问题 判断题

过电流继电器的线圈串在相应电动机的定子回路中,而其常闭触点却串在控制回路中,因此能保证主接触持续闭合,使电动机获得电继续运转。

答案

参考答案:对

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完形填空。
     Most children like    1   _TV. It's very interesting By _  2   _TV they can __3  _  a lot , learn a lot and
know many __ 4 _about their country and the world. Of course they canalso leam     5   the radio
(无线电) . But they can learn better and more easily   6 ___ TV , because they can hear and watch at the
same time, but they can't see __7 _over the radio. TV helps  __  8  children's eyes. TV helps to open their minds (智力) too. They learn newer and better ways of  ___things. Many children watch TV   10  _weekends. But some students watch TV every night. They usually go to bed very late. They can't have a good
rest.
( )1. A. watches  
( )2. A. watching  
( )3. A. see      
( )4. A. thing    
( )5. A. in        
( )6. A. at        
( )7. A. nothing  
( )8. A. to open  
( )9. A. do        
( )10. A. at      
B. watch    
B. watched  
B. to see    
B. things    
B. at        
B. in        
B. anything  
B. opens    
B. does      
B. in        
C. to watch  
C. watches    
C. saw        
C. something  
C. over      
C. on        
C. something  
C. opening    
C. doing      
C. on        
D. watched    
D. to watch    
D. sees        
D. anything    
D. to          
D. to          
D. things      
D. opened      
D. does        
D. to          
问答题 简答题