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单项选择题

1. 非退化二阶曲线上任一点与此曲线上四个定点（顺序不变）的连线的交比为定值。
A、正确
B、错误

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多项选择题When policy － based routing (PBR) is being configured, which three criteria can the set command specify?（）

A.all interfaces in the path toward the destination
B.all networks in the path toward the destination
C.adjacent next hop router in the path toward the destination
D.all routers in the path toward the destination
E.all interfaces through which the packets can be routed
F.type of service and precedence in the IP packets

单项选择题以下（）事件的发生会让进程从运行状态转变为等待状态。 A. 被高优先级进程抢占 B. 时间片到 C. 执行I O D. I O执行完成