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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单项选择题
If you ______ someone, you form a fixed general idea or image of them, so that you assume that they will behave in a particular way.
A．assimilate
B．simulate
C．stereotype
D．subordinate
单项选择题
There are some ______ between their two descriptions; we are puzzled which we should believe.
A．discrepancies
B．distractions
C．diversions
D．discretions
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