

International Space Station after undocking of STS-132

NASA/Crew of STS-132 · Public domain · Source · ⁨来源⁩

10 · 无穷数列与级数

Russian-Matroshka no bg

Original photo: User:Fanghong Derivative work: User:Gnomz007 · CC BY-SA 3.0 · Source · ⁨来源⁩

AP Chemistry · ⁨AP 化学⁩

01 · 原子结构与性质

Coloured flames of methanol solutions of metal salts and compounds

Hegelrast · CC BY-SA 4.0 · Source · ⁨来源⁩
Simple Periodic Table of Elements

SCB2024 · CC0 · Source · ⁨来源⁩

02 · 化合物的结构与性质

Halite (rock salt) crystal

Didier Descouens · CC BY-SA 4.0 · Source · ⁨来源⁩
Octahedral diamond

James St. John · CC BY 2.0 · Source · ⁨来源⁩
Copper (29 Cu)

Hi-Res Images of Chemical Elements · CC BY 3.0 · Source · ⁨来源⁩

03 · 物质与混合物的性质

Copper sulfate pentahydrate crystals

W. Oelen · CC BY-SA 3.0 · Source · ⁨来源⁩
Steam-boiling green asparagus

W.carter · CC0 · Source · ⁨来源⁩

04 · 化学反应

Magnesium ribbon burning

Capt. John Yossarian · CC BY-SA 3.0 · Source · ⁨来源⁩
Acid and Base Titration

Kengksn · CC BY-SA 4.0 · Source · ⁨来源⁩

05 · 化学动力学

Catalytic converter (4293629922)

Oak Ridge National Laboratory · CC BY 2.0 · Source · ⁨来源⁩
Gas syringe

User:Geni · CC BY-SA 3.0 · Source · ⁨来源⁩

06 · 热化学

Daiso instant cold pack 300g

photo: Qurren (talk) Taken with Canon PowerShot G9 X · CC BY-SA 4.0 · Source · ⁨来源⁩
Steam-boiling green asparagus

W.carter · CC0 · Source · ⁨来源⁩

07 · 化学平衡

Cobalt(II) chloride solutions

Leiem · CC BY-SA 4.0 · Source · ⁨来源⁩
Yara-Werk bei Tagesanbruch 2011

5snake5 · CC BY-SA 4.0 · Source · ⁨来源⁩

08 · 酸与碱

Blue and red litmus paper

Meganbeckett27 · CC BY-SA 3.0 · Source · ⁨来源⁩
PH Test Strips

Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source · ⁨来源⁩
PH Test Strips

Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source · ⁨来源⁩

09 · 热力学与电化学

AA VARTA battery-side PNr°0782

D-Kuru · CC BY-SA 4.0 · Source · ⁨来源⁩
AA VARTA battery-side PNr°0782

D-Kuru · CC BY-SA 4.0 · Source · ⁨来源⁩
AA VARTA battery-side PNr°0782

D-Kuru · CC BY-SA 4.0 · Source · ⁨来源⁩

AP Computer Science A · ⁨AP 计算机科学 A⁩

01 · 使用对象与方法

Intel CPU Core 2 Duo E8400 Wolfdale perspective

Eric Gaba (Sting - fr:Sting) · CC BY-SA 4.0 · Source · ⁨来源⁩
Screen-python-code-matplotlib-physics-simulation

MikeRun · CC BY-SA 4.0 · Source · ⁨来源⁩

02 · 选择与迭代

LampFlowchart

svg by Booyabazookaoriginal png by Wapcaplet · CC BY-SA 3.0 · Source · ⁨来源⁩
UK Red Traffic Light With Green Filter Arrow - geograph.org.uk - 6409628

Gary · CC BY-SA 2.0 · Source · ⁨来源⁩
001 Car factory assembly line - Opel factory in Gliwice, Poland

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨来源⁩

03 · 类的创建

Jigsaw puzzle in progress

Balise42 · CC BY-SA 4.0 · Source · ⁨来源⁩
Blueprint - Hallwylska museet - 101011

Unknown authorUnknown author · Public domain · Source · ⁨来源⁩

04 · 数据集合

Hand in filing cabinet

Watty62 · CC BY-SA 4.0 · Source · ⁨来源⁩
Datacenter Server Racks (22370909788)

Carl Lender from Sunrise, USA · CC BY 2.0 · Source · ⁨来源⁩

AP Computer Science Principles · ⁨AP 计算机科学原理⁩

01 · 创造性开发

Programmer at work (Unsplash)

Crew crew · CC0 · Source · ⁨来源⁩
Jigsaw puzzle in progress

Balise42 · CC BY-SA 4.0 · Source · ⁨来源⁩

02 · 数据

Binary-code

Graph+sas · CC BY-SA 4.0 · Source · ⁨来源⁩
Hard disk platters and head

Mfield, Matthew Field, http://www.photography.mattfield.com · CC BY-SA 3.0 · Source · ⁨来源⁩

03 · 算法与编程

Telefonbog ubt-1

© 2010 by Tomasz Sienicki [user: tsca, mail: tomasz.sienicki at gmail.com] · CC BY 3.0 · Source · ⁨来源⁩
Screen-python-code-matplotlib-physics-simulation

MikeRun · CC BY-SA 4.0 · Source · ⁨来源⁩

04 · 计算机系统与网络

Ethernet RJ45 connector p1160054

No machine-readable author provided. David.Monniaux assumed (based on copyright claims) · CC BY-SA 3.0 · Source · ⁨来源⁩
Datacenter Server Racks (22370909788)

Carl Lender from Sunrise, USA · CC BY 2.0 · Source · ⁨来源⁩
Netgear-Nighthawk-AC1900-WiFi-Router

Evan-Amos · Public domain · Source · ⁨来源⁩

05 · 计算的影响

CCTV control room monitor wall

Mark Yeomans · CC BY-SA 4.0 · Source · ⁨来源⁩
Ewaste-pile

AvWijk · Public domain · Source · ⁨来源⁩
Self-driving car

Dllu · CC BY 4.0 · Source · ⁨来源⁩
Computer stations at Uganda Development Services Public Library, Kamuli district

AKibombo · CC BY-SA 4.0 · Source · ⁨来源⁩
HughesNet Satellite Internet Dish at Rural Cabin (42696447671)

Tony Webster from Minneapolis, Minnesota, United States · CC BY 2.0 · Source · ⁨来源⁩
Gender Gap Wikipedia Edit-a-thon (6)

Liridon · CC BY-SA 4.0 · Source · ⁨来源⁩

AP Cybersecurity · ⁨AP 网络安全⁩

01 · 安全导论

YubiKey 5 NFC hardware security key

Yubico · Product image · Source · ⁨来源⁩
RSA SecurID 700 hardware token

RSA Security · Product image · Source · ⁨来源⁩

02 · 保护物理空间

CCTV control room monitor wall

Mark Yeomans · CC BY-SA 4.0 · Source · ⁨来源⁩
Vandal dome-style security camera next to signage on exterior of Target store

Myotus · CC BY-SA 4.0 · Source · ⁨来源⁩
Padlock 7642

ImagePerson · CC BY-SA 4.0 · Source · ⁨来源⁩

03 · 保护网络

Ethernet switch 2

Deavmi · CC BY-SA 3.0 · Source · ⁨来源⁩
Datacenter Server Racks (22370909788)

Carl Lender from Sunrise, USA · CC BY 2.0 · Source · ⁨来源⁩

04 · 保护设备

YubiKey 4 and 4C

Tony Webster from Minneapolis, Minnesota, United States. Cropped by SUM1 · CC BY 2.0 · Source · ⁨来源⁩
ClamTk 5.27

Mauroni, Dave · GPL · Source · ⁨来源⁩
Biometric Fingerprint Scanner

Sanskritibharti1398 · CC BY-SA 4.0 · Source · ⁨来源⁩

05 · 保护应用与数据

Enigma-IMG 0487-black

Rama · CC BY-SA 2.0 fr · Source · ⁨来源⁩
Enigma M4 Cipher Machine - Caen Memorial museum 2025-03-24

Andy Li · CC0 · Source · ⁨来源⁩
Padlock 7642

ImagePerson · CC BY-SA 4.0 · Source · ⁨来源⁩

AP Drawing · ⁨AP 绘画⁩

01 · 线条与笔触

Albrecht Dürer - Praying Hands, 1508 - Google Art Project

Albrecht Dürer · Public domain · Source · ⁨来源⁩
Michelangelo - Study of an Ignudo -Teylers Museum

Michelangelo · Public domain · Source · ⁨来源⁩
Seurat Paul Signac

Georges Seurat · Public domain · Source · ⁨来源⁩

02 · 明度、光影与形体

Seurat Paul Signac

Georges Seurat · Public domain · Source · ⁨来源⁩

03 · 空间、纵深与比例

Amboy (California, USA), Hist. Route 66 -- 2012 -- 1

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨来源⁩
Smoky Mountain Vista from Andrews Bald

Scott Basford · CC BY-SA 3.0 · Source · ⁨来源⁩

04 · 绘画媒介与创作过程

Schets van een stilleven van pannen en een fles, RP-T-1962-20(V)

Rijksmuseum · CC0 · Source · ⁨来源⁩
Jean-Auguste-Dominique Ingres - Portrait of Guillaume Guillon-Lethière - Google Art Project

