单项选择题

Thus, global-warming skeptics write off the （） of climate research investigators, emphasizing the （） of others' reasoning, but not of their own.

A．data… accessibility
B．infighting … vagueness
C．resources … virtues
D．experiments … pragmatism
E． consensus … uncertainty

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单项选择题

Previous research has established the lupine wolf as the （） of the modern canine, but when and where humans first domesticated the former into the latter remains unclear.

A．competitor
B．ally
C．scion
D．prey
E．progenitor

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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