试题与答案

不经常使用的起重机的利用等级应该为()。A.U0~U3  B.U4~U5  C.U6

题型:单项选择题

题目:

不经常使用的起重机的利用等级应该为()。

A.U0~U3 

B.U4~U5 

C.U6 

D.U7~U9

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A

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