Jean-Auguste-Dominique Ingres · Public domain · Source · ⁨来源⁩
Tobias asleep, Rembrandt van Rijn, c. 1651, pen and brown ink, corrected with white gouache, 16.9 by 19.0 cm, Museum Boijmans Van Beuningen, Rotterdam

Rembrandt · Public domain · Source · ⁨来源⁩
Edgar Degas - Ballet (L'Étoile)

Edgar Degas · Public domain · Source · ⁨来源⁩
Rembrandt The Three Crosses 1653

Rembrandt · Public domain · Source · ⁨来源⁩

05 · 探究：探问与艺术创作过程

First Page of "Splendid Mountain Watercolours" Sketchbook MET 219169

John Singer Sargent · CC0 · Source · ⁨来源⁩
Albrecht Dürer - Melencolia I - Google Art Project (427760)

Albrecht Dürer · Public domain · Source · ⁨来源⁩
Jean-Auguste-Dominique Ingres - Portrait of Guillaume Guillon-Lethière - Google Art Project

Jean-Auguste-Dominique Ingres · Public domain · Source · ⁨来源⁩

06 · 创作：实践、实验与修改

Michelangelo - Study of an Ignudo -Teylers Museum

Michelangelo · Public domain · Source · ⁨来源⁩
Da Vinci Vitruve Luc Viatour

Leonardo da Vinci · Public domain · Source · ⁨来源⁩
Cezanne Still Life with Apples a Bottle and a Milk Pot

Paul Cézanne · Public domain · Source · ⁨来源⁩

07 · 呈现：沟通与AP绘画作品集

Portrait of Alphonse Gérard, Comte de Rayneval (by Jean Auguste Dominique Ingres)

Jean-Auguste-Dominique Ingres · Public domain · Source · ⁨来源⁩
Artist studio

Studiotarekatoui · CC BY-SA 4.0 · Source · ⁨来源⁩
Albrecht Dürer - Praying Hands, 1508 - Google Art Project

Albrecht Dürer · Public domain · Source · ⁨来源⁩
First Page of "Splendid Mountain Watercolours" Sketchbook MET 219169

John Singer Sargent · CC0 · Source · ⁨来源⁩

AP English Literature and Composition · ⁨AP 英语文学与写作⁩

02 · 诗歌一

Page of text with commentary and pointers in margins (NYPL b12455533-423678)

Scan by NYPL · Public domain · Source · ⁨来源⁩

AP Environmental Science · ⁨AP 环境科学⁩

01 · 生物世界：生态系统

Moore Reef underwater ReefScape

Holobionics · CC BY-SA 4.0 · Source · ⁨来源⁩
Palawan, Tropical jungle rainforest

Vyacheslav Argenberg · CC BY 4.0 · Source · ⁨来源⁩
Sossusvlei sand dunes

Winfried Bruenken (Amrum) · CC BY-SA 2.5 · Source · ⁨来源⁩

02 · 生物世界：生物多样性

Northwest Crown Fire Experiment

(Photograph used by permission of the USDA Forest Service.) · CC BY 2.5 · Source · ⁨来源⁩
Rock covered with multicolored patches of lichen

Tomascastelazo · CC BY-SA 4.0 · Source · ⁨来源⁩
Moore Reef underwater ReefScape

Holobionics · CC BY-SA 4.0 · Source · ⁨来源⁩

03 · 种群

African Elephant and calf (7513392380)

shankar s. from Dubai, united arab emirates · CC BY 2.0 · Source · ⁨来源⁩
European rabbit (Oryctolagus cuniculus) kitten

Alexis Lours · CC BY 2.0 · Source · ⁨来源⁩
A herd of white-tailed deer (Odocoileus virginianus) (5db1cb2b-e72c-4f15-a4d1-662e91c83945)

NPS Photo · Public domain · Source · ⁨来源⁩
Shibuya Crossing (53333799585)

Dick Thomas Johnson from Tokyo, Japan · CC BY 2.0 · Source · ⁨来源⁩

04 · 地球系统与资源

Soil Profile Containing an Argillic Horizon

Cjrufe · CC0 · Source · ⁨来源⁩
001 Volcano eruption of Litli-Hrútur in Iceland in 2023 Photo by Giles Laurent

Giles Laurent · CC BY-SA 4.0 · Source · ⁨来源⁩
Soil Profile Containing an Argillic Horizon

Cjrufe · CC0 · Source · ⁨来源⁩
Sossusvlei sand dunes

Winfried Bruenken (Amrum) · CC BY-SA 2.5 · Source · ⁨来源⁩
00 1838 Iguazu Falls from the Brazilian side

W. Bulach · CC BY-SA 4.0 · Source · ⁨来源⁩

05 · 土地与水资源利用

Longsheng Rice Terraces November 2017 014

King of Hearts · CC BY-SA 4.0 · Source · ⁨来源⁩
2019 Bingham Canyon Mine 04

Farragutful · CC BY-SA 4.0 · Source · ⁨来源⁩
WITHIN A MILE OF MAGNIFICENT REDWOODS ARE SITES OF SOME OF THE WORST LOGGING AND CLEAR CUTTING - NARA - 542855

Tomas Sennett · Public domain · Source · ⁨来源⁩
Aerial view of suburban housing in Blacklick, Ohio, October 2024

Pi.1415926535 · CC BY-SA 4.0 · Source · ⁨来源⁩
SPRAYING PESTICIDES - NARA - 544246 (cropped)

John Messina · Public domain · Source · ⁨来源⁩
Wind turbines (Adair Wind Farm, Iowa, USA) 6 (48916254952)

James St. John · CC BY 2.0 · Source · ⁨来源⁩
Farmland near Bradeley Green in Cheshire - geograph.org.uk - 5271496

Roger Kidd · CC BY-SA 2.0 · Source · ⁨来源⁩

06 · 能源资源与消耗

TurowCoalMine

Petr Vodička · CC BY-SA 4.0 · Source · ⁨来源⁩
Olkiluoto 1&2

kallerna · Public domain · Source · ⁨来源⁩
Krafla power plant - Kröflustöð

Villy Fink Isaksen · CC BY-SA 4.0 · Source · ⁨来源⁩
Dülmen, Kirchspiel, Welte, Windräder -- 2010 -- 3519

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨来源⁩
Paneles solares en Cariñena, España, 2015-01-08, DD 08

Diego Delso · CC BY-SA 4.0 · Source · ⁨来源⁩
Glen Canyon Dam 2013

Tuxyso · CC BY-SA 3.0 · Source · ⁨来源⁩
Paneles solares en Cariñena, España, 2015-01-08, DD 08

Diego Delso · CC BY-SA 4.0 · Source · ⁨来源⁩
Dülmen, Kirchspiel, Welte, Windräder -- 2010 -- 3519

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨来源⁩

07 · 大气污染

Salt Lake City smog haze skyline 01

Eltiempo10 · CC BY-SA 4.0 · Source · ⁨来源⁩
Waldsterben am Falkenstein

Rosa-Maria Rinkl · CC BY 4.0 · Source · ⁨来源⁩
Chulla cookstove tamil nadu india

mckaysavage · CC BY 2.0 · Source · ⁨来源⁩

08 · 水生与陆地污染

Detail of mangrove roots

Jonathan Wilkins · CC BY-SA 3.0 · Source · ⁨来源⁩
Pond covered in algae

Mijesty · CC BY-SA 4.0 · Source · ⁨来源⁩
Knott Landfill - Deschutes County, Oregon

Tequask · CC BY-SA 4.0 · Source · ⁨来源⁩

09 · 全球变化

Largest ever Ozone hole sept2000

NASA · Public domain · Source · ⁨来源⁩
Bleached colony of Acropora coral

Vardhanjp · CC BY-SA 4.0 · Source · ⁨来源⁩
Hubbard Glacier calving Alaska. (12027161386)

Bernard Spragg. NZ from Christchurch, New Zealand · CC0 · Source · ⁨来源⁩
Kudzu on trees in Atlanta, Georgia

Scott Ehardt · Public domain · Source · ⁨来源⁩
A coral reef on the Great Barrier Reef

Toby Hudson · CC BY-SA 3.0 · Source · ⁨来源⁩
TurowCoalMine

Petr Vodička · CC BY-SA 4.0 · Source · ⁨来源⁩

AP European History · ⁨AP 欧洲历史⁩

01 · 文艺复兴与探索时代

Musée de l'imprimerie de Nantes - 075 - Presse à bras en bois, commandé par Gutenberg

Koreller · CC BY-SA 4.0 · Source · ⁨来源⁩
Type case with movable types for letterpress printing in the Gutenberg Museum, Mainz, Germany (48988492232)

dronepicr · CC BY 2.0 · Source · ⁨来源⁩

03 · 专制主义与宪政主义

Chateau Versailles Galerie des Glaces

Myrabella · CC BY-SA 3.0 · Source · ⁨来源⁩

06 · 工业化及其影响,约1815年至约1914年

Mule MOSI Textile Hall 6410

Clem Rutter, Rochester, Kent · CC BY 3.0 · Source · ⁨来源⁩
Crystal Palace - interior

J. McNeven · Public domain · Source · ⁨来源⁩

08 · 20世纪的全球冲突,约1914年至今

Cheshire Regiment trench Somme 1916

John Warwick Brooke · Public domain · Source · ⁨来源⁩

AP Human Geography · ⁨AP 人文地理⁩

01 · 地理思维

Shibuya Crossing (53333799585)

