问题 名词解释

定熵滞止参数

答案

参考答案:

将具有一定速度的流体在定熵条件下扩压,使其流速降低为零,这时气体的参数称为定熵滞止参数。

完形填空
完形填空。
Dear Bob,
       My name is Wang Jie. I want __1__ your pen pal. I live in Beijing, __2__  . I think Canada is a
  very beautiful __3__.I'm 14 years old and my birthday is __4__  September. I can __5__ a little
  English. I have __6__  brother or sister. I like to stay __7__  my classmates. We often play __8__ 
  after school, such as football, basketball, tennis and running. My favorite __9__  at school is math. I
  don't like English. It's too _10__ . Let's be good pen pals.
                                                                                                                                              Yours ,
                                                                                                                                           Wang Jie
( )1.  A. be          
( )2.  A. Shanghai    
( )3.  A. country      
( )4.  A. on          
( )5.  A. speak      
( )6.  A. a          
( )7.  A. at          
( )8.  A. the guitar  
( )9.  A. color        
( )10.A. difficult  
B. to be      
B. Singapore  
B. city        
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B. say        
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B. subject    
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