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    Focused high school boy student taking exam at desk in classroom — Stock Photo
    Focused high school boy student taking exam at desk in classroom
    Flush toilet microbes on contaminated surface, conceptual digital illustration on grey background. — Stock Photo
    Flush toilet microbes on contaminated surface, conceptual digital illustration on grey background.
    Young female field hockey players practicing sports drill on field at night — Stock Photo
    Young female field hockey players practicing sports drill on field at night
    Blood clot structure — Stock Photo
    Blood clot structure
    Conceptual illustration showing bacteria Vibrio cholerae in drop of water from tap. — Stock Photo
    Conceptual illustration showing bacteria Vibrio cholerae in drop of water from tap.
    Grandson holding his grandmother's hand — Stock Photo
    Grandson holding his grandmother's hand
    Hourglass in hands of scientist, conceptual image of passing time. — Stock Photo
    Hourglass in hands of scientist, conceptual image of passing time.
    Red and green apple being held in a female hand — Stock Photo
    Red and green apple being held in a female hand
    Cropped image of businessman riding bicycle with feet up in rain — Stock Photo
    Cropped image of businessman riding bicycle with feet up in rain
    Sugar in a wooden bowl and spilled on a wooden background with the word 'sugar' — Stock Photo
    Sugar in a wooden bowl and spilled on a wooden background with the word 'sugar'
    Woman checking plants and seedlings. — Stock Photo
    Woman checking plants and seedlings.
    Friends talking, text on background — Stock Photo
    Friends talking, text on background
    Mule Deer In A Meadow — Stock Photo
    Mule Deer In A Meadow
    Relationship between Earth and Gliese-1214b — Stock Photo
    Relationship between Earth and Gliese-1214b
    Person drawing city on canvas — Stock Photo
    Person drawing city on canvas
    Focused high school boy student taking exam at desk in classroom — Stock Photo
    Focused high school boy student taking exam at desk in classroom
    People walk across and relax on the Polyterrasse below the Federal Institute of Technology in Zrich, Switzerland. — Stock Photo
    People walk across and relax on the Polyterrasse below the Federal Institute of Technology in Zrich, Switzerland.
    Objects placed on wooden surface — Stock Photo
    Objects placed on wooden surface
    Concept: Victory and happiness. Man on a paddle surf board. In the middle of the blue sea. Arms raised holding the oar. Watching the sunrise. Lens flare and reflections. — Stock Photo
    Concept: Victory and happiness. Man on a paddle surf board. In the middle of the blue sea. Arms raised holding the oar. Watching the sunrise. Lens flare and reflections.
    Focused high school girl student taking exam at desk in classroom — Stock Photo
    Focused high school girl student taking exam at desk in classroom
    Junior high students using computers in computer lab — Stock Photo
    Junior high students using computers in computer lab
    Laptop and camera on tabletop — Stock Photo
    Laptop and camera on tabletop
    Back of a woman in ntural blue backdrop. Symmetry, natural beauty concept: mid section of undressed young woman in front of clean water reflecting sky — Stock Photo
    Back of a woman in ntural blue backdrop. Symmetry, natural beauty concept: mid section of undressed young woman in front of clean water reflecting sky
    Female high school teacher helping girl student doing homework in classroom — Stock Photo
    Female high school teacher helping girl student doing homework in classroom
    Crop anonymous female holding cute little gray guinea pig against white background — Stock Photo
    Crop anonymous female holding cute little gray guinea pig against white background
    Toilet seat microbes, conceptual digital illustration. — Stock Photo
    Toilet seat microbes, conceptual digital illustration.
