问题 多项选择题

鳃裂囊肿的CT征象为()

A.边界清楚、圆形或卵圆形低密度囊性肿块

B.平扫时囊壁显示欠清,增强后囊壁轻度强化

C.CT值在0~20HU,囊壁薄

D.继发感染时囊壁增厚,囊液密度增高

E.有时可见囊肿位于颈内和颈外动脉之间

答案

参考答案:A, B, C, D, E

解析:鳃裂囊肿的CT表现为:典型部位是下颌角区,可见边界清楚、圆形或卵圆形低密度囊性肿块,CT值0~20HU,囊壁薄,平扫时因囊肿壁与周围肌肉等软组织密度相近,囊壁显示欠清,增强后囊壁轻度强化,继发感染时囊壁增厚,囊液密度增高。有时可见囊肿位于颈内和颈外动脉之间,为鳃裂囊肿特征性位置。

阅读理解
完形填空。
     All over the world people enjoy sports. Sports are   1   people's health. Many people like to watch   2   play
sports games. They buy tickets   3   turn on their TV sets to sit   4   them. Sports   5   with the season. People
play   6   games in different seasons. Sometimes they play inside the room, sometimes they play outside. We
can   7   sports here and there. Some sports are rather interesting.   8   people   9   different countries cannot
understand each other, but after a game they often become very  10   to each other.
(   ) 1. A. good for 
(   ) 2. A. other    
(   ) 3. A. and      
(   ) 4. A. in front 
(   ) 5. A. change   
(   ) 6. A. same     
(   ) 7. A. see      
(   ) 8. A. Sometimes
(   ) 9. A. from     
(   )10. A. friend                         
B. good at       
B. others        
B. but             
B. in the front 
B. are          
 B. different      
B. look           
B. When         
B. to             
B. friendly                     
C. good                  
C. the other           
C. or                         
C. in the front of  
C. play                    
C. the same            
C. find                   
C.  Or                   
C. outside                 
C. friends          
D. good to         
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D. so              
D. in front of     
D. start           
D. the different   
D. watch           
D. So              
D. inside          
D. more friendly   
判断题