Dick Thomas Johnson from Tokyo, Japan · CC BY 2.0 · Source · ⁨来源⁩
Aerial view of suburban housing in Blacklick, Ohio, October 2024

Pi.1415926535 · CC BY-SA 4.0 · Source · ⁨来源⁩

02 · 人口与迁移的格局与过程

Shibuya Crossing (53333799585)

Dick Thomas Johnson from Tokyo, Japan · CC BY 2.0 · Source · ⁨来源⁩
Hungarian Immigrants Cleveland

Hu Totya · Public domain · Source · ⁨来源⁩
Hungarian Immigrants Cleveland

Hu Totya · Public domain · Source · ⁨来源⁩

03 · 文化的格局与过程

Seattle - Chinatown gate 01

Joe Mabel · CC BY-SA 3.0 · Source · ⁨来源⁩
SF Chinatown street sign Clay

Daniel Schwen · CC BY-SA 4.0 · Source · ⁨来源⁩
SF Chinatown street sign Clay

Daniel Schwen · CC BY-SA 4.0 · Source · ⁨来源⁩

04 · 政治的格局与过程

Hungarian Parliament Building 1

kallerna · CC BY-SA 4.0 · Source · ⁨来源⁩
WITHIN A MILE OF MAGNIFICENT REDWOODS ARE SITES OF SOME OF THE WORST LOGGING AND CLEAR CUTTING - NARA - 542855

Tomas Sennett · Public domain · Source · ⁨来源⁩
Hong Kong skyline

victorgrigas · CC BY-SA 3.0 · Source · ⁨来源⁩
UN General Assembly hall

Patrick Gruban, cropped and downsampled by Pine · CC BY-SA 2.0 · Source · ⁨来源⁩
US-Mexico border fence

Office of Representative Phil Gingrey · Public domain · Source · ⁨来源⁩

05 · 农业与乡村土地利用的格局与过程

Combine harvester cutting wheat at Arbuthnott, Aberdeenshire - geograph.org.uk - 8117522

Adrian Diack · CC BY-SA 2.0 · Source · ⁨来源⁩
Farmer using a hoe in a farm

Adesolive · CC BY-SA 4.0 · Source · ⁨来源⁩
Rows in a tea plantation

Adesolive · CC BY-SA 4.0 · Source · ⁨来源⁩
Combine harvester cutting wheat at Arbuthnott, Aberdeenshire - geograph.org.uk - 8117522

Adrian Diack · CC BY-SA 2.0 · Source · ⁨来源⁩

06 · 城市与城市土地利用的格局与过程

Manhattan skyline from Upper New York Bay, 20231001 1041 0889

Jakub Hałun · CC BY 4.0 · Source · ⁨来源⁩
Rio de Janeiro Favela, Rio de Janeiro State, Brazil 02

Wilfredor · CC0 · Source · ⁨来源⁩
Tokyo Shibuya Scramble Crossing 2018-10-09

Benh LIEU SONG (Flickr) · CC BY-SA 2.0 · Source · ⁨来源⁩

07 · 工业与经济发展的格局与过程

Container ship NYK Themis at the Port of Los Angeles

Downtowngal · CC BY-SA 4.0 · Source · ⁨来源⁩
FANUC 6-axis welding robots

Phasmatisnox · CC BY 3.0 · Source · ⁨来源⁩
Paneles solares en Cariñena, España, 2015-01-08, DD 08

Diego Delso · CC BY-SA 4.0 · Source · ⁨来源⁩
Container ship NYK Themis at the Port of Los Angeles

Downtowngal · CC BY-SA 4.0 · Source · ⁨来源⁩

AP Macroeconomics · ⁨AP 宏观经济学⁩

01 · 基本经济概念

Bingham Canyon Open Pit Copper Mine 2012-09-17 21-25-59

Jet6581 · CC BY-SA 3.0 · Source · ⁨来源⁩
DFC 2094 Evening buzz at a busy night market - food stalls colorful lights and people strolling through the crowded aisle

PattayaPatrol · CC BY-SA 4.0 · Source · ⁨来源⁩
Aerial image of the Bremerhaven container terminal (view from the southeast)

Carsten Steger · CC BY-SA 4.0 · Source · ⁨来源⁩

02 · 经济指标与经济周期

Vatican Museum Queue - April 2007

Diliff · CC BY-SA 3.0 · Source · ⁨来源⁩
Aisle in Daily Market Groceries Canberra City October 2025

Nick-D · CC BY-SA 4.0 · Source · ⁨来源⁩

03 · 国民收入与价格决定

Port Qasim Coal Power Plant, 08.06.2021

VileGecko · CC BY-SA 4.0 · Source · ⁨来源⁩
Central Business District skyline, Singapore, at night

Andrew McMillan · Public domain · Source · ⁨来源⁩

04 · 金融部门

Euro Series Banknotes (2019)

PawełMM · CC BY-SA 3.0 · Source · ⁨来源⁩
Trading floor of the New York Stock Exchange, New York City LCCN2011632435

Carol M. Highsmith · Public domain · Source · ⁨来源⁩
Bank of England Building, London, UK - Diliff

Diliff · CC BY-SA 3.0 · Source · ⁨来源⁩

05 · 稳定政策的长期影响

Hungarian Parliament Building 1

kallerna · CC BY-SA 4.0 · Source · ⁨来源⁩
Wind turbines (Adair Wind Farm, Iowa, USA) 6 (48916254952)

James St. John · CC BY 2.0 · Source · ⁨来源⁩
Euro Series Banknotes (2019)

PawełMM · CC BY-SA 3.0 · Source · ⁨来源⁩
Trading floor of the New York Stock Exchange, New York City LCCN2011632435

Carol M. Highsmith · Public domain · Source · ⁨来源⁩

06 · 开放经济——国际贸易与金融

Currency Exchange - Moldova (by David Stanley)

D-Stanley · CC BY 2.0 · Source · ⁨来源⁩
Aerial image of the Bremerhaven container terminal (view from the southeast)

Carsten Steger · CC BY-SA 4.0 · Source · ⁨来源⁩

AP Microeconomics · ⁨AP 微观经济学⁩

01 · 基本经济概念

Outdoor market fruit and vegetable stall Market Place Romford London 01

Acabashi · CC BY-SA 4.0 · Source · ⁨来源⁩
Aerial image of the Bremerhaven container terminal (view from the southeast)

Carsten Steger · CC BY-SA 4.0 · Source · ⁨来源⁩

02 · 供给与需求

Fruit and vegetable stall at Southside Farmers Market November 2025

Nick-D · CC BY-SA 4.0 · Source · ⁨来源⁩
DFC 2094 Evening buzz at a busy night market - food stalls colorful lights and people strolling through the crowded aisle

PattayaPatrol · CC BY-SA 4.0 · Source · ⁨来源⁩

03 · 生产、成本与完全竞争模型

Robot arm picks up cylindrical objects in a factory setting

Shixart1985 · CC BY 2.0 · Source · ⁨来源⁩
ArcelorMittal steel plant on the Cuyahoga River

Roy Luck · CC BY 2.0 · Source · ⁨来源⁩

04 · 不完全竞争

001 Car factory assembly line - Opel factory in Gliwice, Poland

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨来源⁩
Port Qasim Coal Power Plant, 08.06.2021

VileGecko · CC BY-SA 4.0 · Source · ⁨来源⁩

05 · 要素市场

Garment factory in Bangladesh Women working

Tareq Salahuddin from Dhaka, Bangladesh · CC BY 2.0 · Source · ⁨来源⁩
001 Car factory assembly line - Opel factory in Gliwice, Poland

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨来源⁩

06 · 市场失灵与政府的作用

Bonus Cigarettes

Antonio Kless · CC BY-SA 4.0 · Source · ⁨来源⁩
Rio de Janeiro Favela, Rio de Janeiro State, Brazil 01

Wilfredor · CC0 · Source · ⁨来源⁩
Port Qasim Coal Power Plant, 08.06.2021

VileGecko · CC BY-SA 4.0 · Source · ⁨来源⁩
Bielsko-Biała, ulica Warszawska, korek 02

Kamil Czaiński · CC BY-SA 4.0 · Source · ⁨来源⁩

AP Physics 1 · ⁨AP 物理 1⁩

01 · 运动学

SNCF TGV Duplex Viaduc de Cize - Bolozon

Kabelleger / David Gubler (http://www.bahnbilder.ch) · CC BY-SA 3.0 · Source · ⁨来源⁩
Car speedometer

Chenspec · CC BY-SA 4.0 · Source · ⁨来源⁩

02 · 力与平动动力学

Space Shuttle Columbia launching

NASA · Public domain · Source · ⁨来源⁩
Group of Skydivers in Freefall Formation at Sunset

Rstpch · CC BY-SA 4.0 · Source · ⁨来源⁩

03 · 功、能与功率

First drop of Leviathan

K2HWY · CC BY 4.0 · Source · ⁨来源⁩
00 1838 Iguazu Falls from the Brazilian side

W. Bulach · CC BY-SA 4.0 · Source · ⁨来源⁩

04 · 线动量

Newton's Cradle

AntHolnes · CC BY-SA 3.0 · Source · ⁨来源⁩

05 · 力矩与转动动力学

SpringHandExerciser

Simon Speed · Public domain · Source · ⁨来源⁩
Crash test car from the West Germany USA zone before 120278145 (cropped)

