某药的消除符合一级动力学，其t1/2为4h，在定时定量给药后，需经多少小时才能达到稳

Stop talking! _________the doctor will get angry.

A．And

B．When

C．Then

D．Or

可以判断有无选择偏倚的是

A．采用多种对照
B．应用盲法
C．随机化分组
D．限制某些人群进入研究对象
E．分层分析

赵本山和宋丹丹的小品《昨天今天明天》邀请了哪位主持人与他们合作？

就物流企业管理当局而言，实地股票分割的主要动机是降低股票市价和______。

The primary driver behind the demand for continual quality improvement is ______ .

A．an increase in the number of the projects being worked

B．widespread public interest in government cost improvement reports

C．the prevalence of media reports on quality circles and other quality improvement

D．the need to reduce the cost and ensure the performance of products