问题 单项选择题

CT与常规X线检查相比突出的特点是()

A.空间分辨率高

B.密度分辨率高

C.曝光时间短

D.病变定位、定性明确

E.适合全身各部位检查

答案

参考答案:B

解析:CT的空间分辨率尚不及平片,常规X线检查同样适合于全身各部位,曝光时间最短者(高频机)可控制到0.5ms,CT扫描尚未达到。CT检查与常规X线检查各有其局限性,定位、定性按其检查部位只能相对比较。但CT的密度分辨率较常规检查明显提高,高约20倍。

填空题

阅读《出师表》,解释下列划线词语。

1、崩殂                                                                

2、此危急存亡之也                                        

3、追先帝殊遇                                                  

4、以先帝遗德                                                  

5、恢弘志士之气                                                  

6、陟罚臧否                                                         

7、以陛下平明之                                           

8、是以先帝简拔                                                  

9、以陛下                                                         

10、之                                                       

11、贤臣,小人                                             

12、痛恨于桓灵也                                                

13、耕                                                              

14、卑鄙                                                              

15、由是感激                                                       

16、遂许先帝                                                       

17、二十一年                                                    

18、夙夜忧叹                                                       

19、恐托付不                                                    

20、深入不毛                                                        

21、以                                                        

22、诹善道                                                        

23、临表涕零                                                        

阅读理解