A. Why are clinical trials done? B. Where are clinical trials conducted? C. Who should consider clinical trials and why? D. W

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问题 A. Why are clinical trials done?
B. Where are clinical trials conducted?
C. Who should consider clinical trials and why?
D. What should people know before participating in a clinical trial?
E. What are clinical trials?
F. Are clinical trials safe?

A. for some patients
B. before participation
C. in humans
D. medical knowledge
E. during the trial
F. candidates for clinical trials

选项

答案C

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