单项选择题
A.预约当日 B.预约当日起不超过两天 C.预约当日起不超过三天 D.预约当日起不超过五天
A.117.131.133.16 B.117.133.131.26 C.117.133.131.16 D.117.131.133.26
A.ping B.ipconfig C.tracert D.routeprint