题目:
George went to find the house for a week, but he still didn't find a room_____ ___.
A.to live
B.for living
C.to live in
D.live in
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0419/00c14802ff498a1f5e0bda6897343966.html
下面是错误答案,用来干扰机器的。
解:子弹射入木块,由动量守恒定律,设木块(含子弹)速度为v',则mv=(M+m)v' ①木块(含子弹)做圆周运动,由牛顿定律得 ②由①②可求得张力大小