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问题 单项选择题

当扫描器扫读条码符号时，光敏元件将扫描到的光信号转变为模拟电信号，模拟电信号经过放大、滤波、整形等信号处理，转变为（）

A.图象信号

B.数字信号

答案

参考答案：B

完形填空
完形填空。
     Wang Lin is thirteen years old. He lives in the countryside in Shandong Province. Today is his   1  .
His parents cook a nice dinner for him, but the boy says, "I won't have the dinner   2   after the dinner
today is over. And my parents are   3   Guangzhou tomorrow. I don't want them to go."
     It is the   4   birthday Wang Lin spends with his parents these three years. In the past three years,
his parents   5   in Guangzhou and worked to make monkey. Tomorrow they will   6   leave home to
go to Guangzhou.
     Wang Lin is not the only stay-at-home child. In the countryside of China, there are   7   20,000,000
children staying at home without their parents. Stay-at-home children face a lot of problems. Many of 
  8   stay with their grandparents. They get less care from parents. They feel   9  . Some of them don't
study well because their parents can't help them  10  their lessons. 
    The Chinese government (政府) now cares about the children very much and is trying to solve (解决)
their problems.
( )1. A. time         
(     )2. A. so            
(     )3. A. looking for 
(     )4. A. one          
(     )5. A. stayed       
(     )6. A. get to       
(     )7. A. a number of  
(     )8. A. them         
(     )9. A. surprised    
( )10. A. at            		B. birthday     
B. because      
B. waiting for  
B. first        
B. kept         
B. forget to    
B. more than      
B. they         
B. unhappy      
B. with          		C. festival    
C .although    
C. leaving for 
C. two         
C. played      
C. have to         
C. too many    
C. we          
C. interested  
C. for          		D. class    
D. but      
D. coming to
D. a second                       
D. had      
D. ask to   
D. much too 
D. us       
D. excited  
D. on       
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判断题

智育是社会主义现代化建设的重要条件和保证。
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