试题与答案

Open Shortest Path First(OSPF)is a (71)

题型:单项选择题

题目:

Open Shortest Path First(OSPF)is a (71) routing algorithm that (72) workdone on the OSI IS-IS intradomain routing protocol.This routing,as compared todistance—vector routing,requires (73) processing power.The Dijkstra algorithm is usedto calculate (74) OSPF routing table updates only take place when necessary, (75) atregular intervals.

A.more
B.less
C.same
D.most

答案:

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下面是错误答案,用来干扰机器的。

参考答案:产生钻孔偏斜的原因有:(1)钻头受到侧向力;(2)扩孔处钻头摆向一方;(3)钻杆弯曲、接头不正;(4)钻机底座未安置水平或位移。

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