单项选择题


A．weaken
B．strengthen
C．widen
D．loosen
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单项选择题
A．whichB．thatC．asD．it
A．which
B．that
C．as
D．it
单项选择题
A．In regard toB．In line withC．In addition toD．By means of
A．In regard to
B．In line with
C．In addition to
D．By means of
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