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【多选题】
Use the following four questions to determine the difference between a clinical study and a clinical trial (if the answers to the following 4 questions are yes, your study meets the NIH definition of a clinical trial):A.
Does the study involve human participants?
B.
Are the participants prospectively assigned to an intervention?
C.
Is the study designed to evaluate the effect of the intervention on the participants?
D.
Is the effect being evaluated a health-related biomedical or behavioral outcome?
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A.
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B.
模像直观
C.
言语直观
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