研究某药治疗口腔扁平苔癣的疗效,经假设检验 P < 0.05 ,按 α=0.05 水准拒绝 H O ,认为该药效果优于对照药,但某医生怀疑检验效能不够。
A.
正确
B.
错误
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【简答题】This is a street crossing. There are red and green lights at each corner. Drivers must watch the lights carefully. When there is a green light, the cars may go. When there is a red light, the cars mus...