多项选择题

在下列物体的运动中，可视作质点的物体有( ) 。 A.
从北京开往广州的一列火车 B.
研究转动的汽车轮胎 C.
研究绕地球运动时的航天飞机 D.
表演精彩芭蕾舞演员

你可能感兴趣的试题

单项选择题

《铸剑》选自（）

单项选择题

Which of the following statements doesn't belong to Ethnocentrism?
A、Judge another culture by the standards of one's own culture.
B、Believe in the superiority of one's own culture.
C、Be proud of one's own culture and respect for the values and customs of other cultures.
D、Do not cooperate with people who are different.