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问题 单项选择题

路由信息协议RIP是内部网关协议IGP中使用得最广泛的一种基于 (35) 的协议，其最大优点是 (36) 。RIP规定数据每经过一个路由器，路由跳数增加1，实际使用中，一个通路上最多可包含的路由器数量是 (37) ，更新路由表的原则是使到各目的网络的 (38) 。更新路由表的依据是：若相邻路由器X说“我到目的网络Y的距离为N”，则收到此信息的路由器K就知道：“若将下一站路由器选为X，则我到网络Y的距离为 (39) ”。

38（）

A．距离最短

B．时延最小

C．路径最空闲

D．路由最少

答案

参考答案：A

单项选择题

下列按性能命名的中药是（）。

A.决明子

B.荆芥

C.秦皮

D.厚朴
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单项选择题

Prior to the UML, there was no clear leading (111) language. Users had to choose from among many similar modeling languages with minor differences in overall (112) power. Most of the modeling languages shared a set of commonly accepted concepts that are expressed slightly differently in various languages. This lack of (113) discouraged new users from entering the OO market and from doing OO modeling, without greatly expanding the power of modeling. Users longed for the industry to adopt one, or a very few, broadly supported modeling languages suitable for (114) usage.
Some vendors were discouraged from entering the OO modeling area because of the need to support many similar, but slightly different, modeling languages. In particular, the supply of add-on tools has been depressed because small vendors cannot afford to support many different formats from many different (115) modeling tools. It is important to the entire O0 industry to encourage broadly based tools and vendors, as well as niche products that cater to the needs of specialized groups.

A．internal

B．external

C．front-end

D．back-end
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