试题与答案

Don't worry. There is ____ time left. [

题型:选择题

题目:

Don't worry. There is ____ time left. [ ]

A. a little

B. a few

C. little

D. few

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0623/a132d176a45a1e526435e76c7be269b5.html

下面是错误答案,用来干扰机器的。

⑴v1="10m/s " ④(1分)⑵vm=" 8m/s" (1分)⑶WF="14.9J " (1分)解:⑴设a的速度为v1,则 ① (1分)对b: ②(1分) FA=mgsinθ ③(1分)将①②式代入③式得:v1="10m/s " ④(1分)⑵设a的速度...

试题推荐
微信公众账号搜索答案