已知集合A={x||2x-1|<6},B={x|2x+13-x≤0},则A∩CR

题型:选择题

问题:

已知集合A={x||2x-1|<6},B={x|
2x+1
3-x
≤0}
,则A∩CRB=(  )
A.(-
5
2
,-
1
2
]∪(3,
7
2
)
B.(-
5
2
,-
1
2
)∪[3,
7
2
)
C.(-
1
2
,3]
D.(-
1
2
,3)
考点:集合间交、并、补的运算(用Venn图表示)
题型:选择题
完形填空。
     A group of graduates, highly established in their careers, got together to visit their old university professor.
They talked about the present-day   1   topic-Happiness. But the conversation soon turned into complaints
about   2   in work and in life. To offer his guests coffee, the professor went to the kitchen and   3   with a
large pot of coffee and different types of   4   -plastic, glass, crystal, some nice-looking, some plain-looking,
some expensive, some cheap-telling them to help   5   to the coffee.   6   all the students had a cup of coffee
in hand, the professor said, "If you   7  , you might find all the nice-looking, expensive cups are taken up,
with the plain and cheap ones   8  . While it is   9   for you to want only the best for yourselves, that is the
source of your  10  and stress. In fact, the cup itself adds no  11  to the coffee. What all of you  12  wanted
was coffee, not the cup, but you consciously went for the best cups and were  13  each other's cups."
     "Now  14  this: Life is the coffee and the jobs, money and position in  15  are the cups. They are just tools
to  16  and contain life, and the types of cups do not decide or  17  the quality of life we live. Sometimes,
focusing on the cup makes us  18  to enjoy the coffee itself. So, don't let the cups drive you. Enjoy the coffee 
 19 ."
     The  20  people don't have the best of everything. They just make the best of everything.
( )1. A. warm       
( )2. A. progress   
( )3. A. cooked     
( )4. A. cups       
( )5. A. them       
( )6. A. Before     
( )7. A. saw        
( )8. A. left behind
( )9. A. helpful    
( )10. A. habit     
( )11. A. quality   
( )12. A. nearly    
( )13. A. looking   
( )14. A. consider  
( )15. A. school    
( )16. A. check     
( )17. A. correct   
( )18. A. fail      
( )19. A. too       
( )20. A. busiest   
B. hot          
B. plans     
B. passed       
B. plates    
B. themselves 
B. Since      
B. suggested  
B. got away    
B. normal      
B. courage    
B. weight     
B. finally    
B. eyeing      
B. repeat     
B. thought     
B. create     
B. change     
B. stop       
B. either     
B. cleverest
C. heavy       
C. disasters
C. returned     
C. bowls     
C. you         
C. When        
C. proved      
C. put away    
C. safe        
C. fear       
C. colour      
C. really   
C. saying       
C. do       
C. society       
C. measure   
C. bring     
C. dislike      
C. also      
C. happiest
D. sensitive     
D. stress       
D. provided       
D. tables    
D. yourselves             
D. Because        
D. noticed     
D. sent back      
D. popular        
D. problem     
D. cost           
D. quickly   
D. feeling         
D. recite     
D. dream           
D. hold        
D. record      
D. struggle        
D. instead    
D. kindest   
题型:选择题

(14分)研究CO2与CH4的反应使之转化为CO和H2,对减缓燃料危机,减少温室效应具有重要的意义。

(1)已知:①2CO(g)+O2(g)=2CO2(g) △H=-566 kJ·mol-1

               ②2H2(g)+O2(g)=2H2O(g) △H=-484kJ·mol-1

               ③CH4(g)+2O2(g)=CO2(g)+2H2O(g) △H=-802kJ·mol-1

则CH4(g)+CO2(g)2CO(g)+2H2(g) △H=  kJ·mol-1

(2)在密闭容器中通入物质的量浓度均为0.1mol·L-1的CH4与CO2,在一定条件下发生反应CH4(g)+CO2(g)2CO(g)+2H2(g),测得CH4的平衡转化率与温度、压强的关系如下图所示。

据图可知,P1、P2、 P3、P4由大到小的顺序  

‚在压强为P4、1100℃的条件下,该反应5min时达到平衡点X,则用CO表示该反应的速率为       。该温度下,反应的平衡常数为       。 

(3)CO和H2在工业上还可以通过反应C(s)+H2O(g) CO(g)+H2 (g)来制取。

①在恒温恒容下,如果从反应物出发建立平衡,可认定平衡已达到的是       

A.体系压强不再变化

B.H2与CO的物质的量之比为1 :1

C.混合气体的密度保持不变

D.气体平均相对分子质量为15,且保持不变② 在某密闭容器中同时投入四种物质,2min时达到平衡,测得容器中有1mol H2O(g)、1mol CO(g)、

2.2molH2(g)和一定量的C(s),如果此时对体系加压,平衡向    (填“正”或“逆”)反应方向移动,第5min时达到新的平衡,请在下图中画出2~5min内容器中气体平均相对分子质量的变化曲线。

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A.无菌动物

B.无菌动物引入已知细菌

C.清洁动物

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E.无特殊病原体动物

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