FTP协议使用的公开端口为A.TCP端口21 B.UDP端口20 C.TCP端口16 发布时间:2018-06-17 18:26 │ 来源:www.tikuol.com 题型:单项选择题 问题: FTP协议使用的公开端口为A.TCP端口21B.UDP端口20C.TCP端口161D.UDP端口162
题型:单项选择题 His father looks young, but in fact he is ______. A.in the forties B.in his fortiesC.in the fortyD.in his forty 查看答案