问题 问答题 简答题

什么是汽轮机的喷嘴调节方法?

答案

参考答案:

新蒸汽在自动主汽门后分成几股,每股蒸汽由导汽管引至一个调速汽门,经过调速汽门分别进入各喷嘴室。根据负荷的增减,依次开启或关闭各调速汽门,这样凡开满的调速汽门,节流损失可视为零,故机组的总的节流损失较小。

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完形填空
      I like my Chinese teacher very much. He is a    1    man, about 25 years old. He is tall    2   black       short hair. He is a very humorous(幽默的) person. He often    3   us jokes(笑话) and  4   to make our   class more    5   . In class, he is a very    6   teacher. If we don’t listen to him carefully, he will give us some punishment(惩罚) by   7    us some questions. But after class, he becomes a very good     8   of us. He   often talks with the girls and plays    9   with the boys. All of us really like him. He is our     10      teacher.
( )1. A. old          
( )2. A. and          
( )3. A. tells        
( )4. A. a story      
( )5. A. tired        
( )6. A. busy        
( )7. A. ask          
( )8. A. teacher      
( )9. A. a basketball
( )10. A. favorite    
B. young          
B. for            
B. says          
B. storys        
B. difficult      
B. strict        
B. asks          
B. teachers      
B. the basketball
B. the favorit e  
C. very old    
C. with        
C. speaks      
C. sto ry      
C. interesting
C. interested  
C. asking      
C. friend      
C. basketballs
C. favoritest  
D. aged        
D. at          
D. speak      
D. stories    
D. boring      
D. well        
D. asked      
D. fri ends    
D. basketball  
D. a favorite  
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