问题 选择题

下列说法中正确的是(  )

A.若两物体运动快慢相同,则两物体在相同时间内通过的路程相同

B.质点做直线运动时,路程等于位移的大小

C.平均速度的大小就是平均速率

D.位移是矢量,位移的方向就是质点运动的方向

答案

A、若两物体运动快慢相同,则两物体在相同时间内通过的路程相同,故A正确

B、在单向直线运动的过程中,位移的大小与路程相等.故B错误

C、平均速率等于路程与时间的比值,平均速度等于位移与时间的比值,平均速度的大小与平均速率不一定相等.故C错误

D、位移的方向由初始位置指向末位置,与运动的方向不一定相同.故D错误.

故选A.

阅读理解

Camilla Chomp was a strange little girl. She liked to spend her time alone eating chocolate. Her parents were worried, so they took all the chocolate away.

Camilla left her house to look for some chocolate. She found a small house full of bottles. Among the bottles, a blue bottle caught Camilla’s eyes. It was full of chocolate. In the bottle there was also a card with the words “Change tears(眼泪) into chocolate.”

Camilla was very excited. She ran out of the house with the bottle to look for someone crying. First, she met a little boy crying hard and collected his tears. The tears were quickly changed into chocolate. While Camilla was collecting the tears, she comforted the boy. Finally, the boy stopped crying and they had a good time together.

Later, Camilla met a woman and an old man crying. The woman had broken some bowls. And the old man’s dog had just died. Camilla collected their tears and made them happy again.

Soon, Camilla knew that making people happy was much more important than finding chocolate. So she stopped collecting tears and began to help sad people. As a result, she had many friends and had a happy life.

小题1:Camilla liked to __________.

A.eat chocolate

B.read books

C.collect coins

D.eat fruit小题2: Camilla’s parents took away all the chocolate because they were ___________.

A.happy

B.angry

C.worried

D.hungry小题3:What caught Camilla’s eyes?

A.A nice card.

B.A black dog.

C.A red cup.

D.A blue bottle.小题4:The old man was crying because ___________.

A.he had broken some bottles

B.He couldn’t find his way home.

C.he couldn’t find his daughter

D.his dog had just died小题5: How many people did Camilla help before she stopped collecting tears?

A.One.

B.Two.

C.Three.

D.Four.

单项选择题