单项选择题

What does the word "chronic" (Sentence 3) mean

A．painful.
B．persistent.
C．minor.
D．infectious.
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单项选择题
The effect of becoming depressed about an illness is ______.
A．a slowing of the body's curative processes
B．a collapse of the autonomic nervous system
C．an emotional state that ranges from extremes of depression to happiness
D．an evident and gradual decrease in the physical symptoms of the disease
单项选择题
Doctors who prescribe placebos are ______.
A．risking harm to their patients
B．prolonging their patients' agonies
C．curing over 50 percent of serious diseases
D．helping their patients psychologically
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