问题 问答题 简答题

透视和摄片各有何优缺点?

答案

参考答案:

(1)透视的优点:

①可任意转动病人进行多轴透视观察。

②可观察活动器官的运动功能。

③操作简单、费用低廉。

④立即可得检查结果。

⑤可在透视监护下进行介入性操作。

(2)透视的缺点:

①细微病变和厚实部位不易被透视观察清楚。

②不能留下永久性纪录。

(3)摄片的优点:

①影像清晰,反衬度较好。

②适于细微病变和厚密部位观察。

③留有永久性纪录,供复查对比、会诊讨论之用。

(4)摄片的缺点:

①不便于观察活动器官的

运动功能。

②技术复杂,费用较高。③出结果时间较长。

由上可知,透视的优点是摄片不足之处,而摄片的优点正是透视的缺点。二者只有取长补短,配合使用,才能充分发挥其诊断作用。

完形填空
完形填空。
         Antarctica is the continent which is the most     1     area of land on the
Earth and is mostly covered     2      ice. This is    3      of the driest and     4  
 in the world. But people from all over the world come to     5    there. Near
the South Pole, three   6      people live together in a place     7    Amunsen-
Scott Station.
         The station has libraries, cinemas, shops, sports rooms, canteens and laboratories (实验室). There is
electricity (电), and they have     8     the system that they use to have a conversation (交谈)    9     someone in
another place. And they have     10     electronic machines that stores information and uses programs to help the
m find, organize, or change the information.
         But the people here     11    travel by car, or train, or bus, because there aren't any roads or railways near
the station. They travel by ship, helicopter, plane, or snow tractor, or    12      dogs.
         There aren't    13      trees or flowers there, but there are hundreds of different birds and other animals.
          Most of the people here are    14      . They study plant and animal life
and how ice moves. The ice can tell us about changes in climate. Ray Kingman
is an expert at Amundsen-Scott Station, telling us on the phone, "This is my
second year here. It's a very interesting and beautiful place, but life is very
hard     15     . In the summer we can go swimming in hot pools of water.
We welcome newcomers here for further study of the continent!"
( )1. A. southern     
( )2. A. for          
( )3. A. a            
( )4. A. warm areas    
( )5. A. travel       
( )6. A. thousands    
( )7. A. called       
( )8. A. telephones   
( )9. A. with         
( )10. A. computers   
( )11. A. don't      
( )12. A. with        
( )13. A. much        
( )14. A. teachers    
( )15. A. in the winter
B.northern                  
B. at                         
B. that                      
B. coldest places            
B. go sightseeing           
B. thousand                 
B. call                      
B. radios                   
B. in                       
B. printers                  
B. didn't                  
B. on                       
B. any                      
B. scientists               
B. during the autumn season
C. eastern         
C. with            
C. one             
C. cool areas        
C. work           
C. thousands of    
C. calls           
C. televisions       
C. at               
C. mouse            
C. weren't        
C. in front of       
C. either         
C. doctors       
C. in all weather.
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