以下______不是网络操作系统。A.Unix B.Linux C.Windows 发布时间:2017-06-15 06:37 │ 来源:www.tikuol.com 题型:单项选择题 问题: 以下______不是网络操作系统。A.UnixB.LinuxC.Windows 2000D.Dos
题型:单项选择题 ---- Did you visit the Big Ben in London?---- No, we ______ it, but we spent too much time shopping.A.could visitB.could have visitedC.must ahave visited itD.can have visited 查看答案