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沉筒式液位计干校过程中不取下下一段时，仪表应指示的液位多少？取下下一段时，仪表又应指示的液位多少？

答案

参考答案：

分别指示液位的0%和100%．

补全对话，情景问答
从B栏中找出与A栏相对应的答案。
           A                                  
( )1.  Do you want to go to a movie?      
( )2.  What kind of movies do you like?    
( )3.  When is I4inda'S birthday?          
( )4.  Who is Peter Johnson?              
( )5.  What kind of vegetables do you like?
( )6.  Where are my balls?                
( )7.  How much are the green shirts?      
( )8.  Let's go to the movies.            
( )9.  How old is she?                    
( )10.  What color do you like?            		     B                            
A.  Her birthday is October l5th.
B.  No, that sounds boring.      
C.  Thrillers.                    
D.  Blue.                        
E.  No, I don't.                  
F.  They are under the bed.      
G.  She is twelve.                
H.  He is a great actor.          
I.  They are ten dollars.        
J.  Broccoli.                    
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问答题 简答题

简述空气制动阀电空位操纵时中立位的作用？
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