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问题 多项选择题

为了减轻高压空冷碳钢管线受腐蚀程度，延长其使用寿命，可以采取的措施有（）

A.应采用管箱结构，而不应在空冷器管束上使用回弯头

B.在管箱上的所有管子的入口加上不锈钢衬套

C.对于多片管束组成的空冷器，其空冷器入口物流应采取对称平衡的分配方式进行配管布置，以利流体分配均匀

D.应在高压空冷的上游注水，以防铵盐沉积

答案

参考答案：A, B, C, D

完形填空
完形填空。

      Mr. Roy likes to travel    1   in his spare time. He likes to sit beside the window and look the scenery
 through the window when he is on a train. One day he went to travel himself. He   2   a seat near windows
as soon as he got on the train. He found that all of window seats were taken. He went on another railway
carriage. He found out one. There was a young man sitting in the seat   3   this one. Mr. Roy was happy
that the young man hadn't   4   the seat by the window. He went to the seat quickly. When he   5   it, Mr.
Roy saw that there was a piece of paper   6   some words on the seat. It said,"This seat is broken. You can't
take it, Please find another seat. Thank you.""A broken seat on a train? Is that   7   ?" Mr. Roy said   8   sadly,
but he walked on and found   9   empty seat. It isn't beside a window. He had to sit in. When the train would
  10  , a very beautiful girl got on the train. The young man quickly took the paper off the seat beside his as
soon as he saw her, and let the girl sit in during the whole trip.

( )1. A. by bus    
( )2. A. found out
( )3. A. on      
( )4. A. sat      
( )5. A. reached   
( )6. A. and       
( )7. A. good      
( )8. A. loudly  
( )9. A. other     
( )10. A. reach  

B. by train    
B. found        
B. beside    
B. taken        
B. arrived       
B. with       
B. comfortable
B. happily      
B. others      
B. stop        		C. by ship       
C. looked for      
C. in            
C. put          
C. saw             
C. for           
C. dangerous     
C. to the young man
C. another         
C. begin         		D. by plane   
D. looked       
D. under       
D. seen         
D. got           
D. of         
D. possible    
D. to himself
D. the other     
D. got        
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问答题 简答题

什么是毛管水？有几种类型，为什么说毛管水是土壤中最宝贵的水分？
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