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问题 选择题

下列化学用语对应正确的是

A．CH4分子的比例模型：

B．CCl4的电子式：

C．H2O2的结构式：H-O-O-H

D．乙酸的最简式：C2H4O2

答案

答案：C

题目分析：A选项为球棍模型,B选项的Cl最外层没有达到八个电子的稳定结构,D选项是乙酸的分子式而不是最简式。乙酸的最简式为CH2O所以D选项是错误的

完形填空
完形填空。
     December 2lst was Becky's fourteenth birthday.    1   she got home after
school, she saw her parents in the living room. They said to her, "Happy birthday, dear! We have a present     2   you, Becky. Go and look for it in your
bedroom. "
     Becky ran quickly to her room. On her bed she saw a bright red box. She
thought that her present must be in the box. She   3   it. There was nothing but a card in it. The girl took it out and read:
     "Dear Becky, I'm your present. My first three letters are    4  _ as in the
word 'come'. My 5   letters are the same as in the word 'water'. My middle 3
letters are in the word  'put'.  6   am I?"
    Becky thought    7   and soon smiled. She then went back -to the living
room and shouted, "Aha, I know what present it is. Thank you very much:
Mum and Dad! But where is it? Her mother answered, "Look on the back of
the card. " Becky   8   and read, "Come and look for me in the study. "
    Becky hurried to    9  . There on the desk she    10    her present. What was
it? Do you know?
( )1. A. When          
( )2. A. with          
( )3. A. closed        
( )4. A. same          
( )5. A. two            
( )6. A. Where          
( )7. A. hard          
( )8. A. turned it over
( )9. A. study          
( )10.A. received       		B. Before        
B. at            
B. looked for    
B. different    
B. the two last  
B. When          
B. hardly        
B. turned over it
B. studies      
B. found         		C. After        
C. for          
C. opened      
C. the different
C. the last two
C. How          
C. difficult    
C. put over it  
C. the study    
C. got          		D. As        
D. from      
D. got        
D. the same  
D. last two  
D. What      
D. friendly  
D. put it over
D. studying  
D. read      
  
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单项选择题

一般存款账户不得办理（）业务。

A、现金缴存

B、现金支取

C、借款归还

D、电汇
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