电子邮件地址格式正确的是() 6-2-260了解
(A)user@mail_server_name
(B) user_mail@server_name
(C) @user_mail_server_name
(D) user_mail_server_name@
参考答案
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(A)user@mail_server_name
(B) user_mail@server_name
(C) @user_mail_server_name
(D) user_mail_server_name@