题目内容

It was recommended that passengers _____ smoke during the flight.

A. not
B. need not
C. could not
D. would not

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A. 规定总体
B. 取样的随机性
C. 取样的代表性
D. 合理的样本容量

She asked that she _____ allowed to see her son in police custody.

A. would be
B. could be
C. be
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A. 操作性
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A. 1/3
B. 3/4
C. 2/3
D. 1/2