题目内容

使用螺旋泵时，可完全取消通常其他类型污水泵配用的（）、底阀、进水和出水闸阀等配件和设备。

A. 集水池
B. 压水管
C. 吸水管
D. 吸水喇叭口

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集水池的大小要求满足各类型水泵运转的

A. 水力条件
B. 吸入室
C. 气蚀余量
D. 最大流量

Mark the correct answer with a tick that means the same as the oneunderlined in each sentence.1) London’s West End theatres arecurrentlyenjoying a boom in popularity and ticket sales.

A. at present
B. for some time

Audience numbers in 2005 look set tooutstripthat impressive figure.

A. be more important than
B. do better than

The actual process of making films is extraordinarilytedious. It is very difficult to keep your energy and focus.

A. interesting but time-consuming
B. long and boring