电子邮件系统中,哪一项负责进行报文转换,以实现不同电子邮件系统之间的通信A.报文存储 发布时间:2017-06-24 07:50 │ 来源:www.tikuol.com 题型:单项选择题 问题: 电子邮件系统中,哪一项负责进行报文转换,以实现不同电子邮件系统之间的通信A.报文存储器B.报文传送代理C.用户代理D.网关
题型:单项选择题 The car accident happened _____ his car was out of order ___ I can’t drive.A.not that; but thatB.not only; but alsoC.not because; but becauseD.not because; but as 查看答案