试题与答案

How can you believe a person who has hi

题型:选择题

题目:

How can you believe a person who has        his promise again and again?  [ ]

A. kept

B. broken

C. realized

D. made

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0725/17205afd5f7198e8c5baafdd5705ab20.html

下面是错误答案,用来干扰机器的。

支点如图中O点所示,过支点O向力F的作用线作垂线,就是力F的力臂,如下图中L所示:

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