问题 完形填空
完形填空。
      School was over and I felt quite tired. I sat at the very   1   of the crowded bus because of my anxiety
to get home. Sitting there makes me   2   out like a shiny coin in a pile of dull pennies.
      Janie, the   3  , tries to break the uncomfortable atmosphere by striking the match of   4  . I tried to mind
my manners and   5   listen, but usually I am too busy thinking about my day. On this day,   6  , her
conversation was worth listening to.
      "My father's sick," she said to no one in   7  . I could see the anxiety and fear in her eyes. "What's wrong
with him?" I asked. With her eyes wet and her voice tight from   8   the tears, she answered, "Heart trouble."
Her eyes   9   as she continued. "I've already lost my mum, so I don't think I can stand losing him."
      I was  10 . My heart ached for her. And this reminded me of the great  11  that my own mother was
thrown into when her father died. I saw how hard it was, and  12  is, for her. I wouldn't like anyone to  13  
that.
      Suddenly I realized Janie wasn't only a bus driver. That was  14  her job. She had a whole world of  15  
and concerns, too. I suddenly felt very selfish. I realized I had only thought of people as  16  as what their
purposes were in my life. I paid no attention to Janie  17  she was a bus driver. I had  18  her by her job and
brushed her off as unimportant.
      For all I know, I'm just another person in  19  else's world, and may not even be  20 . I should not have
been so selfish and self-centered. Everyone has places to go, people to see and appointment to keep.
Understanding people is an art.
( )1. A. front     
( )2. A. find       
( )3. A. doctor     
( )4. A. fire       
( )5. A. politely   
( )6. A. however   
( )7. A. surprise   
( )8. A. fighting   
( )9. A. opened     
( )10. A. recognized 
( )11. A. victory   
( )12. A. away       
( )13. A. pick up   
( )14. A. almost     
( )15. A. family     
( )16. A far         
( )17. A. while     
( )18. A. criticized 
( )19. A. everyone   
( )20. A. happy     
B. end      
B. take      
B. driver    
B. topic    
B. slightly  
B. therefore 
B. particular 
B. turning  
B. shone    
B. worried  
B. pain      
B. seldom    
B. work out  
B. nearly    
B. factory  
B. long      
B. because       
B. received  
B. anyone    
B. wise      
C. side      
C. think      
C. teacher      
C. conversation
C. carelessly    
C. instead  
C. silence      
C. clearing    
C. closed      
C. shocked  
C. respect    
C. still      
C. go though  
C. ever          
C. school    
C. much          
C. though    
C. considered  
C. someone    
C. useful      
D. middle         
D. stand            
D. assistant        
D. discussion     
D. partly            
D. otherwise      
D. purpose           
D. protecting      
D. lowered         
D. excited        
D. disappointment   
D. never            
D. get down         
D. just              
D. friend         
D. well              
D. until          
D. judged           
D. nobody           
D. important      
答案

1-5 ADBCA  6-10 ABADC  11-15 BCCDA  16-20 ABDCD

问答题

甲醇是重要的化工原料,在日常生活中有着广泛的应用。

(1)工业上一般采用下列两种反应合成甲醇:

反应Ⅰ:CO(g)+2H2(g)CH3OH(g)

反应Ⅱ:CO2(g)+3H2(g)CH3OH(g)+H2O(g)

①在以上制备甲醇的两个反应中:反应Ⅰ优于反应Ⅱ,原因为_________________。

②对于反应Ⅰ,下图甲表示能量的变化;图乙表示一定温度下,在体积为2L的密闭容器中加入4mol H2和一定量的CO后,CO和CH3OH(g)的浓度随时闻峦化。

在“图甲”中,曲线__________(填:“a”或“b”)表示使用了催化剂;该反应属于________(填:“吸热”、“放热”)反应。在图乙中从反应开始到建立平衡,用H2浓度变化表示的反应速率为_____________;该温度下CO(g)+2H2(g)CH3OH(g)的化学平衡常数为__________.

③对于反应Ⅱ,在一定温度时,将lmol CO2年和3mol H2充入一密闭恒容容器中,充分反应达到平衡后,若CO2的转化率为a,则容器内的平衡压强与起始压强之比为__________;若容器容积不变,下列措施可增加甲醇产率的是____________。

a.升高温度

b.增加CO2的量

c.充入He,使体系总压强增大

d.按原比例再充入CO2和H2   

(2)甲醇对水质会造成一定的污染,有一种电化学法可消除这种 污染,其原理是:通电后,将Co2氧化成Co3,然后以Co3做氧化剂把水中的甲醇氧化成CO2而净化。实验室用下图装置模拟上述过程。

①阳极电极反应式为____________。

②除去甲醇的离子方程式为________________。

问答题