单项选择题

Researchers have found in an initial study on six patients that electrical deep brain stimulation can dramatically________ depression that is resistant to other treatments.

A．aggravate
B．alleviate
C．aggregate
D．affiliate
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单项选择题
He was convicted of the murder, but he is still trying to ________the public that he's innocent.
A．overwhelm
B．refute
C．suppress
D．persuade
单项选择题
You should not be ________ by his bad manners since he is merely trying to attract attention.
A．disregarded
B．irritated
C．distorted
D．intervened
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