问题 单项选择题 A1/A2型题

如下颌双侧第二乳磨牙拔除后,其缺隙保持器不宜选择()

A.舌弓保持器

B.活动保持器

C.丝圈式保持器

D.托牙保持器

E.固定桥保持器

答案

参考答案:E

填空题
完形填空
完形填空。
  People and animals live in the same world. We should keep the balance 
   1   people and animals. If the balance destroyed, there    2   bad results to both
people and animals.Wild animals are    3   of people. We      4    protect them, or
there will be no wild animals in the future. There is a black and white animal 
   5   in China.It is always known as the national treasure (国宝)of China.
Everyone knows it is   6   Giant panda. Now there are     7    pandas than
before.     8    of them live in Sichuan and Gansu Provinces.
  There are also some other rare animals in China. However, the number 
   9    smaller and smaller than before. So people should help these animals. They
are   10   disappearing from the world.
( )1. A. between    
( )2. A. could be    
( )3. A.friend      
( )4. A. has to      
( )5. A. lives      
( )6. A. call        
( )7. A. few        
( )8. A. Most        
( )9. A. is become    
( )10. A. in dangerous
B. among    
B. is        
B. enemy      
B. must      
B. lived    
B. name      
B. less      
B. Many      
B. is becoming
B. in danger  
C. in        
C. will be    
C. enemies    
C. needs to  
C. living    
C. calling    
C. fewest    
C. More      
C. become    
C. in danger of
D. along        
D. may be      
D. friends      
D. have        
D. to live      
D. called      
D. more        
D. The most    
D. become      
D. out of danger