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:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0422/759ad7f54d711004bec4e601208360ad.html
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