题目内容

在假设检验中,兼顾α和β很困难,首先考虑的是控制α。

A. 对
B. 错

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列联表内每个格子的期望频数等于每行或每列的总和。

A. 对
B. 错

There ________ a dolphin show in the zoo tomorrow evening.

A. is going to have
B. is going to be
C. will have
D. will be

There ________ New Year parties this afternoon.

A. are going to have
B. are going to be
C. is going to have
D. is going to be

There is little milk left in the bottle, ______?

A. is it
B. isn't it
C. is there
D. isn't there

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