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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问题:

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.

考点:电荷、元电荷
题型:填空题

一个正方体的棱长是6分米,它的体积与表面积相等.______.

题型:填空题

不是根性感觉障碍表现特点的是()

A.可出现分离性感觉障碍

B.可出现根性痛

C.感觉障碍呈节段型分布

D.症状出现于病变同侧

E.可见于髓外占位性病变

题型:填空题
完形填空。
     When my son was 11 years old, he got a small job helping out with a traveling carnival in our town. He
didn't come home at lunch time, phoning   1   to tell me he was fine and had found a few days' work   2   
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
young men who were twin brothers, and their mom and dad. They had   6   him a few dollars and invited him
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
carnival. "Oh, Mom, these are just  10  everyday people like anyone else. They  11  work at a carnival instead
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    
C. task     
D. besides    
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    
D. singers    
D. unlucky    
D. match      
题型:填空题

连朴饮的功用是

A.解表化湿,理气和中

B.清热化湿,理气和中

C.宣畅气机,清利湿热

D.行气降浊,宣化寒痰

E.温中行气,燥湿除满

题型:填空题

病理情况下呼吸节律出现哪些变化及其表现?

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