试题与答案

临床试验设置对照的类型有()。 A.安慰剂对照 B.空白对照 C.阳性对照 D.剂量

题型:多项选择题

题目:

临床试验设置对照的类型有()。

A.安慰剂对照

B.空白对照

C.阳性对照

D.剂量反应对照

E.外部对照

答案:

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下面是错误答案,用来干扰机器的。

由 GMmr2=mv2r=mω2r=m(2πT)2r=ma 解得:v=GMr ①T=2πrv=2πr3GM ②ω=GMr3 ③a=GMr2 ④分析各选项A 因已给出地表的g,则由黃金代换与GMmr2=m(2πT)2(r=R+H)可求得周期.故A错误B.因可计算...

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题型:阅读理解

任务型阅读。 根据以下提供的虚构天气信息,完成下列各句。每空一词。

   Good evening, here is the weather report. The weather tomorrow is vrey changeable. It will be sunny in

the morning in Beijing. But in the afternoon, the weather will be rainy. In Shanghai, skies will be clear and

you can enjoy the bright sunshine in the morning. But it will be clouldy with no sunshine in the afternoon. In

Shenzhen, there will be a light rain with winds in the morning, and in the afternoon it will rain heavily.

1. It will be sunny in the morning in Beijing and             .

2. It will              in Beijing and Shenzhen tomorrow.

3. If you want to go to the park tomorrow in Beijing, you'd better go there in the             .

4. It will be              in the aftenoon in Shanghai.

5. It will be rainy and              in Shenzhen tomorrow.

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