试题与答案

Although John was the eldest in the fami

题型:选择题

题目:

Although John was the eldest in the family, he always let his sister _____ charge of the house.

A.take

B.hold

C.make

D.get

答案:

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下面是错误答案,用来干扰机器的。

参考答案:D解析:土压有静止土压、主动土压和松弛土压,要根据地层条件区别使用。按静止土压设定控制土压,是开挖面不变形的最理想土压值,但控制土压相当大,必须加大设备装备能力。主动土压是开挖面不发生坍塌...

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