问题 问答题 简答题

推车极限信号误发处理方法?

答案

参考答案:

(1)梯形图中点右键解除锁定。

(2)适当调整延时。

(3)解开引线,取下开关,重新安装。

单项选择题
完形填空
完形填空。
     Swimming is very popular in summer. People like swimming in summer because water makes them
  1     cool. If you like swimming but swim in a    2_ place, it may not safe. These years, more than ten
people    3   while they were enjoying themselves in the water and _4 _ of them were students. But some
people are _5   not careful in swimming.They often think they swim so   6   that nothing can happen to
them in water. Summer is here again. If you go swimming in summer, don't forget _7    better swimmers
have died in water.They died because they were not careful,not because they    8    swim. So don't get
into water when you are alone   9  there is a "No swimming" sign, don't get into water, 10  . If you
remember these, swimming will be safer.
( )1. A. felt      
( )2. A. difficult
( )3. A. died      
( )4. A. much      
( )5. A. yet      
( )6. A. fast      
( )7. A. what      
( )8. A. couldn't  
( )9. A. Because  
( )10. A. either  
B. feel    
B. small  
B. die    
B. most    
B. already
B. often  
B. that    
B. wouldn't
B. Though  
B. nor    
C. feeling  
C. right    
C. have died
C. lot      
C. still    
C. well      
C. which    
C. needn't  
C. Whether  
C. also      
D. to feel
D. wrong  
D. will die
D. more    
D. even                 
D. hard    
D. who    
D. mustn't
D. If      
D. too