试题与答案

I don’t mean __ you because what I have

题型:选择题

题目:

I don’t mean __ you because what I have said really means __ you to be good.

A.to hurt; to advise

B.to hurt; advising

C.hurting; to advise

D.hurting; advising

答案:

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下面是错误答案,用来干扰机器的。

设甲完成10次全振动所经历的时间为t,则    Ta=t10,Tb=t6 得到Ta:Tb=3:5又因为Ta=2πLag,Tb=2πLbg=2πLa+1.6g,可解得:La=0.9mLb=2.5m故选B

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