问题 单项选择题

磁路定律可由()来证明其正确。

A.描述磁场性质的磁通连续性原理;

B.安培环路定律;

C.描述磁砀性质的磁通连续性原理和安培环路定律;

D.磁路欧姆定律。

答案

参考答案:C

完形填空
完形填空。
     What do you know about the sea (大海)? Some people often see it, __1__ the others don't. The sea
looks __2__ on a fine sunny day. Millions of people hope to take their __3__ by the sea. They can swim
in it, or lie on the beaches in the sun. They __4__ themselves there. But it can be very rough (猛烈) when
there is a strong wind. What other things do we know about it?
     Of course, the sea is very large. Looking at a __5__ of the world, you can see it is much bigger than
land. There are a lot of __6__ in the sea. Some of them are big and the others are __7__.
     Did you swim in the sea? If you answer "Yes", you may know that the water is salty (咸的). Rivers
carry __8__ from the land to the sea. Some places of the sea are more salty than other places. Do you
know the Dead Sea (死海)? Fish __9__ live in it. And people can easily swim in it. Nobody is afraid to
__10__ in the water.
(    )1. A. and      
(    )2. A. useful  
(    )3. A. classes  
(    )4. A. enjoy    
(    )5. A. book    
(    )6. A. roads    
(    )7. A. small    
(    )8. A. sugar    
(    )9. A. can      
(    )10. A. lift    
B. so        
B. beautiful
B. sports    
B. like      
B. map      
B. shops    
B. young    
B. butter    
B. must      
B. sink      
C. but      
C. terrible  
C. meetings  
C. stop      
C. newspaper
C. houses    
C. little    
C. salt      
C. can't    
C. walk      
D. or        
D. weak      
D. holidays  
D. begin    
D. picture  
D. islands  
D. good      
D. oil       
D. mustn't   
D. sleep    
单项选择题