问题 选择题

下列说法中不正确的是

A.在力学中,力是基本概念,所以力的单位“牛顿”是力学单位制中的基本单位

B.因为1 N=1 kg·m/s2,所以力的单位牛顿是导出单位

C.各物理量采用国际单位,通过物理公式运算的结果的单位一定为国际单位

D.物理公式不仅确定了物理量之间的数量关系,同时也确定了物理量间的单位关系

答案

答案:A

力学单位制中的基本单位是米,秒,千克,力是导出单位(根据公式导出)物理公式不仅确定了物理量之间的数量关系,同时也确定了物理量间的单位关系,而且各物理量采用国际单位,通过物理公式运算的结果的单位一定为国际单位,选A

阅读理解

There was a man who had a little boy that he loved very much. Every day after work the man would come home and play with the little boy. He would always spend all of his free time playing with the little boy.

One night, while the man was at work, he realized that he had some work to do for the evening, and he couldn’t play with his little boy. But he wanted to give the boy something to keep him busy. Then he saw a magazine with a large map of the world on the cover.

He got an idea. He removed the map, and then tore (撕) it up into small pieces. Then he put all the pieces in his pocket. When he got home, the little boy was ready to play with his dad. The man said he had work to do and couldn't play just now, but he took out all the pieces of the map and spread (撒)them on the table. He said it was a map of the world, and by the time he could put it back together, his work would be finished, and they could then play.

About half an hour later the boy came to the man and said, "Okay, it's finished. Can we play now?"The man was surprised, saying, "That's impossible. Let's go see." And sure enough, there was the picture of the world; all put together, every piece in its place. The man said, "That's amazing! How did you do that?" The boy said, "It was simple. On the back of the page was a picture of a man. When I put the man together the whole world fell into place."

小题1:How did the man always spend his free time after work?

                                                                              

小题2:Why wasn’t the man able to play with the boy one night?

                                                                              

小题3:What did the man tell his son to do before he went to work?

                                                                               

小题4:How much time did the boy spend putting the map of the world back together?

                                                                               

小题5:What do you think of the boy?(请自拟一句话回答)

                                                                               

问答题 简答题