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问题 单项选择题

下列关于局部排风罩的说法中错误的是( )。

A．接受式排风罩与外部吸气罩的根本区别在于罩外气流的成因
B．排风罩造成控制风速随控制距离增加而迅速衰减
C．由于密闭罩将有害物源密闭于罩内，故不需要排风
D．吹吸式排风罩在控制距离较大时有其优越性

答案

参考答案：C

完形填空
完形填空。
     John is a Canadian. He lives in a tall building. He gets up at    1    every morning. He    2    home at
seven o'clock. And he gets to school at seven forty.
     He has    3    classes in the morning and two in the    4   . After school, he likes to play volleyball    5   
his classmates. He goes home at five thirty    6   . He and his    7    have dinner    8    home.    9    he does
his homework. He goes to    10    at around nine thirty.
     What a busy day!
( )1. A. six fourty    
( )2. A. goes          
( )3. A. eight        
( )4. A. morning      
( )5. A. and          
( )6. A. a.m.          
( )7. A. teachers      
( )8. A. at            
( )9. A. When          
( )10. A. bed          		B. six forty  
B. gets        
B. ten        
B. evening    
B. with        
B. p.m.        
B. mothers    
B. in          
B. Then        
B. the bed     		C. seven fourteen
C. comes          
C. four          
C. night          
C. to            
C. in afternoon  
C. parents        
C. out            
C. How            
C. a bed          		D. seven forty    
D. leaves        
D. twelve        
D. afternoon      
D. like          
D. in the morning
D. students      
D. behind        
D. Why            
D. beds          
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单项选择题

经过审核但还没有记账的记账凭证发现有错误，应该( )。

A．直接进行修改
B．取消审核后修改
C．不能进行修改
D．用红字冲销法修改
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