干线电缆列调备、闭塞分别在第几组？
参考答案：列调备用：Ⅰ2；闭塞：Ⅲ1
---Nick, would you mind out of the bathroom?
--- Sorry. I won't be long.
A. come B. to come C. coming
在点一点网络中，分组从通信子网的源节点到达目的结点的路由是由______决定的。
