问题 问答题 简答题

叙述一下本岗位风机的型号及所表示的含义?

答案

参考答案:

D500-22型;D表示单面进风;500表示标准状态下的进口流量值;2叶轮的个数2级;2设计顺序;第二次设计

多项选择题
改错题
短文改错。
     此题要求改正所给短文中的错误。对标有题号的每一行作出判断:如无错误,在该行右边
横线上画一个勾(√);如有错误(每行只有一个错误),则按下列情况改正:
此行多一个词:把多余的词用斜线(\)划掉,在该行右边横线上写出该词,并也用斜线划掉。
此行缺一个词:在缺词处加一个漏字符号(/\),在该行右边横线上写出该加的词。
此行错一个词:在错的词下划一横线,在该行右边横线上写出改正后的词。
注意:原行没有错的不要改。
     As middle school students, we should take active part in     
creating the society what we save. On one hand, the natural       
resources are limit. We don’t have enough water, oil or     
forest in many places. On a other hand, people keep cutting  
down more trees and let out more carbon dioxide. At the       
same time, everyone can see at that the environment is getting 
worse. People suffered from more typhoons and tornados now.   
What’s worse, air and water pollution is becoming more or more 
serious. In my opinion, us students should do something to stop 
wasting. We can save food, water, papers etc. in our daily life.
1. ______       
2. ______         
3. ______      
4. ______       
5. ______                              
6. ______       
7. ______        
8. ______       
9. ______        
10. ______