Parents often suffer deep feelings of _______ (guilty) if their children fail to succeed, or don't turn into responsible and law abiding members of society.
【简答题】对在下面所示的路由条目中各部分叙述正确的是( ) R 172.16.8.0 [120/4] via 172.16.7.9,00:00:23, Serial0 A) R 表示该路由条目的来源是 RIP; B) 172.16.8.0 表示目标网段或子网; C) 172.16.7.9 表示该路由条目的下一跳地址; D) 00:00:23 表示该路由条目的老化时间;