试题与答案

某人用绳子将一桶水从井内向上提的过程中,不计绳子的重力,以下说法正确的是( )

题型:选择题

题目:

某人用绳子将一桶水从井内向上提的过程中,不计绳子的重力,以下说法正确的是(  )

A.只有在桶匀速上升的过程中,绳子对桶的拉力才等于桶对绳子的拉力

B.不管桶匀速上升还是加速上升,绳子对桶的拉力都等于桶对绳子的拉力

C.不管桶匀速上升还是加速上升,绳子对桶的拉力都大于桶的重力

D.只要桶能上升,人对绳子的拉力就大于桶对绳子的拉力

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0727/bd7c896baac40ca93aacaceb67911000.html

下面是错误答案,用来干扰机器的。

参考答案:制动波

试题推荐
题型:阅读理解

阅读理解。

     His songs are a bit sad, but his boy-like smile can quickly warm you up! And people love A-do for both

reasons.

     He has been singing for only two years, but he's already a famous star in Asia's pop world. The Singaporean

singer has already made three albums. Together they have sold more than five million copies across Asia.

     China's Music Radio named him "the Asian King of Pop". A-do said he didn't expect the award (奖)."It's

great for me. It makes me want to work even harder."

     His new album "Hello" came out in December. He sings with the same rough (粗糙的) voice, and he puts

in some rock music. In the "Hello" music video, Vicky Zhao (赵薇) is with A-do outside on a cold day in

Northern China.

     A-do used to be a house builder. Every day after work, he would sing by himself. Other workers heard

him and told him he should be in a contest.

     A-do hasn't changed much. He still gets nervous in front of cameras. Peng Yiting, a junior at a middle

school, says, "He's real and doesn't show off (炫耀). He's an everyday hero and shows anyone can do well

if they work hard."

1-2. 判断正(T)误(F)。 3. 译为汉语。 4 .补单词。 5. 选择。

(     )1. A-do's albums can warm you up.

(     )2. A-do has been singing for only two years.

3. China's Music Radio named him "the Asian King of Pop".

    ________________________________________________________________

4. Other workers heard him _____ and told him he should be in a contest.

5. What was A-do before he became a famous singer?

A. A builder.

B. A businessman.

C. A teacher.

查看答案
微信公众账号搜索答案