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问题 选择题

下列4个图象，能正确反映对应关系的是（　　）

A．

用酒精灯加热一定量的高锰酸钾固体

B．

    电解水

C．

向一定量过氧化氢溶液中加入少量二氧化锰

D．

向一定量硫酸铜溶液中不断加入铁粉

答案

A、高锰酸钾分解产生了二氧化锰，所以反应前二氧化锰的质量为0，二氧化锰的质量分数也为0，而随着反应的进行二氧化锰的质量不断增大，二氧化锰的质量分数也增大，直到反应结束为一定值，故A错误；

B、通电分解水时产生氢气的体积是氧气的二倍，而不是质量，故B错误；

C、过氧化氢溶液中加入少量二氧化锰生成水和氧气，所以剩余液体中氢元素的质量不变，故C正确；

D、根据铁和硫酸铜反应的化学方程式：Fe+CuSO4═Cu+FeSO4

                                   56         64

可以判断消耗的铁的质量要小于生成的铜的质量，所以可以判断金属的质量是增加的，故D错误．

故选：C．

完形填空
完形填空。

     The half-empty coffee cups, still standing next to their plates, tell of a morning like any other. And
yet, that grey covering of dust that everything   1   tells a different story: it tells of screams, tears, terror
and   2  . Now the restaurant in the World Trade Center will   3   again serve breakfast. And never
again will all those people go there to eat or   4  . So many people whose faces we associate with life
and liveliness are gone
   5 . So many words remain    6  , and so much happiness has been destroyed. In their places are
tear-stained(泪水沾湿的) faces.
     My generation has seen this. On Monday, a fight with my sister, a bad grade and homework 7  to
be the biggest problems in the world. Tonight, so many across the country know that America's pain
is at its    8   ever.
     We have   9   World WarⅡ. But to most of us students, that's an event on a textbook  10   that
would never happen today.  
     After all, this was a time of   11   and wealth-the United States was powerful and successful. There
would be no more wars, and we were   12   to live in such a time.
     But when those planes   13   ; when firefighters with   14   on their faces ran among the parts of the
building that had fallen; when people   15   for their family members; when history was unfolding before
our eyes, in full, clear color-then we knew the world had been changed.   16   how many human beings
turned to ashes in a second, and seeing some jump from the buildings, I know that my generation is
growing up in a world where    17   can still be evil.
     But seeing those heroes risk their lives among the castle-like ruins, and seeing the   18     blood
donors at the hospitals, my generation has learned that tears are allowed, that mankind can also be 
  19   , and that the ghost of evil never   20   the spirit of good.

( ) 1. A. dresses  
( ) 2. A. blood      
( ) 3. A. still      
( ) 4. A. work    
( ) 5. A. yesterday  
( ) 6. A. unknown    
( ) 7. A. turned    
( ) 8. A. least      
( ) 9. A. experienced
( )10. A. text       
( )11. A. tears    
( )12. A. unlucky    
( )13. A. fell      
( )14. A. terror  
( )15. A. called    
( )16. A. Knowing    
( )17. A. everyone    
( )18. A. unwilling  
( )19. A. beautiful
( )20. A. hurt     		B. gets    
B. surprise
B. never    
B. drive    
B. tonight
B. untold
B. had      
B. worst    
B. known
B. lesson  
B. terror  
B. promising
B. landed  
B. surprise
B. screamed
B. Telling
B. nobody
B. eager
B. terrible
B. beat     		C. wears  
C. laugh      
C. hardly    
C. play      
C. last night  
C. unchanged    
C. got        
C. best      
C. read about  
C. copy      
C. peace      
C. convenient  
C. hit        
C. joy        
C. died        
C. Hearing    
C. mankind      
C. happy      
C. terrified    
C. wins      		D. covers              
D. cry                  
D. seldom              
D. swim                
D. this morning        
D. unsaid              
D. seemed              
D. most                
D. seen                
D. page                
D. health              
D. lucky                
D. exploded            
D. smile                
D. reached              
D. Remembering          
D. our country          
D. curious              
D. hopeful              
D. defeats              
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单项选择题

劳动者离开用人单位时，有权索取（），用人单位应当如实、无偿提供，并签章

A.本人职业健康监护档案

B.本人职业健康监护证明复印件

C.本人职业健康监护证明

D.本人职业健康监护档案复印件
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