太原铁路局防洪应急反应以保证旅客人身安全和铁路职工人身安全为最高原则。
参考答案：对
Open Shortest Path First(OSPF)is a (29) routing algorithm that (30) work done on the OSI IS-IS intradomain routing protocol. This routing, as compared to distance-vector routing, requires (31) processing power. The Dijkstra algorithm is used to calculate (32) OSPF routing table updates only take place when necessary, (33) at regular intervals.
30（）
A．derived from
B．deviated from
C．was derived from
D．was deviated from
当停留刹车刹住时两台发动机的N1设置不能超过：（）
A、40%
B、50%
C、75%
D、没有限制
