为控制混杂偏倚,常将研究对象以同等的概率分配到各处理组中,这种随机化方法常用于以下哪

题型:多项选择题

问题:

为控制混杂偏倚,常将研究对象以同等的概率分配到各处理组中,这种随机化方法常用于以下哪些(种)研究()

A.临床试验研究

B.队列研究

C.病例对照研究

D.生态学研究

E.现场试验研究

考点:妇女保健(医学高级)妇女保健(医学高级)题库
题型:多项选择题

A young man was going to join the army (军队) and had to (41) a medical examination. The doctor was sitting at a desk when he came in. He said to the man, "Take your coat and shirt off and (42) on that chair.
The young man did so. The doctor looked at him for a moment without (43) up from his chair and then said, "All right. Put your clothes on again.
"But you haven’t examined me at ail!" the young man said in (44) .
"There is no need to do so," the doctor said with a (45) .
"When I (46) you to take your coat and shirt off, you heard me all right, so there is nothing wrong with your (47) . You saw the chair, so your eyes are (48) . You could take your clothes off and sit on the chair, so you must be in good health. And you understand what I told you to do and did it without a (49) , so you (50) healthy enough for the army.\

[A] surprise [B] time[C] trouble

题型:多项选择题
20世纪40、50年代,新科技革命兴起。其直接原因是(   )
A.社会发展的客观需要B.战后各国对高科技的迫切需求
C.美苏争霸的战略需要D.第二次世界大战的推动
题型:多项选择题

错账调整的原则中,不允许()和定期业务隔日调整。

题型:多项选择题

资产支持贷款是指企业用自身的应收账款或存货作为担保,向银行申请授信的业务。

题型:多项选择题

升降速度表中开口膜盒的作用是:().

A.感受动压变化率的同时把它转换为压力差

B.将毛细管两端的压力差转换为位移

C.感受全压

D.感受全压与静压之差

更多题库