单项选择题

RUBBER: TIRE ::

A． skin : hair
B． silver : cutlery
C． window : pane
D． erosion : iron
E． piece : paper
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单项选择题
PERTURB: SERENITY ::
A． denounce : rant
B． interdict : protection
C． purify : imperfection
D． vex : irritation
E． fondle : attachment
单项选择题
Of the various schemes that have been proposed to model how gene transcription might work in the living body, those involving actual physical contact between enhancers and genes remain______, owing to an absence of direct evidence.
A． surreptitious
B． decipherable
C． vindicated
D． suspicious
E． speculative
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