问题 实验题

甲、乙、丙三位同学分别将铁块匀速竖直向上提升,所得实验数据如下表:

(1)根据上表可知,做功最多的是    同学,做功最快的是    同学.

(2)为了比较做功的快慢,他们在表中增加了最后一栏(空栏)项目,这个项目含义是                  ,为此物理学中引入一个物理量叫做                                  .

(3)这种引入物理量的方法叫比值法,试举我们已学过的一个类似的物理量为____      

答案

(1)乙;甲

(2)表示做功的快慢;功率

(3)速度(或“密度”“压强”都可以)

阅读理解

阅读理解

       You may know the song Happy Birthday very well. But do you know about its writer? It was written by an American girl. And she became very rich after that.

       When she was a child, she was poor. Once, she was invited to her friend's birthday party. She was

pleased but sad because she didn't have enough money to buy a gift for her.

       "The party is coming soon, but now I have little money." Tears ran down her face.

       Later that night she was in bed, thinking about the gift when the door opened and her grandma came

in." What happened? " her grandma asked. Hearing the girl's story, she said, "Don't worry. I think I can

help you. How about singing a song together? Happy birthday to …"What a beautiful song! They sang

and sang. Suddenly she woke up. It was a dream! She decided to write it down at once and sing it to her

friends at the party.

       When she sang the song at the party the next day, her friends were very happy. "How wonderfully you sing! We haven't heard such a beautiful song before. Thank you for giving me the special gift." said her

friend. And they learnt to sing it together. Later the girl became well-known in America.

1. The song Happy Birthday was written by                     .

A. an American girl

B. an American girl's grandma

C. an American boy

D. an American girl's friend

2. The girl was sad because                   .

A. she didn't want to go to the party.        

B. she would be busy that day.

C. she didn't have enough money to buy a gift.

D. she wasn't invited to the party.

3. What gift did she give her friend?                    

A. A flower.  

B. A toy.    

C. An interesting book.  

D. A song.

4. What did her friends think of the song?  It was                  .

A. boring        

B. beautiful  

C. exciting            

D. interesting

5. Which of the following is TRUE?

A. The girl was still poor after writing the song .

B. The girl sang the song with her grandpa in her dream.

C. The girl's friends had heard the song before.  

D. The girl became famous because of the song.

问答题 简答题