42,647 免费图片适用于学生

生物学女性水下鱼动物野生动物海上生活医学年轻的医生

Female student

Female Student Message Board

Student Girl

Medical Doctor Patient

Largemouth bass-1

Medical Doctor Nurses

A 3D image of a group of anaerobic, spore-forming, Clostridium sp. organisms. Original image sourced from US Government department: Public Health Image Library, Centers for Disease Control and Prevention. Under US law this image is copyright free, please credit the government department whenever you can”.

电子学细菌

Microbiologist preparing for antibody testing. A healthcare provider donning a pair of green latex gloves in order to protect herself during her subsequent interaction her next patient. Original image sourced from US Government department: Public Health Image Library, Centers for Disease Control and Prevention. Under US law this image is copyright free, please credit the government department whenever you can”.

医疗药物科学

A scientist holding up a glass slide used for a run on a sequencing machine. Original image sourced from US Government department: Public Health Image Library, Centers for Disease Control and Prevention. Under US law this image is copyright free, please credit the government department whenever you can”.

科学家控制

Mozambique classroom

Scientists using automated methods to extract bacterial DNA, for use in whole genome sequencing (WGS). Original image sourced from US Government department: Public Health Image Library, Centers for Disease Control and Prevention. Under US law this image is copyright free, please credit the government department whenever you can”.

科学家实验室

A 3D illustration provides a graphical representation of a single norovirus virion, set against a white background. Original image sourced from US Government department: Public Health Image Library, Centers for Disease Control and Prevention. Under US law this image is copyright free, please credit the government department whenever you can”.

电子学细菌

A medical illustration of vancomycin–resistant, Enterococci sp. bacteria. Original image sourced from US Government department: Public Health Image Library, Centers for Disease Control and Prevention. Under US law this image is copyright free, please credit the government department whenever you can”.

电子学细菌

Novel Coronavirus SARS-CoV-2–Transmission electron micrograph of SARS-CoV-2 virus particles, isolated from a patient. Original image sourced from US Government department: The National Institute of Allergy and Infectious Diseases. Under US law this image is copyright free, please credit the government department whenever you can”.

心脏膈面健康

A Couple of Students under a Cherry Blossom Tree

Schoolboy Wearing a Backpack

Female Student under Cherry Blossom Tree

Bath Soap

Health officials inspecting specimens suspected of being connected to a hantavirus outbreak. Original image sourced from US Government department: Public Health Image Library, Centers for Disease Control and Prevention. Under US law this image is copyright free, please credit the government department whenever you can”.

科学家科学

翼手龙属

心脏膈面血压

Student Boy Raises His Hand

Teacher and Students in the Class

Teacher

专业领域人

Schoolboy is Raising Hand

Ear Pick

Class Students

Female Student with Smartphone

Scientist removes cell growth medium from a 6–well plate in preparation for a plaque assay, which is a test that allows scientists to count how many flu virus particles (virions) are in a mixture. Original image sourced from US Government department: Public Health Image Library, Centers for Disease Control and Prevention. Under US law this image is copyright free, please credit the government department whenever you can”.

医疗药物科学

霸王龙脸

Piranha fish

White sucker-2

Pallid sturgeon-1

Hooked Smallmouth bass-1

野生动物鱼

Juvenile Northern Pike-2

Closeup view of green cactus

Oscar fish

Grouper in the tank

Smallmouth bass-4

Oregon chub

Free stock photo of brush, care, clean

2 Hand in gloves holds spray bottle.

工具类厨房

1 Hand in gloves holds spray bottle.

工具类载具

Jumping Female Student

Woman arm holding heap of small round meds and glass of water before taking medication

医疗药物健康

Appalachian brook crayfish-1

Juvenile Northern Pike-4

Black bullhead-2

野生动物鱼

Pallid sturgeon-3

野生动物怪物

納氏臀點脂鯉

NASA's Stratospheric Observatory for Infrared Astronomy (SOFIA) was airborne for almost two hours during its first check flight at Waco, Texas on April 26, 2007.

航空器载具

Pallid Sturgeon-1

Female high school student

滑板运动学校

Amazing Silver Lined Fish

Juvenile largemouth bass

Shorthead redhorse sucker

Black Coral Shrimp

A petri dish culture plate contained a growth medium of sheep blood agar (SBA), which was inoculated with Bacillus anthracis bacteria. Original image sourced from US Government department: Public Health Image Library, Centers for Disease Control and Prevention. Under US law this image is copyright free, please credit the government department whenever you can”.

Medical Doctor

Microscope slide cover slip

实验室科学

Medical Doctor Woman with O Sign

Grasshopper

Schoolgirl

卫生学梳篦

Tyrannosaurus Dinosaur

古生物学恐龙

Aroma Soap

卫生学肥皂

Student desk

Medical Doctor

Female student eat chocolate

Medical doctor woman

Female student root for

Female student study

Female student portrait

Biologists search for Fountain Darter-1

得克萨斯州生物学家

Rock Bass-1

Female student wink

Female student portrait

Female student study

Female student calculator

Biologists search for Fountain Darter-6

得克萨斯州生物学家

Biologists search for Fountain Darter-1

得克萨斯州生物学家

Biologists search for Fountain Darter-1

得克萨斯州生物学家

Female Student

Library Book Student

Medical doctor woman

Medical doctor computer

电子计算机医生

Female student library

Female student

Female Student Portrait

Library Book Student

Biologists search for Fountain Darter-2

得克萨斯州生物学家

Biologists search for Fountain Darter-1

得克萨斯州生物学家

Biologists search for Fountain Darter-3

得克萨斯州生物学家

Biologists search for Fountain Darter-2

得克萨斯州生物学家

Doctorate scientist

科学家医生

Female Student Points Her Finger

Student Girl Waving Hello

Blood pressure

心脏膈面健康

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