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2019年上半年 上午试卷 综合知识
第 75 题
章/节 专业英语  
 
 
（ ） is a fast，cheap and convenient way to send and receive messages internationally.
 
  A.  Telephone
 
  B.  Mail
 
  C.  E-mail
 
  D.  Postcard
 
 




 
 
相关试题     专业英语 

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When you create an account，you are typically asked to enter a user ID and（ ）.

  第72题    2020年下半年  
A（ ）is a computer system or program that automatically prevents an unauthorized person from gaining access to a computer when it is connected to a network such as the Internet.




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