单项选择题

She gave ______ directions about the way the rug should be cleaned.

A．acute
B．brisk
C．explicit
D．energetic
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单项选择题
Our magazines try to ______ for the opinions of all walks of people.
A．cater
B．carve
C．caution
D．charm
单项选择题
Scientists' hypotheses are guesses which are already supported by a certain amount of ______ evidence, derived. from actual observation and experiment.
A．theoretical
B．psychological
C．empirical
D．emotional
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