Kalispera Dell · CC BY 3.0 · Source · ⁨来源⁩

06 · 转动系统的能量与动量

ISS Aug2005

NASA · Public domain · Source · ⁨来源⁩

07 · 振动

Tuning forks - Various frequencies

K.Venkataramana · CC0 · Source · ⁨来源⁩
SpringHandExerciser

Simon Speed · Public domain · Source · ⁨来源⁩

08 · 流体

Barometer, aneroid (AM 2014.62.1-3)

Sharman D. Neill Ltd · CC BY 4.0 · Source · ⁨来源⁩
Hydraulic jacks 8655

SwarmCheng · CC BY-SA 4.0 · Source · ⁨来源⁩

AP Physics 2 · ⁨AP 物理 2⁩

09 · 热力学

Hot air balloon IMGP0344a

Alexey V. Kurochkin · CC BY-SA 4.0 · Source · ⁨来源⁩
Glacial iceberg in Argentina

IlyaHaykinson · CC BY 2.0 · Source · ⁨来源⁩

10 · 电力、电场与电势

Port and lighthouse overnight storm with lightning in Port-la-Nouvelle

Maxime Raynal from France · CC BY 2.0 · Source · ⁨来源⁩
Muller Van de Graaff generator demonstration

Drbaker171 at English Wikipedia · Public domain · Source · ⁨来源⁩

11 · 电路

ESP-01 WiFi Breadboard Project

RetroEditor · CC BY-SA 4.0 · Source · ⁨来源⁩
Rigol DS1054Z digital oscilloscope

Rigol · Product image · Source · ⁨来源⁩
Power lines in Stueng Hav District

Dmitry Makeev · CC BY-SA 4.0 · Source · ⁨来源⁩

12 · 磁学与电磁学

Bar-magnet-iron-filings max

MikeRun, Vera Wurmsdobler · CC BY-SA 4.0 · Source · ⁨来源⁩
Aurora borealis over Eielson Air Force Base, Alaska

United States Air Force photo by Senior Airman Joshua Strang · Public domain · Source · ⁨来源⁩
Muurame electrical substation transformer

Antti Leppänen · CC BY 4.0 · Source · ⁨来源⁩
Openstax college-physics 22.10 ironfilings-coil-magnet

OpenStax · CC BY 4.0 · Source · ⁨来源⁩

13 · 几何光学

Convex lens (magnifying glass) and upside-down image

AntanO · CC BY-SA 4.0 · Source · ⁨来源⁩
DispersionPrisme

Kilohn limahn · CC BY-SA 4.0 · Source · ⁨来源⁩

14 · 波、声音与物理光学

Diffraction CD

Zykov S · CC BY 4.0 · Source · ⁨来源⁩
Two-point-interference-ripple-tank

The original uploader was RenamedUser2 at English Wikipedia · BSD · Source · ⁨来源⁩

15 · 近代物理

Hydrogen spectrum visible

McZusatz (talk) · CC0 · Source · ⁨来源⁩
Particle Tracks in AWAN Expansion Cloud Chamber

Kebuk awan · CC BY-SA 4.0 · Source · ⁨来源⁩
De Molen (windmill) and the nuclear power plant cooling tower in Doel, Belgium (DSCF3859)

Trougnouf · CC BY 4.0 · Source · ⁨来源⁩

AP Physics C: Electricity and Magnetism · ⁨AP 物理 C：电磁学⁩

08 · 电荷、电场与高斯定律

OneTeslaTS DRSSTC Tesla Coil closeup

Original image: OneTesla Derived image: Chetvorno · CC BY-SA 4.0 · Source · ⁨来源⁩
Muller Van de Graaff generator demonstration

Drbaker171 at English Wikipedia · Public domain · Source · ⁨来源⁩

09 · 电势

Power lines in Stueng Hav District

Dmitry Makeev · CC BY-SA 4.0 · Source · ⁨来源⁩

10 · 导体与电容器

Capacitors Various

Intiti · Public domain · Source · ⁨来源⁩
Electrolytic capacitors mounted on a circuit board

Giovanna 27 · CC BY 4.0 · Source · ⁨来源⁩

11 · 电路

ESP-01 WiFi Breadboard Project

RetroEditor · CC BY-SA 4.0 · Source · ⁨来源⁩
Rigol DS1054Z digital oscilloscope

Rigol · Product image · Source · ⁨来源⁩

12 · 磁场与电磁学

Openstax college-physics 22.10 ironfilings-coil-magnet

OpenStax · CC BY 4.0 · Source · ⁨来源⁩
Aurora borealis over Eielson Air Force Base, Alaska

United States Air Force photo by Senior Airman Joshua Strang · Public domain · Source · ⁨来源⁩

13 · 电磁感应

Electric Motor Rotor

Richard Wheeler (Zephyris) · CC BY-SA 3.0 · Source · ⁨来源⁩
Muurame electrical substation transformer

Antti Leppänen · CC BY 4.0 · Source · ⁨来源⁩

AP Physics C: Mechanics · ⁨AP 物理 C：力学⁩

01 · 运动学

SNCF TGV Duplex Viaduc de Cize - Bolozon

Kabelleger / David Gubler (http://www.bahnbilder.ch) · CC BY-SA 3.0 · Source · ⁨来源⁩
Car speedometer

Chenspec · CC BY-SA 4.0 · Source · ⁨来源⁩

02 · 力与平动动力学

Space Shuttle Columbia launching

NASA · Public domain · Source · ⁨来源⁩
Group of Skydivers in Freefall Formation at Sunset

Rstpch · CC BY-SA 4.0 · Source · ⁨来源⁩

03 · 功、能与功率

First drop of Leviathan

K2HWY · CC BY 4.0 · Source · ⁨来源⁩

04 · 线动量

Newton's Cradle

AntHolnes · CC BY-SA 3.0 · Source · ⁨来源⁩

05 · 力矩与转动动力学

Gear train

Robbie Sproule from Montreal, Canada · CC BY 2.0 · Source · ⁨来源⁩
Analytical beam balance - Upper part of high precision mechanical analytical scales

Sergei Golyshev · CC BY-SA 2.0 · Source · ⁨来源⁩

06 · 转动系统的能量与动量

Kimmy Repond (born 18 October 2006), Swiss figure skater, at Art on Ice 2026 in Zurich. DSC05240

Skyscraper2010 · CC BY-SA 4.0 · Source · ⁨来源⁩

07 · 振动

Saint Isaac's Cathedral - Foucault pendulum in 1984

This photo is a scanned Reversal film (Slide) · CC BY-SA 4.0 · Source · ⁨来源⁩

AP Precalculus · ⁨AP 预备微积分⁩

01 · 多项式函数与有理函数

Golden Gate Bridge on a clear day

Ariel E Barry · CC BY-SA 3.0 · Source · ⁨来源⁩
GoldenGateBridge-001

Rich Niewiroski Jr · CC BY 2.5 · Source · ⁨来源⁩
Antena parabólica

Rjcastillo · CC BY-SA 3.0 · Source · ⁨来源⁩

02 · 指数函数与对数函数

800metresOlympicTrials2020

jenaragon94 · CC BY 2.0 · Source · ⁨来源⁩
Matryoshka dolls - Bor local museum

Лапоть · CC0 · Source · ⁨来源⁩
EscherichiaColi NIAID

NIAID · Public domain · Source · ⁨来源⁩

03 · 三角函数与极坐标函数

Giant Ferris Wheel Vienna from W on 2010-09-20

Robert F. Tobler · CC BY-SA 4.0 · Source · ⁨来源⁩
International Space Station after undocking of STS-132

NASA/Crew of STS-132 · Public domain · Source · ⁨来源⁩

04 · 涉及参数、向量与矩阵的函数

Cedar Point Rougarou cars on loop track (2859)

Bobby Proffer · CC BY-SA 3.0 · Source · ⁨来源⁩
EllipticalOrbits

AstroOgier · CC0 · Source · ⁨来源⁩

AP Psychology · ⁨AP 心理学⁩

01 · 行为的生物学基础

Blausen 0111 BrainLobes

BruceBlaus. When using this image in external sources it can be cited as: Blausen.com staff (2014). "Medical gallery of Blausen Medical 2014". WikiJournal of Medicine 1 (2). DOI:10.15347/wjm/2014.010. ISSN 2002-4436 · CC BY 3.0 · Source · ⁨来源⁩
Wired up for a sleep study 02A

Joe Mabel · CC BY-SA 3.0 · Source · ⁨来源⁩

AP Statistics · ⁨AP 统计学⁩

03 · 收集数据

Clinical trial

Fatemi.ebr · CC BY-SA 4.0 · Source · ⁨来源⁩
Dice (typical role playing game dice)

Stephantom · CC BY-SA 3.0 · Source · ⁨来源⁩
Amboy (California, USA), Hist. Route 66 -- 2012 -- 1

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨来源⁩

04 · 概率、随机变量与概率分布

Ace playing cards

Enoch Lau · CC BY-SA 3.0 · Source · ⁨来源⁩

07 · 定量数据的推断：均值

Dice (typical role playing game dice)

