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问题 选择题

用圆规画一个周长是9.42厘米的半圆，圆规两脚之间的距离是（　　）

A．3厘米

B．1.5厘米

C．9.42厘米

D．1.83厘米

答案

9.42÷（3.14+2）

=9.42÷5.14，

≈1.83（厘米）；

故选：D．

单项选择题

有以下程序main(){int a[4][4]={{1,4,3,2},{8,6,5,7},{3,7,2,5},{4,8,6,1}},i ,k,t；for(i=0；i<3；i++)for(k=i+1；k<4；k++)if(a[i][i]

A．6,2,1,1,

B．6,4,3,2,

C．1,1,2,6,

D．2,3,4,6,
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单项选择题 共用题干题

Astute service providers realize that the continued support of legacy X.25 and asynchronous network element using separate operations network is cost(16).For example,the maintenance of multiple networks can require additional staff. Often, this staff must be trained on multiple vendor technologies, sometimes requiring parallel groups specializing in each (17) .Hence, additional maintenance procedures must be maintained and administrative records are (18) .The duplication of transport facilities to carry (19)network traffic is an inefficient use of resources. And not surprisingly, more technologies installed in a central office means the necessity for more physical space, and an increase in power connections and power consumption migration of these (20) network elements to IP-based DCns is alogical strategy.

空白处（17）应选择（）

A.line

B.platform

C.sever

D.switch
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