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问题 单项选择题

“不入虎穴，焉得虎子”，“要想知道梨子的味道，就得亲口尝一尝”。这两句话体现的哲学原理是（）。

A.实践是认识的来源

B.实践是认识发展的动力

C.实践是检验认识正确与否的标准

D.实践是认识的目的

答案

参考答案：A

选择题

——What’s wrong with the boy?

——He is a(an) ________boy. He can’t run fast.

A．ill

B．sick

C．good

D．well
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单项选择题

One of the most widely used routing protocols in IP networks is the Routing Information Protocol (RIP)．RIP is the canonical example of a routing protocol built on the (71) algorithm．Routing protocols in internet works differ slightly from the idealized graph model．In an internet work，the goal of the routers to forward (72) to various networks．
Routers running RIP send their advertisement about cost every (73) seconds．A router also sends an update message whenever an update from another router causes it to change its routing table．
Routing protocols use different techniques for assigning (74) to individual networks．Further, each routing protocol forms a metric aggregation in a different way．RIP takes the simplest approach，with all link costs being equal (75) ．Thus it always tries to find the minimum hop route．Valid distances are 1 through 15．This also limits RIP to runing on fairly small networks．

A．Dijkstra
B．path-vector
C．link-state
D．distance-vector
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