问题 完形填空
完形填空。
     Different things usually stand for different feelings. Red, for example, is the color of fire, heat, blood and
life. People say red is an exciting and active color. They associate red with a strong feeling like  1 . Red is
used for signs of   2 , such as STOP signs and fire engines. Orange is the bright, warm color of  3  in autumn.
People say orange is a  4  color. They associate orange with happiness. Yellow is the color of  5 . People say
it is a cheerful color. They associate yellow too, with happiness. Green is the cool color of grass in  6  . People
say it is a refreshing color. In general, people   7  two groups of colors: warm colors and cool colors. The
warm colors are red, orange and  8  . Where there are warm color and a lot of light, people usually want to
be  9 . Those who like to be with  10   like red. The cool colors are  11  and blue. Where are these colors,
people are usually worried. Some scientists say that time seems to  12  more slowly in a room with warm
colors. They suggest that a warm color is a good  13  for a living room or a  14  . People who are having a
rest or are eating do not want time to pass quickly.   15   colors are better for some offices if the people
working there want time to pass quickly.
( )1. A. sadness  
( )2. A. roads     
( )3. A. land   
( )4. A. lively    
( )5. A. moonlight
( )6. A. summer   
( )7. A. speak     
( )8. A. green  
( )9. A. calm    
( )10. A. the other
( )11. A. black  
( )12. A. go round
( )13. A. one    
( )14. A. factory 
( )15. A. Different
B. anger  
B. ways    
B. leaves  
B. dark   
B. light   
B. spring  
B. say    
B. yellow  
B. sleepy  
B. another  
B. green   
B. go by   
B. way    
B. classroom
B. Cool   
C. administration 
C. danger      
C. grass       
C. noisy       
C. sunlight    
C. autumn       
C. talk about   
C. white       
C. active      
C. other one     
C. golden      
C. go off      
C. fact       
C. restaurant   
C. Warm        
D. smile      
D. places     
D. mountains  
D. frightening
D. stars      
D. winter     
D. tell       
D. gray       
D. helpful    
D. others                                      
D. yellow     
D. go along   
D. matter     
D. hospital   
D. All        
答案

1-5   BCBAC    6-10   BCBCD     11-15   ABBCB

选择题
填空题

汽车尾气中的NOx是大气污染物之一,科学家们在尝试用更科学的方法将NOx转化成无毒物质,从而减少汽车尾气污染。

(1)压缩天然气(CNG)汽车的优点之一是利用催化技术能够将NOx转变成无毒的CO2和N2

①CH4(g)+4NO2(g) 4NO(g)+CO2(g)+2H2O(g)  △H1<0

②CH4(g)+4NO(g)2N2(g)+CO2(g)+2H2O(g)    △H2<0

③CH4(g) +2NO2(g)N2(g) +CO2(g) +2H2O(g) △H3         。(用△H1和△H2表示)

(2)在恒压下,将CH4(g)和NO2(g)置于密闭容器中发生化学反应③,在不同温度、不同投料比时,NO2的平衡转化率见下表:

投料比[n(NO2) / n(CH4)]400 K500 K600 K
160%43%28%
245%33%20%
 

①写出该反应平衡常数的表达式K=         

②若温度不变,提高[n(NO2) / n(CH4)]投料比,则K将         。(填“增大”、“减小”或“不变”。)

③400 K时,将投料比为1的NO2和CH4的混合气体共0.04 mol,充入一装有催化剂的容器中,充分反应后,平衡时NO2的体积分数        

(3)连续自动监测氮氧化物(NOx)的仪器动态库仑仪的工作原理示意图如图1

图1                                    图2

①NiO电极上NO发生的电极反应式:                                

②收集某汽车尾气经测量NOx的含量为1.12%(体积分数),若用甲烷将其完全转化为无害气体,处理1×104L(标准状况下)该尾气需要甲烷30g,则尾气中V(NO)︰V(NO2)=   

(4)在容积相同的两个密闭容器内 (装有等量的某种催化剂) 先各通入等量的CH4,然后再分别充入等量的NO和NO2。在不同温度下,同时分别发生②③两个反应:并在t秒时测定其中NOx转化率,绘得图象如图2所示:

①从图中可以得出的结论是

结论一:相同温度下NO转化效率比NO2的低

结论二:在250℃-450℃时,NOx转化率随温度升高而增大,450℃-600℃时NOx转化率随温度升高而减小

结论二的原因是                                                    

②在上述NO2和CH4反应中,提高NO2转化率的措施有_________。(填编号)

A.改用高效催化剂     B.降低温度     C.分离出H2O(g)       D.增大压强

E.增加原催化剂的表面积   F.减小投料比[n(NO2) / n(CH4)]