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问题 单项选择题

流体各部分之间发生相对位移所引起的热传递过程是（）。

A、热辐射

B、热传导

C、热对流

D、散热

答案

参考答案：C

完形填空
完形填空.

Dear editor,
    I have a big    1  and I need your help.  My mother doesn't    2   me listen to pop music.  But I love
pop music and I enjoy    3     it very much. My mother throws my    4     posters and CDs away. She
tells me that I should study    5    to get high grades.  What should I do?
                                                                                                                                                  Mary
Dear Mary,
    It's    6  to do fun things as well as homework.    7    your mother only wants the best for you.Try
    8 to her. Tell her that you have finished homework.  Then ask her    9   you can listen to the music
when you have finished. This way, the music becomes your reward for    10    hard.
                                                                                                                                             Cynthia

( )1. A. problem  
( )2. A. ask      
( )3. A. speaking  
( )4. A. favorite  
( )5. A. hardly    
( )6. A. bad      
( )7. A. And      
( )8. A. saying    
( )9. A. if        
( )10.A. listening 		B. chance      
B. tell        
B. listening to
B. worst        
B. hard        
B. angry      
B. But          
B. talking    
B. that        
B. working     		C. change          
C. let             
C. listening      
C. bad            
C. fast          
C. good          
C. So             
C. speaking    
C. why              
C. playing   
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单项选择题

下列选项不是病原体初步诊断的是（）

A.直接染色镜检

B.特异性抗原检测

C.血清学检测特异性IgG和（或）IgM抗体

D.借助分子生物学方法检测病原体核酸

E.分离鉴定病原体及药敏试验
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