问题 选择题

关于惯性,下列说法中正确的是(  )

A.速度大的物体不容易停下来,所以速度大的物体惯性大

B.汽车上坡困难而下坡容易,说明汽车上坡时的惯性比下坡时的大

C.两个质量相同的物体,不论速度是否相同,受力是否相等,其惯性一定相同

D.同一个物体在月球上受到的吸引力小,所以物体在月球上比在地球上惯性小

答案

A、质量是衡量惯性大小的唯一量度,故ABD错误;

C、物体的惯性与物体的速度无关,只和物体的质量有关,故C正确;

故选C.

阅读理解

Are you looking for something fun and would you like to help others in your spare time? Then join us to be a volunteer! We’re a non-profit (非盈利的) organization. We have volunteer jobs of all ages. Anyone, from twelve-year-old children to people in their seventies can become a volunteer.

You can help people in many ways. Schools need help with taking care of children while parents are working. Hospitals need volunteers to look after children while their parents are seeing a doctor. Animal lovers can help take care of those dogs and cats without homes. There is something for everyone.

“As a volunteer, I don’t want to get anything. Seeing the children’s happy faces, I’m happy, too,” said Carlos Domingo, an old woman of 62. “I often played computer games in my spare time before. Now I help older people learn how to use computers,” said another volunteer at the age of 18.

If everyone helps out a bit, we’ll have a better world to live in. Interested? Call us at 010-800-555-5756 or visit our website: www.activol.com.

小题1:            can be a volunteer.

A.Children

B.Old women

C.Anyone aged 12-70

D.Young people小题2:Volunteers want to get              when they help others.

A.money

B.computers

C.everything

D.nothing小题3:Carlos Domingo does volunteer work with            .

A.animals

B.children

C.computers

D.older people小题4:We can probably read such a passage            .

A.in a newspaper

B.in a storybook

C.in a picture book

D.in a textbook

选择题