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A user states that email is not being received. Which of the following protocols should thetechnician check for incoming mail?（）
- A、SMTP
- B、POP3
- C、NNTP
- D、HTTP
参考答案
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The user changed the attributes of the files.C
The user copied the files from the local My Documents folder.D
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“Sometimes computers are just strange, but it seems to be working now.”B
“You gave them the wrong address and caused this problem.”C
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