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问题 填空题 案例分析题

豌豆的黄色和绿色分别由遗传因子Y、y控制，圆粒和皱粒分别由遗传因子R、r控制。根据下列豌豆两对相对性状的杂交实验结果，回答以下问题：

F1全为黄色圆粒，说明（）对（）为显性，（）对（）为显性。黄；绿；圆；皱（可颠倒）

答案

参考答案：黄；绿；圆；皱（可颠倒）

单项选择题

用RSA算法加密时，已知公钥是(e=7，n=20)，私钥是(d=3，n=20)，用公钥对消息M=3加密，得到的密文是 (9) 。

A．7
B．12
C．13
D．19
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完形填空
完形填空。

     The trip to that city was eye-opening for everyone, and near its end, all the young people in our group
began to reflect on what it had meant. We   1   the first night we had arrived. We had all gone into the markets
of the city   2   the young people could experience its energy. But what we actually saw simply   3   us all—
the rundown houses, the children in rags, the people begging for money … Walking home,   4   under a low
bridge, we came across   5   families of homeless people seeking a bit of dry ground to sleep on   6   the night.
We had to step over bodies as we found our way through the darkness.
     The poverty (贫困) was   7    than anything my young companions had ever imagined. Back in the hotel,
an air of sadness settled over the group. Many   8   and cried. Spending time in this   9   moves a person to
care about humanity.
     That evening, our group spent hours talking about what we had  10 . Gently, I encouraged everyone to talk
about the difficult  11  that day’s discoveries had inspired. Sitting together  12  a circle as everyone had a
chance to speak, we all began to realize that  13  of us was alone in our struggle to cope with our reactions.
     Based on my  14  in poverty-stricken areas, I suggested that  15  the emotions we had were painful, they
could also be important in helping us to move forward. We all  16  that we had seen things that should never
be allowed to happen.  17 , what could we do about it? Together, we began to brainstorm ways we could help
to ease the  18  we had seen. As I encouraged group members to focus on  19  they could do, a sense of
determination  20  the previous sadness. Instead of despair, these young people began to feel a call to action.

( )1. A. put up with  
( )2. A. now that     
( )3. A. puzzled      
( )4. A. marching     
( )5. A. entire       
( )6. A. beyond       
( )7. A. stronger     
( )8. A. gave up      
( )9. A. environment  
( )10. A. inspected   
( )11. A. feelings    
( )12. A. along       
( )13. A. neither     
( )14. A. experiences 
( )15. A. once        
( )16. A. supposed    
( )17. A. Surely      
( )18. A. burden      
( )19. A. how         
( )20. A. replaced     		B. got back to 
B. so that     
B. annoyed     
B. running     
B. normal      
B. with        
B. deeper      
B. broke down    
B. hotel       
B. attempted   
B. decisions   
B. around      
B. either      
B. schedules   
B. while       
B. advised     
B. Rather      
B. suffering   
B. where       
B. changed      		C. looked back on  
C. as if          
C. embarrassed    
C. passing        
C. average        
C. till           
C. worse          
C. set off        
C. house          
C. witnssed       
C. thoughts       
C. by             
C. none           
C. data           
C. since          
C. confirmed      
C. Now            
C. anxiety        
C. what           
C. covered         		D. made up for 
D. even if     
D. shocked     
D. moving      
D. general     
D. for         
D. less        
D. held on     
D. background              
D. challenged  
D. impressions 
D. in          
D. each        
D. position    
D. unless      
D. agreed      
D. Indeed      
D. difficulty  
D. when        
D. improved    
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