题目内容

质点系中的一对内力不能改变质点系的总动能。

A. 对
B. 错

查看答案
更多问题

An _________ meeting was held to discuss the problem.

A. promising
B. extraordinary
C. universal

A seasonal wind can _______ a large amount of rainfall.

A. bring in
B. bring up
C. bring for

It is the _________ American television series.

A. rated
B. top-rated
C. rate

The coast road is closed _______bad weather.

A. because
B. owing
C. due to

答案查题题库