单项选择题

What is meant by "peer-on-peer" in the second paragraph

A．Acting as equals.
B．Peeking secretively.
C．Looking furtively.
D．Having more and mor
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In a little more than 200 years, Australia has ______ some drastic social and economic changes.
A．taken
B．made
C．got
D．seen
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The performance of a particular project is usually analyzed ______ customers needs.
A．in terms of
B．in search of
C．by means of
D．in case of
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