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2016年上半年 上午试卷 综合知识
第 74 题
章/节 专业英语  
 
 
Make (74) copies of important files, and store them on separate locations to protect your information.
 
  A.  back
 
  B.  back-up
 
  C.  back-out
 
  D.  background




 
 
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（ ）acts as an interface between computer hardware and users。

  第73题    2016年上半年  
When you use a computer to create, edit, and print documents, (73) is used.




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