单项选择题

One of the most common techniques is to add alloying elements that inhibit the corrosion.

A．restrain
B．retain
C．relieve
D．repulse
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单项选择题
The senator agrees that his support of the action would ______ his chances for reelection.
A．obscure
B．mystify
C．distinguish
D．jeopardize
单项选择题
Having liberated the player from an exclusively team performance, Louis Armstrong unwittingly codified the vocabulary of the soloist in a series of famous recordings.
A．unfavorably
B．unpopularly
C．unquestionably
D．unintentionally
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