搜题请搜索小程序“爱下问搜题”
问题 问答题 简答题

减温器安装在高温段过热器出口的缺点？

答案

参考答案：

1、高低温段过热器均在减温器之前，当蒸汽超温时，高低温段过热器均不能得到减温器的保护。

2、因此，只适用于汽温较低，过热器没有过热危险的低压锅炉。

完形填空
完形填空。
     Bill likes football very much, and he often goes to watch matches in our    l   on Sundays. He doesn't get the best seats,      2    they are very     3     and he doesn't see his friends there.
     There was a big football match in our town last Sunday.     4    , it was very cold and cloudy, but then the sun     5     , and it was very hot.
     There were a lot of people on benches (凳子)     6     Bill at the match. Bill was on one bench, and there was a fat man on a bench   7  him. At first the fat man felt cold,   8 then he felt very hot. He took his coat off and put it in front of him, but it fell on Bill's head. Bill was not angry. He took the coat   9  his head, looked at it and then laughed and said," Thank you ,but       10     are the trousers?"
( )1. A. village        
( )2. A. so              
( )3. A. dear            
( )4. A. At  that time  
( )5. A. was shining    
( )6. A. in the front of
( )7. A. behind          
( )8. A. why            
( )9. A. away            
( )10.A. how             		B. country      
B. if            
B. cheap        
B. Then          
B. shining      
B. in the back of
B. beside        
B. but          
B. from          
B. when          		C. town    
C. because  
C. nice    
C. At first
C. shone    
C. around  
C. over    
C. and      
C. on      
C. where    		D. home    
D. but      
D. near    
D. First    
D. shines  
D. near    
D. with    
D. so      
D. off      
D. whose    
   
查看答案
单项选择题

在进行保护管配管时，要注意保护管内径和管内穿电缆数。通常电缆的直径之和不能超过保护管内径的（）。

A.1/3

B.1/2

C.2/3

D.1/4
查看答案