单项选择题

The first paragraph aims to tell the reader ______.

A．the importance of information-resource management
B．the relationship between the medium and information
C．the great variety of media for holding information
D．the numerous resources of information
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单项选择题
In he third paragraph scientific technology is ______.
A．the application of scientific knowledge to the skills of industry
B．the application of science and industry to daily life
C．science and industry' as the basis of progress
D．the use of science and industrial techniques in gaining control of the universe
单项选择题
The main idea of the last paragraph is that ______.
A．paper record is the most convenient medium for later reference
B．electronic mail costs less than postage to mail paper memos
C．different media for information may be selected for different purposes
D．by using different media, a firm can create various information for its objectives
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