单项选择题

This passage is mainly about ______.

A．information technology
B．an increasingly knowledge-intensive environment
C．a modem definition of literacy
D．effects of modern information systems on the individual

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单项选择题The underlined word perturb in the first paragraph most probably means ______.

A．modify
B．neglect
C．permeate
D．upset

单项选择题Which of the following is the best possible title for this essay

A．An Introduction to Desktop Video Conferencing.
B．Modern Office and Video Conferencing.
C．A New Solution for Office Work.
D．Face to Face with Your Partners.