问题 名词解释

微生物处理

答案

参考答案:

原理是利用微生物产生纤维素分解酶使纤维素分解成纤维二糖和葡萄糖。目前这是一个热门。关键在于解决产纤维分解酶多的菌株。利用常规细菌筛选育种的方法,很难获得产酶量高,生产成本低的菌种。可望利用现代生物技术中的DNA重组法能解决生产成本高的问题。

完形填空
完形填空。
     The Western world has  always  been  divided  into  two  types  of people-the cool and the uncool.
It is a   1    that starts in school. The cool kids are good at sports. They are    2    with the opposite sex.
They are goodlooking and people want to    3    their style. They can do their homework but they don't  
  4    a big effort. That would not be cool.
     The uncool kids are in the   5   of the playground. They are very bright,but they don't have great 
    6  skills and they are   7   at sports. When they are not programming computers or doing calculus
(微积分) in their heads, they are reading comic books and watching shows   8    the X Files. They
are   9   as the geeks (怪人).
     Here are the geeks. The geeks are taking over (占上风). Make friends with them now   10    they
will put virus in your computer and    11    your math homework to ruin. Geeks might not be popular at
school, yet they do pass their examinations, and they might not be too popular at university, but    12   
good degrees.
     The most important    13    of the 21st century, computers and IT, has been at least partly created
by geeks. Geek heroes like Bill Gates   14     others to follow their examples. Being a geek is a way of
earning good money. And the creation of the Internet gave them a   15    of their own to work and play
in,making them a global force.   16  , the effect of the geeks   17   popular culture has started a new
trend. It is now cool to be    18  . Geek culture is becoming an important part of general popular
culture, in which what you know is more important than   19    you look like.
But there are also   20  . Geeks were often bullied (欺侮) or laughed at in school. Now a geek may be
your boss. Perhaps it is time for punishment.
( )1. A. division  
( )2. A. pleasant  
( )3. A. take    
( )4. A. have    
( )5. A. corner  
( )6. A. operating
( )7. A. good     
( )8. A. like    
( )9. A. admired  
( )10. A. and     
( )11. A. put     
( )12. A. win    
( )13. A. industry
( )14. A. excite  
( )15. A. room    
( )16. A. Somehow  
( )17. A. in      
( )18. A. rich    
( )19. A. how     
( )20. A. risks  
B. part        
B. popular    
B. act        
B. suffer      
B. team        
B. speaking    
B. active      
B. for        
B. thought    
B. so          
B. place      
B. take        
B. progress    
B. discourage  
B. world      
B. However    
B. of          
B. uncool      
B. that        
B. questions  
C. class      
C. crazy      
C. copy       
C. support    
C. group     
C. social    
C. hopeless    
C. such      
C. known      
C. or         
C. bring      
C. wish      
C. discovery    
C. demand    
C. chance    
C. Though    
C. on        
C. attractive  
C. how much  
C. shortcomings
D. habit          
D. particular    
D. advance        
D. make          
D. center        
D. experimental  
D. sharp          
D. as            
D. treated        
D. that          
D. take          
D. finish        
D. improvement    
D. promise        
D. heaven        
D. Besides        
D. for            
D. handsome      
D. what          
D. chances        
单项选择题 配伍题