Stephantom · CC BY-SA 3.0 · Source · ⁨来源⁩

08 · 分类数据的推断：卡方

OpenOffice.org Calc

http://hacktolive.org/ · LGPL · Source · ⁨来源⁩

09 · 定量数据的推断：斜率

Linear regression

Sewaqu · Public domain · Source · ⁨来源⁩
Residual plots for linear regression conditions

eXercise project · CC0 · Source · ⁨来源⁩

AP United States History · ⁨AP 美国历史⁩

01 · 第一时期：1491—1607

Monks Mound - Summer 2024

Skubasteve834 · CC BY 4.0 · Source · ⁨来源⁩
Cliff Palace-Colorado-Mesa Verde NP

Tobi 87 · CC BY-SA 4.0 · Source · ⁨来源⁩

06 · 第六时期：1865—1898

Bessemer converter Blowing

Borvan53 · Public domain · Source · ⁨来源⁩

07 · 第七时期：1890—1945

Assembly line Ford T, 1923

Peter Elfelt · CC BY-SA 4.0 · Source · ⁨来源⁩
Dust bowl, Texas Panhandle, TX fsa.8b27276 edit

Arthur Rothstein · Public domain · Source · ⁨来源⁩

09 · 第九时期：1980年至今

Container Terminal Tollerort, Vorhafen, Hamburg (P1080405)

Matti Blume · CC BY-SA 4.0 · Source · ⁨来源⁩

AP World History: Modern · ⁨AP 世界历史：现代⁩

01 · 全球织锦

Great-Zimbabwe-ruins-outer-walls-3-1200

Edwin Smith and Andrew Dale · CC BY-SA 4.0 · Source · ⁨来源⁩

02 · 交流网络

Inhambane-dhow

—Steven G. Johnson · CC BY-SA 3.0 · Source · ⁨来源⁩

03 · 陆基帝国

Mezquita de Solimán, Estambul, Turquía, 2024-09-28, DD 147-149 HDR

Diego Delso · CC BY-SA 4.0 · Source · ⁨来源⁩
Taj Mahal, Agra, India edit2

Yann; edited by King of Hearts · CC BY-SA 4.0 · Source · ⁨来源⁩

04 · 跨洋联系

Cerro Rico, Potosí, Bolivia

Jbmurray · CC BY-SA 4.0 · Source · ⁨来源⁩
Barcelona - Replica of Santa Maria Caravel

Unknown author · Public domain · Source · ⁨来源⁩

05 · 革命

Boulton & Watt steam engine, Sydney Powerhouse Museum, 2014 (15243331353)

David Maciulaitis from Auckland, New Zealand · CC BY 2.0 · Source · ⁨来源⁩

IGCSE Biology · ⁨IGCSE 生物⁩

01 · 生物的特征与分类

E. coli bacteria (SEM)

NIAID · CC BY 2.0 · Source · ⁨来源⁩
Fly agaric mushroom

Onderwijsgek · CC BY-SA 3.0 nl · Source · ⁨来源⁩
Entomologie Hamburg

Hanse hiwi · CC BY-SA 4.0 · Source · ⁨来源⁩

02 · 生物体的组成

Onion epidermis cells (light micrograph, 40x)

loganrickert · CC BY 2.0 · Source · ⁨来源⁩
Compound light microscope

GcG(jawp) · Public domain · Source · ⁨来源⁩

03 · 物质进出细胞

Plasmolysis in red onion cells

Trương Minh Khải · CC BY 4.0 · Source · ⁨来源⁩
Human blood

Olena Hohulia, Куцик Влада, Кремінь Валентина, Ivanchik Marya · CC BY 4.0 · Source · ⁨来源⁩

04 · 生物分子

Potato starch grains (light micrograph)

MarekMiś · CC BY 4.0 · Source · ⁨来源⁩
Fresh made bread 05

FranHogan · CC BY-SA 4.0 · Source · ⁨来源⁩
Benedict precipitate 20211012 093950

HunterRSC · CC0 · Source · ⁨来源⁩

05 · 酶

Detergent - Persil Megaperls 02

Kritzolina · CC BY-SA 4.0 · Source · ⁨来源⁩
Kiwi (Actinidia chinensis) 1 Luc Viatour

Luc Viatour · CC BY-SA 2.5 · Source · ⁨来源⁩

06 · 植物的营养

Stomata in a leaf (light micrograph, 400x)

ChrisInMilton · CC BY-SA 4.0 · Source · ⁨来源⁩
Sunlight on a green leaf (India, 2016)

Aurr123 · CC BY-SA 4.0 · Source · ⁨来源⁩
Chloroplasts in moss leaf cells (light micrograph)

Kristian Peters -- Fabelfroh · CC BY-SA 3.0 · Source · ⁨来源⁩

07 · 人体的营养

Types of teeth

http://www.scientificanimations.com/ · CC BY-SA 4.0 · Source · ⁨来源⁩
Fresh Vegetables display in Iloilo Terminal Public Market 06

OnlyJanz · CC BY-SA 4.0 · Source · ⁨来源⁩

08 · 植物体内的运输

Dicot stem cross-section (light micrograph)

User:Micropix · CC BY-SA 3.0 · Source · ⁨来源⁩
Tall oak by Myrstigen

W.carter · CC BY-SA 4.0 · Source · ⁨来源⁩

09 · 动物体内的运输

Blood cells (scanning electron micrograph)

Bruce Wetzel and Harry Schaefer (National Cancer Institute) · Public domain · Source · ⁨来源⁩
Dresden, Deutsches Hygiene-Museum, anatomisches Modell, Herz

Dguendel · CC BY 4.0 · Source · ⁨来源⁩

10 · 疾病与免疫

White blood cell engulfing bacteria

National Institutes of Health (NIH) · Public domain · Source · ⁨来源⁩
Mosquito (Ochlerotatus annulipes) and Midge (Culicoides impunctatus) biting human (me)

Dunpharlain · CC BY-SA 4.0 · Source · ⁨来源⁩

11 · 人体的气体交换

3d model of lungs airways ribs

Eboelen (talk) (Uploads) · CC0 · Source · ⁨来源⁩
Respiratory system complete (en)

LadyofHats, Jmarchn · Public domain · Source · ⁨来源⁩

12 · 呼吸作用

Finish of sprint running, 1992 Paralympics

Norman Bailey/Australian Paralympic Committee · CC BY-SA 3.0 · Source · ⁨来源⁩
Berlin-Marathon 2015 Runners 14

Denis Barthel · CC BY-SA 4.0 · Source · ⁨来源⁩

13 · 人体的排泄

Haemodialysis machine

Виталий Поспелов at ru.wikipedia · CC BY-SA 3.0 · Source · ⁨来源⁩
Kidney section vertical

Henry Vandyke Carter · Public domain · Source · ⁨来源⁩

14 · 协调与反应

Iris Macro, Eye close-up (11622304153)

Matt Ming from Beijing, China · CC BY 2.0 · Source · ⁨来源⁩
BrainLobesLabelled

Camazine · CC BY 3.0 · Source · ⁨来源⁩
Neuron - Nerve Cell 01

Doctor Jana · CC BY 4.0 · Source · ⁨来源⁩

15 · 药物

Antibiotic sensitivity test

Dr Graham Beards · CC BY-SA 4.0 · Source · ⁨来源⁩
Bonus Cigarettes

Antonio Kless · CC BY-SA 4.0 · Source · ⁨来源⁩

16 · 生殖

Pollen grains (SEM)

Asja Radja · CC BY 4.0 · Source · ⁨来源⁩
Lily flower: stamens and stigma

Subhrajyoti07 · CC BY-SA 4.0 · Source · ⁨来源⁩
A bee on a yellow flower

Iurie Nistor · CC0 · Source · ⁨来源⁩

17 · 遗传

Human karyotype diagram showing autosomes and sex chromosomes - NHGRI

National Human Genome Research Institute (NHGRI) · Public domain · Source · ⁨来源⁩
DNA Double Helix by NHGRI

National Human Genome Research Institute · Public domain · Source · ⁨来源⁩

18 · 变异与选择

Peppered moth: dark (melanic) form

Chiswick Chap · CC BY-SA 3.0 · Source · ⁨来源⁩
Corner of Stockton and Jackson Street, crowd, San Francisco (April 2007)

Jennifer Woodard Maderazo · CC BY 2.0 · Source · ⁨来源⁩
Camel in Gobi Desert 01

Bernard Gagnon · CC0 · Source · ⁨来源⁩
20180124-OSEC-PJK-1132 TONED (39891696481)

U.S. Department of Agriculture Preston Keres/Office of Communications-Photography Services Center · Public domain · Source · ⁨来源⁩

19 · 生物与环境

Coral reef ecosystem

Jim E Maragos, U.S. Fish and Wildlife Service · Public domain · Source · ⁨来源⁩
African savanna elephants at Saadani National Park Tanzania

Rasheedhrasheed · CC BY-SA 4.0 · Source · ⁨来源⁩

20 · 人类对生态系统的影响

004 Beach pollution in Tenerife - Atlantic Ocean beach plastic garbage debris

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨来源⁩
Deforested area, Goldisthal, 2023-05-20

Radomianin · CC BY-SA 4.0 · Source · ⁨来源⁩
Giant panda eating bamboo

Kevin Dooley · CC BY 2.0 · Source · ⁨来源⁩

21 · 生物技术与基因改造

Tanks at Green Leaf brewery

Ruth Hartnup from Vancouver, Canada · CC BY 2.0 · Source · ⁨来源⁩
Gel electrophoresis 2

