问题 填空题

声音的传播需要介质.在外太空中宇航员需要借助无线电来交谈.这说明______不能传播声音.

答案

因为月球上是没有空气的,需要靠无线电来对话交谈,说明真空中不能传播.

故答案为:真空.

完形填空
完型填空。
    Mary was born in a worker's family. But she always    1   her friends that her father is very rich. They
know her very well, but   2   says anything about it.
    Last month Miss Brown,   3   friends, asked Mary to her birthday party. The girl went there with some
   4  . She got on a bus but there were a lot of people in it. She couldn't find any seat. A young man saw this,
he   5   and said, "Take my seat, please."
    Mary   6   him and sat down. To her surprise, she saw him again at the party. She was very   7   and went
to say hello to him. They began to dance. The young man heard a piece of   8   and liked it very much. He told
the girl he taught piano at school.
    "I bought a piano ten years    9  ," said Mary.
    "You must play it well, I think."
    "  10 , I can't. I don't know how to get the lid (盖子) open," answered the girl.

( )1. A. tells        
( )2. A. everyone     
( )3. A. her one      
( )4. A. piano        
( )5. A. put on       
( )6. A. thanked      
( )7. A. tired        
( )8. A. seat         
( )9. A. after        
( )10. A. Excuse me    

B. says          
B. anyone         
B. one of her     
B. seat           
B. looked at         
B. listened       
B. sad           
B. bread          
B. ago           
B. Of course    
C. speaks     
C. nobody        
C. one her   
C. man          
C. stood up        
C. laughed    
C. careful     
C. piano       
C. behind      
C. Sorry    
D. talks         
D. someone           
D. some of her   
D. presents          
D. got up        
D. wanted                                  
D. happy         
D. music          
D. soon            
D. Thank you   
选择题