问题 问答题 简答题

为什么阀体与喷嘴连接处会漏气着火?

答案

参考答案:

喷嘴与阀体是螺纹连接,有时加工尺寸误差的影响,造成喷嘴与阀体配合螺纹间隙过大,密封不严,引起燃气外泄而着火。

阅读理解
完形填空。
     A wolf went to a farm. It ate the farmer's  1 . The farmer was angry. He had a gun (枪). He  2  to kill
(杀死) the wolf. The wolf  3  away. It saw Mr Bell on the way. It asked the man for  4 . Mr Bell was  5 .
He helped the wolf and let it hide (藏)  6  his bag.
     The farmer  7  see the wolf and asked Mr Bell: "Did you see a wolf?"
     Mr Bell answered: "Yes, it ran to the mountain just now." 
      8  the farmer went away, the wolf jumped (跳) out of the  9  to eat Mr Bell. Mr Bell cried: "I saved (救)
you,  10  now you want to kill me. You are a  11  wolf!" At this time, the farmer  12  the gun came. He killed
the wolf and saved Mr Bell. They were  13 . And  14  knew that he did wrong.
     The story  15  us, "Never take pity on an enemy (不要对敌人仁慈)."
( )1. A. fish    
( )2. A. want     
( )3. A. run     
( )4. A. help    
( )5. A. angry    
( )6. A  on      
( )7. A. don't    
( )8. A. Before   
( )9. A. bag     
( )10. A. and     
( )11. A. good    
( )12. A. with    
( )13. A. angry    
( )14. A. the farmer
( )15. A. told    
B. vegetables
B. wanted   
B. running  
B. sheep   
B. happy    
B. in     
B. doesn't  
B. When    
B. mountain 
B. so     
B. bad    
B. had    
B. kind    
B. Mr Bell   
B. tells    
C. sheep   
C. wants   
C. ran    
C. money   
C. clever  
C. under   
C. didn't   
C. With    
C. farm   
C. but    
C. clever   
C. has    
C. happy   
C. Sheep   
C. telling 
D. fruit   
D. to want 
D. runs    
D. gun     
D. kind    
D. near    
D. did     
D. After   
D. trees   
D. because 
D. friendly                  
D. bring   
D. unhappy 
D. the wolf 
D. to tell  
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