搜题请搜索小程序“爱下问搜题”
问题 填空题

罐口呼出混合气速度测量储罐大呼吸损耗，其罐口呼气速度应分别在液面上升高度全程的（）、（）、（）三处各测量一次，每次测3~5min，然后根据加权算求平均值和大呼吸的次数进行计算。

答案

参考答案：25%；50%；75%

完形填空
完形填空。

      There are different kinds of trains in the world. Trains can       1       people, animals, and other things.
Some trains are      2     , the others are slow. They can reach most of the cities and towns. Some trains go
    3    the hills if they are too high to go over. In big cities, the streets are usually     4     and some cars and
buses often have to wait.
      So you can find trains under the      5       and trains on a rail above the streets. People can quickly be
brought in or taken out. Can a train run over       6     ? Yes, it can.  There are many bridges over the
rivers.  But it is not easy to      7       bridges. Today's trains have dining-rooms for people. You
may      8     something in them on the way if you are hungry. Trains are      9      to men, women and
children. Many children like to play with model trains. With the model trains they can build their own rails
and      10       thewonderful world of trains.

( )1. A. carry    
( )2. A. help      
( )3. A. through  
( )4. A. full      
( )5. A. seas      
( )6. A. water    
( )7. A. mend      
( )8. A. cook      
( )9. A. useful    
( )10.A. hate      		B. take          
B. expensive      
B. among          
B. dirty          
B. farm          
B. air            
B. watch          
B. eat            
B. polite        
B. are afraid of  		C. bring            
C. fast            
C. during          
C. free            
C. ground          
C. forests          
C. reach            
C. find            
C. bad              
C. get on well with 		D. hold      
D. empty    
D. above    
D. busy      
D. gardens  
D. mountains
D. build    
D. pick      
D. lucky    
D. enjoy    
查看答案
判断题

相同通经下，闸板阀比截止阀流动阻力大。（）
查看答案