Mnolf · CC BY-SA 3.0 · Source · ⁨来源⁩

IGCSE Business Studies · ⁨IGCSE 商业研究⁩

01 · 理解商业活动

Retail outlets, High Street - geograph.org.uk - 7644448

John Baker · CC BY-SA 2.0 · Source · ⁨来源⁩
Bonn, Post-Tower -- 2017 -- 2128 (bw)

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨来源⁩

02 · 企业中的人

Meeting British business representatives (5430620349)

Foreign and Commonwealth Office · OGL v1.0 · Source · ⁨来源⁩
Alpha Factory-Sewing Floor 80-90

Alan D Cirker · CC BY 3.0 · Source · ⁨来源⁩

03 · 市场营销

A John Lewis Partnership shop window (8734849424)

Tyne & Wear Archives & Museums · No restrictions · Source · ⁨来源⁩
Times square at night

Rafi B. from Somewhere in Texas :) · CC BY 2.0 · Source · ⁨来源⁩

04 · 运营管理

Assembly line

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨来源⁩
Daiwa Logistics Tosu Logistics Center

Peka · CC BY-SA 4.0 · Source · ⁨来源⁩
BMW Leipzig MEDIA 050719 Download Karosseriebau max

BMW Werk Leipzig · CC BY-SA 2.0 de · Source · ⁨来源⁩

05 · 财务信息与决策

Exterior of a modern Wells Fargo bank branch in Athens, Georgia 01

Harrison Keely · CC BY 4.0 · Source · ⁨来源⁩
Andrew Aziz

Bear Bull Traders · CC BY 2.0 · Source · ⁨来源⁩
Trading floor of the New York Stock Exchange, New York City LCCN2011632435

Carol M. Highsmith · Public domain · Source · ⁨来源⁩

06 · 影响商业活动的外部因素

Shipping containers at West Harbour in Jätkäsaari, Helsinki, Finland, 2008 October

Kari Hakli · CC BY-SA 4.0 · Source · ⁨来源⁩
Brayton Point Cooling Towers

Wikimaster97commons · CC BY-SA 3.0 · Source · ⁨来源⁩
Hungarian Parliament Building 1

kallerna · CC BY-SA 4.0 · Source · ⁨来源⁩

IGCSE Chemistry · ⁨IGCSE 化学⁩

01 · 物质的状态

Iodine subliming

Kate7234 · CC0 · Source · ⁨来源⁩
Ice cubes openphoto

Darren Hester · CC BY-SA 2.5 · Source · ⁨来源⁩
DryIceSublimation

Sarathtly · Public domain · Source · ⁨来源⁩

02 · 原子、元素与化合物

Vanadium crystal bar and 1cm3 cube

Alchemist-hp (pse-mendelejew.de) · FAL · Source · ⁨来源⁩
Water-3D-balls-A

Ben Mills · Public domain · Source · ⁨来源⁩
Halit (NaCl) - Kopalnia soli Wieliczka, Polska

Lech Darski · CC BY-SA 4.0 · Source · ⁨来源⁩
Graphite found near Mautern

Kritzolina · CC BY-SA 4.0 · Source · ⁨来源⁩

03 · 化学计量

Acid and Base Titration

Kengksn · CC BY-SA 4.0 · Source · ⁨来源⁩
Analytical balance mettler ae-260

US DEA · Public domain · Source · ⁨来源⁩

04 · 电化学

Electrolysis of water

Rhetos · CC0 · Source · ⁨来源⁩
Hofmann'scher Wasserzersetzungsapparat - Deutsches Museum Verkehrszentrum

Mattes · CC BY-SA 3.0 · Source · ⁨来源⁩

05 · 化学能量学

Campfires burning wood pits

Jon Sullivan · Public domain · Source · ⁨来源⁩
Bunsen burner flame types

Arthur Jan Fijałkowski · CC BY-SA 3.0 · Source · ⁨来源⁩
Bunsen burner flame types

Arthur Jan Fijałkowski · CC BY-SA 3.0 · Source · ⁨来源⁩

06 · 化学反应

Rust on iron

Laitr Keiows · CC BY-SA 3.0 · Source · ⁨来源⁩
Potassium permanganate solutions 2

Leiem · CC BY-SA 4.0 · Source · ⁨来源⁩

07 · 酸、碱与盐

Copper sulphate (48723408188)

Auckland Museum Collections from Auckland, Aotearoa New Zealand · CC BY 2.0 · Source · ⁨来源⁩
Blue and red litmus paper

Meganbeckett27 · CC BY-SA 3.0 · Source · ⁨来源⁩
PH Test Strips

Ajay Kumar Chaurasiya · CC BY-SA 4.0 · Source · ⁨来源⁩
Limestone Cliffs, Little Ormes Head - geograph.org.uk - 7808316

N Chadwick · CC BY-SA 2.0 · Source · ⁨来源⁩

08 · 元素周期表

Potassium reacting with water

Tavoromann · CC BY-SA 3.0 · Source · ⁨来源⁩
Periodic table HMNS

Ed Uthman, Houston, Texas, USA · CC BY 3.0 · Source · ⁨来源⁩
Coloured-transition-metal-solutions

No machine-readable author provided. Benjah-bmm27 assumed (based on copyright claims) · Public domain · Source · ⁨来源⁩
Edelgase in Entladungsroehren

Alchemist-hp www.pse-mendelejew.de · CC BY-SA 2.0 de · Source · ⁨来源⁩

09 · 金属

Rusted iron chain

MX1996 · CC BY-SA 4.0 · Source · ⁨来源⁩
Cathay Pacific A350-941 preparing to takeoff on runway 25L@HKG

BenYung0531 · CC BY-SA 4.0 · Source · ⁨来源⁩
Rusted top edge grey heavily worn deteriorating grubby grungy aged metal surface texture

Sisters.seamless · CC0 · Source · ⁨来源⁩
Copper (29 Cu)

Hi-Res Images of Chemical Elements · CC BY 3.0 · Source · ⁨来源⁩

10 · 环境化学

Inside a catalytic converter

Cyrogigabyte · CC0 · Source · ⁨来源⁩
Smog over Almaty

Igors Jefimovs · CC BY 3.0 · Source · ⁨来源⁩

11 · 有机化学

Anacortes Refinery 31911

Walter Siegmund (talk) · CC BY 2.5 · Source · ⁨来源⁩
004 Beach pollution in Tenerife - Atlantic Ocean beach plastic garbage debris

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨来源⁩

12 · 实验技术与化学分析

Paper chromatography

Yuliiaoleksii · CC BY 4.0 · Source · ⁨来源⁩
Acid-base titration

Alina.Popova.26 · CC BY 4.0 · Source · ⁨来源⁩

IGCSE Computer Science · ⁨IGCSE 计算机科学⁩

01 · 数据表示

Die (the 'heart') of a microprocessor Intel 80486 with 1.2 millions of transistors, ca. 1990

Thomy pc at German Wikipedia · Public domain · Source · ⁨来源⁩
Binary-code

Graph+sas · CC BY-SA 4.0 · Source · ⁨来源⁩
Hard disk platters and head

Mfield, Matthew Field, http://www.photography.mattfield.com · CC BY-SA 3.0 · Source · ⁨来源⁩

02 · 数据传输

USB connectors

Techtonic · Public domain · Source · ⁨来源⁩
An Ethernet cable

No machine-readable author provided. David.Monniaux assumed (based on copyright claims) · CC BY-SA 3.0 · Source · ⁨来源⁩
Fiber optic illuminated

Hustvedt · CC BY-SA 3.0 · Source · ⁨来源⁩

03 · 硬件

Inside a hard disk drive

Zzubnik · Public domain · Source · ⁨来源⁩
A solid state drive

PantheraLeo1359531 · CC BY 4.0 · Source · ⁨来源⁩
An optical disc

· Public domain · Source · ⁨来源⁩
A USB flash drive

Dmitry Makeev · CC BY-SA 4.0 · Source · ⁨来源⁩
A magnetic tape cartridge

Mister rf · CC BY-SA 4.0 · Source · ⁨来源⁩
Logitech K120 USB keyboard

Logitech · Product image · Source · ⁨来源⁩
Logitech M100 optical mouse

Logitech · Product image · Source · ⁨来源⁩
Honeywell Voyager 1250g barcode scanner

Honeywell · Product image · Source · ⁨来源⁩
Epson Perfection V39 II flatbed scanner

Epson · Product image · Source · ⁨来源⁩
Brother HL-L2400D laser printer

Brother · Product image · Source · ⁨来源⁩
Bambu Lab X1 Carbon with AMS module (cropped)

Benlisquare · CC BY-SA 4.0 · Source · ⁨来源⁩
Canon PIXMA TS3520 inkjet printer

Canon · Product image · Source · ⁨来源⁩
Logitech Z313 computer speakers

Logitech · Product image · Source · ⁨来源⁩
Samsung 24-inch monitor

Samsung · Product image · Source · ⁨来源⁩
Logitech Yeti USB microphone

Logitech · Product image · Source · ⁨来源⁩
Logitech H390 headset

Logitech · Product image · Source · ⁨来源⁩
Samsung Galaxy Tab A9 tablet

Samsung · Product image · Source · ⁨来源⁩
Corsair Vengeance DDR5 RAM module

Corsair · Product image · Source · ⁨来源⁩
Intel CPU Core i7 6700K Skylake top

Eric Gaba (Sting - fr:Sting) · CC BY-SA 4.0 · Source · ⁨来源⁩
Electronic-Component-Screw-DC-Motor

