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问题 单项选择题

根据许又新的发展标准，评估心理健康水平时应该对个体心理发展状况进行（）分析。

A．项目

B．横向考察

C．背景

D．纵向考察

答案

参考答案：D

解析：

许又新提出心理健康可以用三类标准去衡量，即体验标准、操作标准、发展标准。发展标准即着重对人的个体心理发展状况进行纵向考察与分析。

填空题

在自然数中，最大的三位数是______，最小的二位数是______，它们相差______．
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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 ___25___ algorithm. Routing protocols in intemetworks differ slightly from the idealized graph model. In an internetwork, the goal of the routers to forward packets to various ___26___.

Routers running RIP send their advertisement about cost every ___27___ seconds. A router also sends an update message whenever an update from another router causes it to change its routing table.

It is possible to use a range of different metrics or costs for the links in a routing protocol. RIP takes the simplest approach, with all link costs being equal ___28___. Thus it always tries to fend the minimum hop route. Valid distances are 1 through ___29___. This also limits RIP to running on fairly small networks.

28（）

A.1 

B.15 

C.16

D.length of the link
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