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问题 单项选择题

某低压用户的额定电压为380V，而实际电压为370V，该用户的电压偏差为（）。

A、10V

B、–10V

C、–2.63%

D、2.63%

答案

参考答案：C

完形填空
完形填空
       Li Lei, look _1  this picture. This is a   2  of a classroom. In the picture you can see chairs   3   desks. On the blackboard, you can see a tree. A map is   4   the-door. The room is different from    5   classroom. Under the   6   desk, there is a football,   7   you can't see it. The boy in the hat is my friend, Jack. He is a
new student. He is   8   American. Helooks   9   Kate. But they are not   10   .
( )l. A. in          
( )2. A. map        
( )3. A. or          
( )4. A. behind      
( )5. A. yours      
( )6. A. teacher's  
( )7. A. so          
( )8. A. a          
( )9. A. at          
( )10. A. boys       		B. on          
B. picture      
B. and          
B. in          
B. my          
B. teachers'    
B. or          
B. an          
B. the same    
B. twins        		C. at                
C. room              
C. but              
C. at                
C. me                
C. teacherof        
C. but              
C. the              
C. like              
C. students          
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填空题

当出现飞车或发生其他危及人身安全及设备危险时，应立即（）和进气气路紧急停车。
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