问题 问答题 简答题

热力除氧遵循的基本原理有哪些?需要满足哪些基本条件?

答案

参考答案:

道尔顿分压定律,亨利定律;除氧水必须被加热到饱和温度,及时排出析出的气体,扩大除氧水与加热蒸汽的接触面积,除氧水与加热蒸汽有足够的换热时间,运行中保持除氧压力的稳定。

完形填空
完形填空。
   Mrs. Ball had a son. His name was Mick. She   1   him very much and as he was not a   2   child, she
was always   3   that he might be ill,   4   she used to take him to see the best   5   in the town four times
a year to be looked   6  .
   During one of these   7 , the doctor gave Mick all kinds of tests and then said to him, "Have you had
any   8   with your nose or ears recently?" Mick   9  for a second and then answered, "Yes, I   10 ."
   Mrs. Ball was very  11 . "But I'm sure you have  12  told me that, Mick!" She said worriedly. "Oh, really?"
Said the doctor  13 . "And what trouble have you with your nose and ears, my boy?" "Well," answered Mick,
"I always have trouble with them when I'm  14  my sweater off, because the  15  is very tight."
( )1. A. loved  
( )2. A. rich   
( )3. A. afraid  
( )4. A. which   
( )5. A. player  
( )6. A. round   
( )7. A. talks   
( )8. A. answer  
( )9. A. waited  
( )10. A. did   
( )11. A. excited 
( )12. A. already
( )13. A. angrily 
(    )14. A. turning 
(    )15. A. collar  
B. hated    
B. clever   
B. surprised 
B. for     
B. teacher  
B. over     
B. years   
B. thing   
B. thought  
B. will     
B. interested    
B. just     
B. seriously 
B. taking   
B. nose     
C. missed   
C. strong   
C. glad    
C. but    
C. doctor   
C. for    
C. visits  
C. word    
C. stood   
C. have    
C. pleased     
C. never   
C. happily  
C. keeping  
C. mouth   
D. cared      
D. happy      
D. sure       
D. so         
D. lawyer     
D. after      
D. stays      
D. trouble    
D. looked                    
D. do         
D. surprised  
D. always     
D. carefully  
D. putting    
D. ear        
单项选择题 B型题