题目内容

反循环钻孔时,为维持护筒内的水头,避免孔壁坍塌,必须注意()。

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What is most probably their relationship?

招投标阶段,疏浚工程中需另行计量的工程量有()。

Which of the following countries is Jane most likely to go?

How much will he be paid a week?

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