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问题 单项选择题

褶皱是指岩石中的各种面（如面理、层理等）的弯曲而显示的变形。在未确定地层面向方向时，褶皱的基本形态用（）和（）予以描述。

A.向斜，背斜

B.向形，背形

C.向斜，背形

答案

参考答案：B

完形填空
完型填空。

     I live in a small doll's house. My master is a girl __1__ Danielle. She loves me very __2__. She puts
beautiful clothes on me and combs (梳) my hair every day．
     I look like a girl from the Tang Dynasty (唐朝) of China. My clothes are red and blue. I __3__ gold
shoes and small gold hair clips.
     Danielle is going to take me __4__ Japan for the Doll Festival. I can see many dolls there.
     Sometimes I feel __5__ because I am Danielle's only doll. I have no __6__. and I never see any other
dolls. I want to have doll friends and talk __7__ them. I want to talk about our clothes, houses and livers.
I want to __8__ the Japanese dolls a lot of questions. I want to ask the Kokeshi dolls (小木偶) why they
have no arms or legs. They are usually __9__. I like to talk to young dolls.
     Danielle says I can meet some boys'dolls __10__ the festival too. I hope I can make friends with some
of them.

( )1. A. called    
( )2. A. much      
( )3. A. wear      
( )4. A. on        
( )5. A. happy    
( )6. A. family    
( )7. A. about    
( )8. A. have      
( )9. A. old women
( )10. A. at       		B. is called    
B. many        
B. put          
B. by          
B. interesting  
B. arms        
B. with        
B. answer      
B. little girls
B. on           		C. is call
C. more    
C. dress  
C. in      
C. sad    
C. friends
C. out    
C. tell    
C. old man
C. in      		D. call    
D. any    
D. dress up
D. to      
D. good    
D. colours
D. of      
D. ask    
D. parents
D. to      
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单项选择题

tRNA分子上3′端CCΑ－OH的功能为（）

A.辨认tuRNA上的密码子

B.提供－OH基与氨基酸结合

C.被剪接的组分

D.形成局部双链

E.供应能量
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