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问题 单项选择题

路由器在网络中( )。

A．识别的是数据帧的物理地址

B．识别的是数据包的网络地址

C．既不识别物理地址，也不识别网络地址

D．识别的是逻辑地址

答案

参考答案：B

解析： 路由器工作网络层，它根据目的IP地址来确定如何转发分组。

单项选择题

案例：某年某月某日，某镇煤矿发生瓦斯爆炸事故，事故死亡29人。该煤矿上年产量3万吨，税利60万元；企业上年平均职工人数是105人，工作日数是300天，这次事故因人身伤亡所支出的费用是640万元，善后处理费用是130万元，财产损失价值达280万元，停产、减产损失价值20万元，资源损失价值30万元。（说明：本题前5道题为单选题，后3道题为多选题。）

这次事故造成的间接经济损失是()万元。

A．30

B．50

C．55.2

D．331.4

E．381.4
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问答题

The potential of computers for increasing the control of organizations or society over their members and for invading the privacy of those members has caused considerable concern.
The privacy issue has been raised most insistently with respect to the creation and maintenance of data files that assemble information about persons from a multitude of sources. Files of this kind would be highly valuable for many kinds of economic and social research, but they are bought at too high a price if they endanger human freedom or seriously enhance the opportunities of blackmailers. (2) While such dangers should not be ignored, it should be noted that the lack of comprehensive data files has never before been the limiting barrier to the suppression of human freedom.
Making the computer the villain in the invasion of privacy or encroachment on civil liberties simply diverts attention from the real dangers. Computer data banks can and must be given the highest degree of protection from abuse. (3) But we must be careful, also, that we do not employ such crude methods of protection as to deprive our society of important data it needs to understand its own social processes and to analyze its problems.
Perhaps the most important question of all about the computer is what it has done and will do to man’s view of himself and his place in the universe. (4) The most heated attacks on the computer are not focused on its possible economic effects, its presumed destruction of job satisfaction, or its threat to privacy and liberty, but upon the claim that it causes people to be viewed, and to view themselves, as ’machines’.
What the computer and the progress in artificial intelligence challenge is an ethic that rests on man’s apartness from the rest of nature. An alternative ethic, of course, views man as a part of nature, governed by natural law, subject to the forces of gravity and the demands of his body. (5) The debate about artificial intelligence and the simulation of man’s thinking is, in considerable part, a confrontation of these two views of man’s place in the universe.
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