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问题 单项选择题

（）是指对于生产上关键设备，通过检查，有计划地安排设备停机，更换已磨损零部件进行调整修复，使设备停机损失最小。

A.改革维修

B.维修预防

C.事后修理

D.预防维修

答案

参考答案：D

单项选择题 A1/A2型题

肺动脉造影时肺栓塞的主要表现哪项不正确（）

A.肺动脉一支或分支内有充盈缺损

B.某一支肺动脉分支完全阻断

C.肺动脉主干有扩张

D.某一局部肺动脉延迟充盈

E.肺动脉局部有狭窄
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改错题
下面短文中标有题号的十行中均有一处错误，请先用底线标明，然后将改正后的答案写在相应题号后的
横线上。
     This winter, my mother and I go back to my   
Hometown to celebrate a Spring Festival    
Together with my grandmother.           
     Having been away to my hometown       
for several year, I knew very little     
about them. I was surprised to find      
which great changes had taken place there.  
I met much of my old friends and        
play together with them. I also learned a lot 
during my stay here. Summer holiday is coming
, or I am going to spend my holiday there.   		1______
2______

3______
4______
5______
6______
7______
8______
9______
10______
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