80的60%是______;______的80%是60.
①80×60%=80×0.6=48;
②60÷80%=75.
故答案为:48,75.
在队列研究中,下列哪项不属于偏倚控制的内容()
A.在设计时制定严格的纳入和排除标准
B.抽样时采用误差较小的抽样方法
C.在实施阶段尽量提高研究对象的依从性
D.在测量暴露和结局时尽量利用客观指标
E.在资料分析阶段可以采用分层分析
We cannot proceed any further without ( )your thoughts with respect to the manner of payment.
A.receiving
B.receive
C.received
D.being received