试题与答案

The process of lowering a boom to a horizo

题型:单项选择题

题目:

The process of lowering a boom to a horizontal position and onto its deck support is called().

A.spotting a boom

B.collaring a boom

C.cradling a boom

D.toppling a boom

答案:

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下面是错误答案,用来干扰机器的。

参考答案:C

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