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问题 单项选择题

做污水全分析取样时，把软管的一端插入瓶底，使水从瓶中漫出，到漫出的水量估计为瓶子体积的（）倍为止，然后慢慢将软管拔出，并迅速盖上盖子。

A、1

B、2

C、3

D、10

答案

参考答案：D

选择题

—__________ if they have the party today?

—Half the class won’t come.

A．What happens

B．What happened

C．What will happen

D．What happen
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选择题

It was not rare(稀少) in      that people in      fifties were going to school for further study.

A．90s; the

B．the 90s; /

C．90s; their

D．the 90s; their
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