问题 问答题 简答题

革兰染色的主要步骤、结果及实际意义是什么?

答案

参考答案:

(1)革兰染色基本步骤:涂片、干燥、固定,初染:结晶紫lmin;媒染:卢戈氏碘液lmin;脱色:95%乙醇0.5min;复染:稀释复红lmin。

(2)结果革兰阳性菌呈紫色,革兰阴性菌呈红色。

(3)意义:经革兰染色可将细菌分为G+菌和G-菌,有助于鉴定细菌,用来指导临床选择药物,有助于研究和了解细菌的致病性等

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     Computer hackers (黑客) have now got their hands on mobile phones. A phone virus (病毒) can   1   your
phone do things you have no control over, computer security (安全) experts   2   . It might   3   the White
House or the police, or forward your personal address book to a marketing company. Or it could simply eat
into the phone's operating software, turning it   4   and erasing your personal information. Similar viruses have
already made mobile phone owners   5   . in Japan and Europe.
     Ari Hypponen, chief technical officer of a computer security in Finland, said a virus can get your   6   and
send them elsewhere. And it can record your   7   . Mobiles are now able to surf the Net, send emails and  8   
software, so they are an easy   9   for the same hackers who have sent viruses to computers over the last
decade. "It's technically   10   now," said Stephen Trilling, director of research at anti-virus  11  maker
Symantec Corp based in the US."If the phone is connected to the  12  , it can be used to transmit threats and
  13   targets, just as any computer can."
     In Japan, if you opened a certain email message   14   your mobile, It would cause the phone to repeatedly 
  15   the national emergency number. So phone operators had to   16   emergency calls until the bug was
 17  .
     In Europe, mobile's short message service,   18   SMS, has been used to send codes that could damage
phones.
     Mobile users can  19   viruses, of course, by sticking to their traditional phones   20   Web links, some
experts said.
( )l.  A. get       
( )2. A. speak     
( )3. A. lead      
( )4. A. off       
( )5. A. interested
( )6. A. messages  
( )7. A. voice     
( )8. A. make      
( )9. A. job       
( )10. A. impossible
( )11. A. hardware 
( )12. A. computer 
( )13. A. strike   
( )14. A. in       
( )15. A. send     
( )16. A. cancel   
( )17. A. removed  
( )18. A. and      
( )19. A. stop     
( )20. A. beyond   
B. force        
B. talk         
B. cause        
B. out          
B. angry        
B. passage      
B. passwords    
B. destroy      
B. task         
B. possible     
B. software     
B. television   
B. visit      
B. by           
B. dial         
B. ban          
B. cleaned      
B. nor          
B. avoid        
B. with       
C. make    
C. tell    
C. control 
C. down    
C. excited 
C. news    
C. music   
C. download
C. mission 
C. useful  
C. computer
C. Internet
C. inquire 
C. on      
C. count   
C. stop    
C. called  
C. or      
C. kill    
C. over    
D. damage         
D. say            
D. call           
D. on             
D. terrified      
D. information    
D. address        
D. develop        
D. target         
D. valuable       
D. equipment      
D. radio          
D. attack         
D. with           
D. press          
D. prevent        
D. cleared        
D. but            
D. find           
D. without      
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