Evan-Amos · Public domain · Source · ⁨来源⁩
AM2302 (DHT22) digital temperature and humidity sensor module

Suyash Dwivedi · CC BY-SA 4.0 · Source · ⁨来源⁩
Navigon Canada 310 - board-40222

Raimond Spekking · CC BY-SA 4.0 · Source · ⁨来源⁩
Nikon D850 digital single-lens reflex camera

G1MFG · CC BY-SA 4.0 · Source · ⁨来源⁩
Datacenter Server Racks (22370909788)

Carl Lender from Sunrise, USA · CC BY 2.0 · Source · ⁨来源⁩
Netgear-Nighthawk-AC1900-WiFi-Router

Evan-Amos · Public domain · Source · ⁨来源⁩

04 · 软件

Computer motherboard 6

Kurt Kaiser · CC0 · Source · ⁨来源⁩
Fedora 33 with its default desktop environment (GNOME 3.38) and background

GNOME · GPL · Source · ⁨来源⁩
Screen-python-code-matplotlib-physics-simulation

MikeRun · CC BY-SA 4.0 · Source · ⁨来源⁩

05 · 互联网及其应用

A home Wi-Fi router

Evan-Amos · Public domain · Source · ⁨来源⁩
A data centre

BalticServers.com · CC BY-SA 3.0 · Source · ⁨来源⁩
Padlock 7642

ImagePerson · CC BY-SA 4.0 · Source · ⁨来源⁩

06 · 自动化与新兴技术

An industrial robot arm

Нечаева Лилия Александровна · CC BY-SA 4.0 · Source · ⁨来源⁩
A drone

Josh Sorenson · CC0 · Source · ⁨来源⁩
Mi Robot Vacuum

Popey900 · Copyrighted free use · Source · ⁨来源⁩
Waymo Jaguar I-Pace - Side View 01

9yz · CC BY 4.0 · Source · ⁨来源⁩

07 · 算法设计与问题求解

programmer

hackNY · CC BY-SA 2.0 · Source · ⁨来源⁩

08 · 程序设计

Screen-python-code-matplotlib-physics-simulation

MikeRun · CC BY-SA 4.0 · Source · ⁨来源⁩
168 pin and 184 pin DIMM

Veeblefetzer · CC BY 4.0 · Source · ⁨来源⁩

09 · 数据库

Schlagwortkatalog

Dr. Marcus Gossler · CC BY-SA 3.0 · Source · ⁨来源⁩
NOIRLab HQ Server Racks (6V6A0395-CC)

NOIRLab/NSF/AURA/T. Slovinský · CC BY 4.0 · Source · ⁨来源⁩

10 · 布尔逻辑

A logic gate chip

S. Kaba · Public domain · Source · ⁨来源⁩
ESP-01 WiFi Breadboard Project

RetroEditor · CC BY-SA 4.0 · Source · ⁨来源⁩

IGCSE Economics · ⁨IGCSE 经济学⁩

01 · 基本经济问题

DFC 2094 Evening buzz at a busy night market - food stalls colorful lights and people strolling through the crowded aisle

PattayaPatrol · CC BY-SA 4.0 · Source · ⁨来源⁩
Farmland near Bradeley Green in Cheshire - geograph.org.uk - 5271496

Roger Kidd · CC BY-SA 2.0 · Source · ⁨来源⁩

02 · 资源的配置

Factory smoke in sunset - geograph.org.uk - 1769920

Nic Franklin-Woolley · CC BY-SA 2.0 · Source · ⁨来源⁩
Andrew Aziz

Bear Bull Traders · CC BY 2.0 · Source · ⁨来源⁩

03 · 微观经济决策者

SPAR kolonial mat varehandel hyller (Supermarket interior GROCERY store aisle shelves) Frokostblandinger gryn müsli Axa frukt energi 4-korn blåbær (cereals muesli) etc Tjøme NORWAY 2023-08-31 IMG 1095

Wolfmann · CC BY-SA 4.0 · Source · ⁨来源⁩
001 Car factory assembly line - Opel factory in Gliwice, Poland

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨来源⁩
08 Philippine peso PHP currency - banknotes and coins of Philippine money

Marek Ślusarczyk (Tupungato) Photo portfolio · CC BY 3.0 · Source · ⁨来源⁩

04 · 政府与宏观经济

People's Bank of China (2006-02-18)

Yongxinge (Wikimedia Commons) · CC BY-SA 3.0 · Source · ⁨来源⁩
Shanghai skyline waterfront pudong 5166168 69 70

Ermell · CC0 · Source · ⁨来源⁩
Vatican Museum Queue - April 2007

Diliff · CC BY-SA 3.0 · Source · ⁨来源⁩

05 · 经济发展

Favelascape - Flickr - eflon

eflon from Ithaca, NY · CC BY 2.0 · Source · ⁨来源⁩
1 singapore city skyline dusk panorama 2011

chenisyuan · CC BY-SA 4.0 · Source · ⁨来源⁩

06 · 国际贸易与全球化

Container port

H. Zell · CC BY-SA 3.0 · Source · ⁨来源⁩
Port bow view of the Russian merchant container ship CHITA underway. The ship has numerous commercial vehicles as deck cargo - DPLA - e120d3e0e4cf053032385cc8b2eca1fe

Department of Defense. American Forces Information Service. Defense Visual Information Center. 1994 · Public domain · Source · ⁨来源⁩

IGCSE English · ⁨IGCSE 英语⁩

01 · 阅读技能

Departure board at Geneva Airport

Tiia Monto · CC BY-SA 3.0 · Source · ⁨来源⁩
Close-up of a woman reading a book

Shixart1985 · CC BY 2.0 · Source · ⁨来源⁩

02 · 写作：目的、读者与准确性

Person writing in a notebook while sitting at a desk

Shixart1985 · CC BY 2.0 · Source · ⁨来源⁩

03 · 写非正式电子邮件

Person writing in notebook while using laptop at a modern workspace

Shixart1985 · CC BY 2.0 · Source · ⁨来源⁩
Berkawan dalam kesukaan

Yaradina · CC BY-SA 4.0 · Source · ⁨来源⁩

04 · 写正式信函或电子邮件

Handwritten Letter of Resignation

CIPHR Connect · CC BY 2.0 · Source · ⁨来源⁩
Clean minimalist office (Unsplash)

Roman Bozhko romanbozhko · CC0 · Source · ⁨来源⁩

05 · 写报告

Carlisle Indian School, Carlisle, Pa. Classroom debate by debating society LCCN2008675522

Johnston, Frances Benjamin, 1864-1952, photographer · Public domain · Source · ⁨来源⁩
Person writing in notebook while using laptop at a modern workspace

Shixart1985 · CC BY 2.0 · Source · ⁨来源⁩

06 · 写文章

Front Page of 2025 Atmore Advance

JMMediaGroup1 · CC BY-SA 4.0 · Source · ⁨来源⁩
Newspapers on a newsstand

Maksym Kozlenko · CC BY-SA 4.0 · Source · ⁨来源⁩

07 · 写评论

Theatre of young audience (16134553769)

Andrey Shalaev · CC BY 2.0 · Source · ⁨来源⁩
Earls Kitchen and Bar Miami Worldcenter Interior

KTamburello · CC BY 4.0 · Source · ⁨来源⁩

08 · 写议论文

Rammohun Library and Free Reading Room - Rare Books Collection (1)

Sumitsurai · CC BY-SA 4.0 · Source · ⁨来源⁩
Person writing in a notebook while sitting at a desk

Shixart1985 · CC BY 2.0 · Source · ⁨来源⁩

09 · 听力技能

Radio WWOZ New Orleans studio October 2009 01

Infrogmation of New Orleans · CC BY-SA 4.0 · Source · ⁨来源⁩
Students of Mary Lauren Brown in conversation about Bullying

Foundation Digital Schools Liberia · CC0 · Source · ⁨来源⁩

10 · 口语技能

Don Young speaking at Juneau-Douglas High School, 1972-1973 school year

Juneau-Douglas High School (or student class/group of the school), Juneau, Alaska · Public domain · Source · ⁨来源⁩
Students of Mary Lauren Brown in conversation about Bullying

Foundation Digital Schools Liberia · CC0 · Source · ⁨来源⁩

11 · 词汇与文本类型

Compact Oxford English Dictionary 2

Cullen328 · CC BY-SA 4.0 · Source · ⁨来源⁩

IGCSE Mathematics · ⁨IGCSE 数学⁩

01 · 数

Andromeda Galaxy (with h-alpha)

Adam Evans · CC BY 2.0 · Source · ⁨来源⁩
Sale sign in the shopping mall. Discount tag. Bangkok. (48087867208)

Artem Beliaikin from Moscow, Russia · CC BY 2.0 · Source · ⁨来源⁩

02 · 代数与图像

Romanesco broccoli fractals

Jon Sullivan · Public domain · Source · ⁨来源⁩
Kangji Suspension Bridge under clear sky on 16 January 2015

