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研究某种药物对某病的治疗效果时,试验对象应该是()。

单选题
2021-12-30 01:33
A、严重型患者
B、男、女人数必须相等
C、患者群中有代表性的样本
D、对照组为非患某病的人组成
E、非典型症状的患者
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正确答案
C

试题解析

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