单项选择题

PERTURB: SERENITY ::

A. denounce : rant
B. interdict : protection
C. purify : imperfection
D. vex : irritation
E. fondle : attachment
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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
单项选择题
An excellent philatelist can detect a forged______with a single glance, for a true specimen bears markings and characteristics, without exception, that the______invariably lacks.
A. painting… imitation
B. insect… approximation
C. coin… original
D. stamp… facsimile
E. treatise … falsehood
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