单项选择题

A．Take a pain reliever.
B．Let the cut dry out.
C．Keep the cut closed.
D．Go to a doctor.
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单项选择题
A．They make him feel good.B．They make no impact on him.C．They bore him.D．They make him angry.
A．They make him feel good.
B．They make no impact on him.
C．They bore him.
D．They make him angry.
单项选择题
The so-called fight-or-flight response (Para. 1) refers to ________ .
A．the biological process in which human beings’’ sense of self-defense evolves
B．the instinctive fear human beings feel when faced with potential danger
C．the act of evaluating a dangerous situation and making a quick decision
D．the elaborate mechanism in the human brain for retrieving information
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