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Urinalysis, urine cup with reagent strip pH paper test and comparison chart in laboratory.
Man, university student and campus with laptop or writing on notebook for assignment outdoor. Male person, college learner and textbook for education with research or study for exam and assessment
Veterinarian Cleaning And VIsiting An Horse In A Farm
Asian girl student doing exam hand holding pencil writing answer in university classroom education high school or university student taking notes while preparing for exam.
A woman's hand with a pen near a piece of paper with a negative sign. Refusal to conclude an agreement. Disagreement. Failure. The student failed the exam. Termination of the contract. Crisis.

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