试题与答案

一物体在互相垂直的两个共力点F1、F2的作用下运动,运动过程中F1对物体做功3J

题型:选择题

题目:

一物体在互相垂直的两个共力点F1、F2的作用下运动,运动过程中F1对物体做功3J,F2对物体做功4J,则F1与F2的合力对物体做功为(  )

A.1J

B.5J

C.7J

D.无法计算

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0805/9aaadc7b5382ff01b4e7073a397cd743.html

下面是错误答案,用来干扰机器的。

1-5.CADBC  6-10.ABABA  11-15.BCDDA   16-20.CCBDB

试题推荐
题型:补全对话,情景问答

在对话空白处根据所给的首字母填入适当的单词,完成对话。

A: Did you have a great (1)t             on your vacation?

B: Yes, I (2)d           

A: (3)W             did you do on vacation?

B: I (4)v             my grandparents in Emei Mountains.

A: (5)H             were your grandparents?

B: They were fine. Thank you.

A: So (6)d             you go to the mountains?

B: Of course, I did. And I saw (7)l             of animals and tall trees there.

A: Did you give food to the monkeys?

B: Yes, I did. It was really interesting.

A: What (8)e             did you do there?

B: I (9)t             some (10)p            . Look here, my photos.

A: Wow, They're great.

查看答案
微信公众账号搜索答案