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问题 单项选择题

固定-可摘联合桥

A．被称为完全固定桥的足
B．一端的固位体为固定连接，另一端的固位体为活动连接的固定桥
C．仅一端有固位体，桥体与固位体之间为固定连接的固定桥
D．以各种骨内种植体作为固定桥的支持和固位端制成的固定桥
E．可以自行摘戴的固定桥

答案

参考答案：E

完形填空
完形填空。
     Welcome to my QQ-zone (空间). This is a photo    1    my family. I have a    2    family. The middle-aged (中年的) man and woman are my parents. They are doctors. They work in the same   3    . The old man and the old woman are my grandparents. They are old and don't work. They are    4    home now. They like flowers (花) and birds (鸟). The young man is my uncle. He is my father's    5   . He    6    in No. 8 Middle School. He is a good teacher. His students like    7    very much. He often helps me    8    my English. The little girl    9    is my sister, Li Ying. She is only three years old. Do you know the boy? Guess!    10    me. I have a happy family.

( )1. A. at      
( )2. A. little   
( )3 A. class     
( )4. A. at       
( )5. A. son      
( )6. A. gives    
( )7. A. his      
( )8. A. for      
( )9. A. in yellow
( )10. A. Its     

B. of         
B. old       
B. farm      
B. on        
B. daughter  
B. comes     
B. him                  
B. at        
B. on yellow 
B. It       		C. in            
C. big           
C. hospital      
C. to             
C. sister      
C. studies        
C. he                       
C. with          
C. in a yellow   
C. It’s      		D. with             
D. small             
D. school          
D. of                  
D. brother         
D. teaches          
D. her                
D. to                 
D. on a yellow      
D. He         
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单项选择题

在电场中一端带负电荷，另一端带正电荷的电介质分子称（）

A.弹性偶极子

B.刚性偶极子

C.双向偶极子

D.位移偶极子

E.偶极子
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