题目内容

Does she have any experience of ____________(teach).

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Jenny's not _______________________(have been trained) as a dancer is her one regret.

A severe fever prevented her _______________(attend) the meeting.

假设的所有检验中，犯第一类和第二类错误的概率α和β满足α+β=1。

A. 对
B. 错

当H0为真时拒绝H0，犯了“第一类”错误。

A. 对
B. 错