问题 单项选择题 B1型题

心经虚火所致的眼症是()

A.黑睛星翳

B.两眦血脉稀疏

C.黑睛溃陷

D.黄液上冲

E.瞳仁紧小

答案

参考答案:B

完形填空
完形填空。
     "Can I see my baby?" the happy new mother asked. When the   1   was put into her arms, she felt sad.
The baby had been born without   2  . But the baby's hearing was   3  .
     When the boy ran home from school one day and   4   in her arms, she knew that her son's life would
be   5  . The boy's father asked the doctor   6   something could be done." I believe I could put a pair of
ears on him if they could be   7  ," the doctor said.
     Two years went by. "You are going to the   8   son," said the father one day.   9   would give you the
ears."
     The operation was very  10 , and the boy's life became beautiful. The boy asked his father. "Who  11  
so much for me? I could never do enough for him." "It's a secret," said his father quietly.
     The years kept their secret, but the day did come. It was one of the  12  days for the son. He stood
with his father over his mother's casket (棺材).  13 , the father raised the mother's long thick hair to  14 
 that the mother had no ears!
     "Mother said she was happy that she never had her hair  15 ," he said. "And nobody had ever thought
Mother less beautiful, had they?"
( )1. A. mother     
( )2. A. hands      
( )3. A. good       
( )4. A. sang       
( )5. A. hard       
( )6. A. what       
( )7. A. repaired   
( )8. A. school     
( )9. A. Everybody  
( )10. A. big       
( )11. A. gave up   
( )12. A. best      
( )13. A. Luckily   
( )14. A. find      
( )15. A. cut       
B. baby      
B. feet      
B. poor      
B. laughed   
B. easy      
B. if        
B. found     
B. shop      
B. Nobody    
B. small     
B. picked up     
B. warmest   
B. Quickly   
B. show      
B. washed    
C. doctor    
C. ears      
C. weak      
C. talked    
C. happy     
C. that      
C. caught    
C. hospital  
C. Anyone    
C. successful
C. wrote down    
C. safest    
C. Slowly    
C. prove     
C. touched   
D. father      
D. nose        
D. lost        
D. cried       
D. busy        
D. which       
D. drawn       
D. zoo         
D. Someone     
D. unsuccessful            
D. got down    
D. darkest     
D. Politely    
D. learn       
D. kept        
问答题

火力发电厂释放的燃煤废气中含有大量的氮氧化物(NOx)、二氧化硫和二氧化碳等气体会造成环境污染.对燃煤废气进行脱硝、脱硫和脱碳等处理,可实现绿色环保、节能减排、废物利用等目的.

(1)脱硝.利用甲烷催化还原NOx,反应如下:

CH4(g)+4NO2(g)=4NO(g)+CO2(g)+2H2O(g);△H1=-574kJ•mol-1

CH4(g)+4NO(g)=2N2(g)+CO2(g)+2H2O(g);△H2=-1160kJ•mol-1

在一定条件下,甲烷直接将NO2还原为N2的热化学方程式为:______.

(2)脱碳.将CO2转化为甲醇的热化学方程式为:

CO2(g)+3H2(g)

CH3OH(g)+H2O(g);△H3

①在1L的密闭容器中,充入1molCO2和3molH2,在一定温度下,进行上述反应.测得CO2和CH3OH(g)的浓度随时间变化如图所示.

则0~10min内,H2的平均反应速率为______;达到平衡时,CO2的转化率为______;该温度下该反应的 K=______.

②取五份等体积CO2和H2的混合气体(物质的量之比均为1:3),分别加入温度不同、容积相同的恒容密闭容器中,发生上述反应,相同时间后,测得甲醇的体积分数φ(CH3OH)与反应温度T的关系曲线如图所示,则上述反应的△H3______0(填“>”、“<”或“=”).

(3)脱硫.某种脱硫工艺是将废气经处理后,与一定量的氨气、空气反应,生成硫酸铵和硝酸铵的混合物作为副产品化肥.设燃煤废气中的SO2、NO2的物质的量之比为1:1,则该反应的化学方程式为:______.

(4)硫酸铵和硝酸铵的水溶液的pH<7,其原因是______(用离子方程式表示).