下图是配置某邮件客户端的界面，图中a处应填写（ ）。b处应填写（ ）。
问题1选项
A.abc.com
B.POP3.abc.com
C.POP.com
D.POP3.com
问题2选项
A.25
B.52
C.100
D.110
正确答案及解析
正确答案
BD
解析
暂无解析
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