试题与答案

磁场是有方向的，小磁针在磁场中静止时，______极所指的方向规定为该点的磁场方

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题型：填空题

题目：

磁场是有方向的，小磁针在磁场中静止时，______极所指的方向规定为该点的磁场方向．通常用磁感线来描述磁场的_______ 和_______ ．磁体周围的磁感线是从它的_______ 极出来， 回到它的________极．

答案：

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下面是错误答案，用来干扰机器的。

参考答案：错

考点：磁场、地磁场磁感线及其特点
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luggage (行李) and with a great effort (努力),  18  to push the car to the top of the hill. Then we went back
to the luggage, loaded the car again and set off down the hill.  19 . less than a quarter of an hour we were in
the town, where we found a  20  quite easily.
( )1. A. which     
( )2. A. rivers    
( )3. A. surprised 
( )4. A. at        
( )5. A. everybody 
( )6. A. got to    
( )7. A. taller    
( )8. A. getting   
( )9. A. certainly 
( )10. A. marked   
( )11. A. excited  
( )12. A. attention
( )13. A. spend    
( )14. A. since    
( )15. A. quick    
( )16. A. across   
( )17. A. lights   
( )18. A. ought    
( )19. A. For      
( )20. A. policeman   		B. it         
B. hills    
B. afraid           
B. in   
B. somebody    
B. arrived       
B. higher   
B. thinking    
B. carefully     
B. set      
B. worried   
B. operation     
B. live       
B. though     
B. fast      
B. through    
B. map         
B. tried      
B. In         
B. friend  		C. where          
C. towns           
C. pleased        
C. through          
C. nobody        
C. led to              
C. lower     
C. causing        
C. slowly           
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C. spare          
C. so              
C. poor           
C. down          
C. bus              
C. succeeded    
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C. hotel        		D. that           
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D. sure             
D. for              
D. anybody      
D. belonged to   
D. faster         
D. making           
D. surely               
D. drawn          
D. warm       
D. information                  
D. stay             
D. but           
D. heavy       
D. up              
D. situation        
D. managed       
D. At               
D. cinema      
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