    Focused junior high boy student listening to friends in corridor — Stock Photo
    Focused junior high boy student listening to friends in corridor
    Scenic rocky landscape at sunset — Stock Photo
    Scenic rocky landscape at sunset
    Close up image of child hands with a pile of colorful pencils — Stock Photo
    Close up image of child hands with a pile of colorful pencils
    Woman with pencil painting town on big paper — Stock Photo
    Woman with pencil painting town on big paper
    Electrician changing light fixture with tool — Stock Photo
    Electrician changing light fixture with tool
    Laptop and camera on tabletop — Stock Photo
    Laptop and camera on tabletop
    Focused young female field hockey player reaching with hockey stick, practicing on field at night — Stock Photo
    Focused young female field hockey player reaching with hockey stick, practicing on field at night
    Hot dog with drawing — Stock Photo
    Hot dog with drawing
    Toilet microbes on contaminated seat surface in water closet, conceptual digital illustration. — Stock Photo
    Toilet microbes on contaminated seat surface in water closet, conceptual digital illustration.
    Barefoot legs of people — Stock Photo
    Barefoot legs of people
    Cropped image of ballerina with red ballet tips warming up to dance on the street, performing poses, closed up to the ballerina tips — Stock Photo
    Cropped image of ballerina with red ballet tips warming up to dance on the street, performing poses, closed up to the ballerina tips
    Male community college instructor helping student at computer in computer lab — Stock Photo
    Male community college instructor helping student at computer in computer lab
    Focused junior high boy student using computer in dark computer lab — Stock Photo
    Focused junior high boy student using computer in dark computer lab
    Safety of drinking water. Conceptual illustration showing hepatitis A virus in drop of water. — Stock Photo
    Safety of drinking water. Conceptual illustration showing hepatitis A virus in drop of water.
    Pestle and mortar on violet background, studio shot. — Stock Photo
    Pestle and mortar on violet background, studio shot.
    Couple talking, text on background — Stock Photo
    Couple talking, text on background
    Photos of details, of an old lady, in a typical grandmother's kitchen, in spain, while she is cooking. In the foreground the hand with the wedding ring, in the background the hand holding the — Stock Photo
    Photos of details, of an old lady, in a typical grandmother's kitchen, in spain, while she is cooking. In the foreground the hand with the wedding ring, in the background the hand holding the
    Laptop surface with postcard and pen — Stock Photo
    Laptop surface with postcard and pen
    Scientist holding petri dishes with artificial meat, conceptual image of cultured meat grown in laboratory. — Stock Photo
    Scientist holding petri dishes with artificial meat, conceptual image of cultured meat grown in laboratory.
    Focused high school girl student taking exam at desk — Stock Photo
    Focused high school girl student taking exam at desk
    Mature male community college student with headphones at computer in classroom — Stock Photo
    Mature male community college student with headphones at computer in classroom
    Close-up of male hands holding soil in garden — Stock Photo
    Close-up of male hands holding soil in garden
    Grains and pulses in plastic cups for agriculture research, conceptual image. — Stock Photo
    Grains and pulses in plastic cups for agriculture research, conceptual image.
    Bottle of water in Black Rock Desert in Nevada — Stock Photo
    Bottle of water in Black Rock Desert in Nevada
    Landscape with woman at seaside beach rocks and turquoise clear — Stock Photo
    Landscape with woman at seaside beach rocks and turquoise clear
    Spotlight on businesswoman on stage — Stock Photo
    Spotlight on businesswoman on stage
    Focused high school boy taking exam at desk in classroom — Stock Photo
    Focused high school boy taking exam at desk in classroom
    Golden Bitcoins scattered on golden surface — Stock Photo
    Golden Bitcoins scattered on golden surface
    Female engineer planning, creating flow chart in office — Stock Photo
    Female engineer planning, creating flow chart in office
    Microgreens in the eggshells, spring and easter concept — Stock Photo
    Microgreens in the eggshells, spring and easter concept
    High school girl student taking exam at desk in classroom — Stock Photo
    High school girl student taking exam at desk in classroom
    Focused junior high boy student using computer in computer lab — Stock Photo
    Focused junior high boy student using computer in computer lab
    Camera, instant photos and hat on desk — Stock Photo
    Camera, instant photos and hat on desk
    High school students taking exam at tables — Stock Photo
    High school students taking exam at tables