试题与答案

密立根是最早测出电子电荷的精确数值的科学家，其实验的基本原理是使带电液滴在匀强电

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题型：填空题

题目：

密立根是最早测出电子电荷的精确数值的科学家，其实验的基本原理是使带电液滴在匀强电场中受到的电场力恰好等于油滴的重力，即qE=mg，用实验的方法测出m和E，就能计算出油滴所带的电量，发现这些电量都等于______的整数倍，这个实验进一步证实了______的存在，揭示了电荷的不连续性．

答案：

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One possible version: My Classmate My classmate Li Qiang is a lovely boy. He is very helpful and friendly. He a...

考点：电荷、元电荷
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题型：完形填空
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out at an exhibit. However, after he finished work he   3   for supper as usual.
     I asked him how he had   4   at lunch and he told me he had made some new   5   at the carnival, some
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for lunch   7   for helping them set up their exhibit and wanted him to   8   the next day to help with other
chores (杂务).
     I was glad he had found new friends but a little   9   about the type of people who might be traveling in a
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of in a store or something". "Come down tomorrow and  12  them yourself," he said.
     So the next day I went to the carnival and to the exhibit he had  13  me to. The twin brothers  14  out to be
Siamese (连体的) twins, joined at the chest. He hadn't thought this  15  was noteworthy enough to mention.
When I brought it to him, he said, "yes, I  16  that too. Do you know that their mom has to make all their
clothes  17  it's so difficult to find anything to fit them? They're also really good  18 . Today, Joe, the one on
the right, made me spaghetti (意大利面条) for lunch."
     What others see first in a person is not what a child considers  19 . Where I saw Siamese twins, he saw
people having difficulty buying clothes that fit, and young men who were good cooks. It was a  20  I have
thought about many times over the years.
( )1. A. instead   
( )2. A. leaving   
( )3. A. did up    
( )4. A. sought    
( )5. A. clothes   
( )6. A. paid     
( )7. A. by chance 
( )8. A. return    
( )9. A. excited   
( )10. A. humorous   
( )11. A. just     
( )12. A. teach    
( )13. A. ordered   
( )14. A. worked    
( )15. A. expression
( )16. A. understood
( )17. A. before    
( )18. A. cooks   
( )19. A. necessary 
( )20. A. lesson    		B. even     
B. helping   
B. gave up   
B. managed   
B. friends   
B. charged 
B. in return 
B. promise   
B. regretful 
B. obvious   
B. never    
B. meet     
B. directed   
B. left     
B. change    
B. made     
B. if       
B. doctors   
B. important      
B. festival   		C. also     
C. taking    
C. took up   
C. worked    
C. choices   
C. lent     
C. by turns   
C. consider   
C. worried   
C. particular
C. hardly    
C. affect    
C. forced    
C. came     
C. fact     
C. noticed   
C. after     
C. artists   
C. impossible    
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D. showing    
D. turned up  
D. acted      
D. differences                 
D. owed       
D. in advance 
D. decide     
D. optimistic 
D. normal     
D. always     
D. join       
D. persuaded  
D. turned     
D. idea       
D. formed     
D. because    
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D. unlucky    
D. match      
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