问题 问答题 简答题

为什么说电容式变送器是优于力平衡式变送器的新一代变送器?

答案

参考答案:

电容式变送器突破了传统的机械力变送器的结构和原理,无机械传动和机械反馈部分,结构简单,性能优良,使用方便,是优于力平衡式变送器的新一代变送器。

选择题
完形填空
完型填空。
    As darkness fell, hundreds of people in the Swiss village left their houses. They were looking   1   at the
mountain top in the distance. It was covered with   2  -beautiful and dangerous.   
    The huge mountain is called Matterhorn. Mountain climbers had   3   the top, using the southern route
(路线). But no one had ever dared to try a winter climb up the   4   side. But now one man was daring to try
the   5   route. He was Walter Bonatti, a great mountain climber from Italy.   
    For two days he had climbed. The village people had   6   him anxiously (焦急地). Now   7   were waiting
to see his signal (信号). If he planned to go on the next day, he would light a   8   signal. A red light would
mean that he was   9  .   
    A tiny green light  10  high on the mountain side. Bonatti was not giving up! The people  11 .   
    The next day he continued his way upward. He was so lonely and so  12 ! But he would not  13 . Again
that night he lit the green light.   
    In the morning, Bonatti  14 . He could not see the top, but he knew he was surely there. Though the climb
was  15 , he moved up. Bonatti had spent months  16  for the climb. Was the training enough? Did he have
the strength (力量) and skill to climb to the top?   
    He was finally at the  17 ! News about his  18  was radioed to the world.   
    The trip along the southern route was easy. He was warmly  19  in the village. He had done the " 20 ", and
would be well remembered as a climber of all time.
( )1. A. back       
( )2. A. flowers    
( )3. A. watched    
( )4. A. western    
( )5. A. difficult   
( )6. A. heard     
( )7. A. they        
( )8. A. red        
( )9. A. turning back 
( )10. A. fell       
( )11. A. cheered   
( )12. A. upset     
( )13. A. give up   
( )14. A. woke up    
( )15. A. grateful    
( )16 A. training    
( )17. A. home        
( )18. A. success    
( )19. A. persuaded  
( )20. A. necessary  
B. forward   
B. ice and snow   
B. passed      
B. northern   
B. different  
B. looked      
B. we         
B. green      
B. moving up  
B. rose       
B. cried      
B. excited    
B. give in     
B. turned up  
B. painful   
B. preparing  
B. ruin        
B. thing      
B. injured    
 B. important  
C. up         
C. green trees  
C. reached   
C. southern   
C. same        
C. watched   
C. he          
C. white      
C. arriving    
C. turned      
C. jumped      
C. tired      
C. give out    
C. got up      
C. reliable   
C. planning   
C. top       
C. climb      
C. refused    
C. great      
D. down         
D. rocks        
D. walked       
D. eastern      
D. easy         
D. saw          
D. you          
D. yellow       
D. in danger    
D. settled      
D. shouted      
D. happy        
D. give off     
D. looked up                   
D. cruel        
D. asking       
D. end          
D. failure      
D. welcomed     
D. impossible