Jason · CC BY 2.0 · Source · ⁨来源⁩

03 · 坐标几何

Sustenpass, Kanton Uri

Philipp Ramseier · CC BY-SA 4.0 · Source · ⁨来源⁩
2010-365-251 The Bronx aerial view (4972664239)

cogdogblog · CC BY 2.0 · Source · ⁨来源⁩

04 · 几何

Symmetry of the Taj Mahal, Agra

Jonathan Freundlich · CC BY-SA 3.0 · Source · ⁨来源⁩
Matryoshka from Hungary

Wilfredor · CC0 · Source · ⁨来源⁩
Honeycomb - Flickr - Bistrosavage

Doug Bowman from DeKalb IL, USA · CC BY 2.0 · Source · ⁨来源⁩

05 · 测量

All Gizah Pyramids

Ricardo Liberato · CC BY-SA 2.0 · Source · ⁨来源⁩
Shipping container stacks - Port of Rotterdam - 2017 - 5

AgainErick · CC BY-SA 4.0 · Source · ⁨来源⁩

06 · 三角学

Tour Eiffel - 20150801 15h30 (10621)

Another one of my pictures: This photograph was taken by Medium69 (William Crochot) and released under the license stated below. You are free to use it for any purpose as long as you credit the author (William Crochot), the Source (Wikimedia Commons) and the license (CC-BY-SA 4.0) in close relation to the image. Please do not upload an updated image here without consultation with the Author. The author would like to make corrections only at his own source RAW. This ensures that the changes are preserved.Please if you think that any changes should be required, please inform the author.Otherwise you can upload a new image with a new name. Please use one of the templates derivative or extract · CC BY-SA 4.0 · Source · ⁨来源⁩
London Eye at sunset 2013-07-19

Bob Collowan · CC BY-SA 3.0 · Source · ⁨来源⁩

07 · 变换与向量

Sailboat with spinnaker 17RM0454

Ermell · CC BY-SA 4.0 · Source · ⁨来源⁩
WLA vanda Tiles with repeat pattern

Wikipedia Loves Art participant "VeronikaB" · CC BY 2.5 · Source · ⁨来源⁩

08 · 概率

Dice (typical role playing game dice)

Diacritica · CC BY-SA 3.0 · Source · ⁨来源⁩
Roulette wheel (5276348473)

Håkan Dahlström from Malmö, Sweden · CC BY 2.0 · Source · ⁨来源⁩

09 · 统计

Galton box

Exhibit made by Estes Objethos Atelier, photo by Rodrigo.Argenton · CC BY-SA 4.0 · Source · ⁨来源⁩
Crowd of People at Ridge, Shimla

Shimla Deities · CC BY 4.0 · Source · ⁨来源⁩

IGCSE Physics · ⁨IGCSE 物理⁩

01 · 运动、力与能量

Windmills D1-D4 (Thornton Bank)

Hans Hillewaert · CC BY-SA 4.0 · Source · ⁨来源⁩
Cedar Point Rougarou cars on loop track (2859)

Bobby Proffer · CC BY-SA 3.0 · Source · ⁨来源⁩
Hoover Dam, Nevada (Arizona-Nevada, USA), Staumauer -- 2012 -- 6102

Dietmar Rabich · CC BY-SA 4.0 · Source · ⁨来源⁩
Analytical balance mettler ae-260

US DEA · Public domain · Source · ⁨来源⁩
Glacial iceberg in Argentina

IlyaHaykinson · CC BY 2.0 · Source · ⁨来源⁩

02 · 热学

Mano en el espectro visible y en el infrarrojo térmico

Amfeli · CC BY 4.0 · Source · ⁨来源⁩
Steam-boiling green asparagus

W.carter · CC0 · Source · ⁨来源⁩
2023 Termometr kuchenny

Jacek Halicki · CC BY-SA 4.0 · Source · ⁨来源⁩

03 · 波

DispersionPrisme

Kilohn limahn · CC BY-SA 4.0 · Source · ⁨来源⁩
A bunch of optic fibres made of plastic

Amangeldyurazov · CC BY-SA 4.0 · Source · ⁨来源⁩
Convex lens (magnifying glass) and upside-down image

AntanO · CC BY-SA 4.0 · Source · ⁨来源⁩
USB microphone

Logitech · Product image · Source · ⁨来源⁩
Reflection of waves observed using a ripple tank.

Psgs123xyz (talk) (Uploads) · CC0 · Source · ⁨来源⁩

04 · 电与磁

Magnetic field pattern

Maciej J. Mrowinski · CC BY-SA 4.0 · Source · ⁨来源⁩
Pole mounted Transformer

Bidgee · CC BY 3.0 · Source · ⁨来源⁩
RCD Protection Consumer Dual Split-Load

Evry Electrical · CC BY 4.0 · Source · ⁨来源⁩
U.S. Department of Energy - Science - 271 031 001 (23897761873)

U.S. Department of Energy from United States · Public domain · Source · ⁨来源⁩
Logarex smart household electricity meter build year 2023

RobbieIanMorrison · CC BY 4.0 · Source · ⁨来源⁩
Commutator and brushes DC motor

Christian Kral · CC BY 4.0 · Source · ⁨来源⁩
Raitersaich SK DSC 0028

Simon Koopmann · CC BY-SA 3.0 de · Source · ⁨来源⁩
3 Resistors

Afrank99 · CC BY-SA 2.5 · Source · ⁨来源⁩

05 · 核物理

Doel nuclear power plant

Ad Meskens · CC BY-SA 3.0 · Source · ⁨来源⁩
Capt. Candice Adams Ismirle waits to receive a radiation treatment Oct. 22, 2013, at Walter Reed National Military Medical Center in Bethesda, Md

Staff Sgt. Russ Scalf · Public domain · Source · ⁨来源⁩
Portable Geiger counter Berthold LB122-02

Lilly_M · CC BY-SA 3.0 · Source · ⁨来源⁩

06 · 空间物理

The Sun

NASA/SDO (AIA) · Public domain · Source · ⁨来源⁩
Saturn

NASA / JPL / Space Science Institute · Public domain · Source · ⁨来源⁩
Jupiter

NASA Hubble · CC BY 2.0 · Source · ⁨来源⁩
Mars

ESA & MPS for OSIRIS Team MPS/UPD/LAM/IAA/RSSD/INTA/UPM/DASP/IDA, CC BY-SA 3.0 IGO · CC BY-SA 3.0 igo · Source · ⁨来源⁩
Whirlpool Galaxy

NASA and European Space Agency · Public domain · Source · ⁨来源⁩
FullMoon2010

Gregory H. Revera · CC BY-SA 3.0 · Source · ⁨来源⁩
Laser Towards Milky Ways Centre

ESO/Yuri Beletsky (ybialets at eso.org) · CC BY 4.0 · Source · ⁨来源⁩
Oldest Light in the Universe (SVS30133)

NASA's Scientific Visualization Studio - Marit Jentoft-Nilsen, Global Science and Technology, Inc./Mark Malanoski · Public domain · Source · ⁨来源⁩
HL Tau protoplanetary disk

ALMA (ESO/NAOJ/NRAO) · CC BY 4.0 · Source · ⁨来源⁩
ISS Aug2005

NASA · Public domain · Source · ⁨来源⁩

English Grammar · A1 · ⁨英语语法 · A1⁩

08 · Topic 08

Full English breakfast at the Chalet Cafe, Cowfold, West Sussex, England

Acabashi · CC BY-SA 4.0 · Source · ⁨来源⁩

English Grammar · A2 · ⁨英语语法 · A2⁩

02 · Topic 02

Senior person reading a book indoors closeup

Nenad Stojkovic · CC BY 4.0 · Source · ⁨来源⁩

09 · Topic 09

DFC 2099 A bustling market stall piled high with bright green grapes and other fresh fruit as a vendor hands a bag to a customer - a colorful scene of everyday produce trade

PattayaPatrol · CC BY-SA 4.0 · Source · ⁨来源⁩

Python Reference · ⁨Python 参考⁩

16 · Computing concepts

Internet map 1024

The Opte Project · CC BY 2.5 · Source · ⁨来源⁩

Data sources · ⁨数据来源⁩

HSK vocabulary — English / Chinese trainer · ⁨HSK 词汇——英/汉训练器⁩

Word lists & pinyin: · ⁨词表与拼音：⁩ complete-hsk-vocabulary (MIT). Definitions from · ⁨释义来源⁩ CC-CEDICT, CC BY-SA 4.0.
Chinese Reading — news reader · ⁨中文阅读——新闻阅读器⁩

Per-word pinyin & English glosses from · ⁨逐词拼音及英文释义来自⁩ CC-CEDICT (CC BY-SA 4.0), segmented with · ⁨分词处理⁩ jieba. Headlines & articles are fetched live from their news sources and shown for language learning; all rights remain with the original publishers. · ⁨标题与文章实时抓取自新闻源，仅供语言学习使用；版权归原出版方所有。⁩

Simulations · ⁨模拟实验⁩

The interactive simulations linked from the Learn and Know pages are by PhET Interactive Simulations, University of Colorado Boulder, used under CC BY 4.0. · ⁨Learn 和 Know 页面链接的交互式模拟由 PhET Interactive Simulations（科罗拉多大学博尔德分校）提供，采用 CC BY 4.0 授权。⁩