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问题 单项选择题

支气管哮喘急性发作的肺功能异常主要表现为（）

A.最大通气量增加

B.第一秒钟用力呼气容积减少

C.肺活量减少

D.弥散量下降

E.功能残气减少

答案

参考答案：B

完形填空
完形填空。
       I work in the school library. There are many kinds of   1    in it. For example, books about English,
  science, history, music,    2  . You   3    do some reading or borrow (借入) books from it But there are
  some   4   . You must obey (遵守) them.
       When you are reading in the library, you have to    5  quiet. Don't talk loudly  6  make any
  noise (喧哗). You    7   listen to music, either(也). You    8   take your bag or wet umbrellas into the
  library.    9   or drink in the library. You can borrow books from the library,   10  you can't lend (借出)
  them to others. You have to take good care of (好好保管) them and return them on time (按时归还).
  If the library books are lost, you have to pay for them.
( )1. A. people      
( )2. A. so no      
( )3. A. can        
( )4. A. magazines  
( )5. A. be          
( )6. A. and        
( )7. A. don't      
( )8. A. aren't      
( )9. A. No eating  
( )10.A. but         		B. books      
B. as well    
B. have to    
B. rules      
B. are        
B. but        
B. can't      
B. don't      
B. Not eat    
B. if          		C. magazines    
C. and so on    
C. can't        
C. CDs          
C. /            
C. or          
C. have to      
C. can't        
C. Don't eat    
C. or           		D. newspapers  
D. as well as  
D. don't        
D. problems    
D. have        
D. also        
D. can          
D. can          
D. Can't eat    
D. and          
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单项选择题

在Visual FoxPro的数据库表中只能有一个( )。

A．候选索引

B．普通索引

C．主索引

D．惟一索引
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