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问题 单项选择题

肛管括约肌功能主要依靠

A．内括约肌

B．肛提肌

C．外括约肌

D．肛管直肠环

E．外括约肌线部

答案

参考答案：D

单项选择题

在城市规划和建设中，一定要把环境效益摆在首位，同时兼顾经济效益。当经济效益与环境效益发生矛盾时，应坚决服从环境效益。这是因为城市建设是百年大计，城市环境一旦遭到破坏就很难恢复，有时甚至无法恢复，而造成长时期的灾难性后果。 下列陈述，符合文意的是( )。

A．城市建设要体现发展经济为中心

B．一般来说，城市不应作为经济中心

C．在城市建设中，环境效益是第一位

D．经济建设破坏城市环境将无法避免
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     At the beginning of this century, medical scientists made an interesting discovery: we are built not just of
flesh and blood but also of time. They were
     __1__ to show that we all have 6'a body clock"   2__  us. which controls the    3_   and fall of our
body energies,   4_  us different from one day to the next.
     The   5 _ 0f "a body clock" should not be too   6 _ since the lives of most living things are controlled 
  7   the 24-hour night-and-day cycle. We feel    8  and fall asleep at night and become   9__ and
energetic during the day.lf the
     24-hour-cycle is  _10 , most people experience unpleasant   11 .For example, people who are not   12
to working at night can find that  13__ of sleep causes them to  14 _ badly at work.
        15 the daily cycle of sleeping and   16 , we also have other cycles which   17  longer than one day.
Most of us would    18 that we feel good on some days and not so good on   19  ; sometimes our ideas
seem to flow and at other times, they _20__ do not exist.
( )  1. A. anxious    
( )  2. A.inside      
( )  3. A. movement    
( )  4 A. showing    
( )  5. A. invention  
( )  6. A. difficult  
( )  7. A. from        
( )  8. A. dull        
( )  9. A. regular     
( )10. A. disturbed  
( )11. A. moments    
( )12. A. prevented  
( )13. A. miss        
( )14. A. perform    
( )15. A. With        
( )16. A. working    
( )17. A. repeat      
( )18. A. agree      
( )19. A. other      
( )20. A.just        		B. able      
B. around    
B. supply    
B. treating  
B. opinion    
B. exciting  
B. by        
B. tired      
B. excited    
B. shortened  
B. feelings  
B. allowed    
B. none      
B. show      
B. As well as
B. moving    
B. remain    
B. believe    
B. the other  
B. only       		C. careful    
C. between    
C. use        
C. making      
C. story      
C. surprising  
C. over        
C. dreamy      
C. lively      
C. rested      
C. senses      
C. expected    
C. lack        
C. manage      
C. Except      
C.living      
C. last        
C. realize    
C. all other  
C. still       		D. proud          
D. on            
D. rise          
D. changing      
D. idea          
D. interesting    
D. During        
D. peaceful      
D. clear          
D. troubled      
D. effects        
D. used          
D. need          
D. control        
D. Rather than    
D. waking        
D. happen        
D. allow          
D. others        
D. yet            
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