单项选择题

Few mathematicians are______their futures on finding any such proof；instead, their efforts are focused on finding good, but not______, solutions for most cases, a field of study aptly known as approximation theory.

A．betting… perfect
B．developing … convenient
C．pinning … substandard
D．destroying … exact
E． establishing … vague
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单项选择题
The language of the bureaucrats and administrators must needs be recognized as ______of legal parlance, for there is no other way to explain its pedantic,______and pernicious style.
A．an outgrowth… pervicacious
B．a visitation … rotten
C．a rejection … vitriolic
D．a permutation … heedless
E． a divagation … rapturous
单项选择题
A gulf remains between negotiators from the rich world, who are so skeptical they hope to see the treaty's ambitious provisions______, and those from poor countries, who want them______.
A．explicated… ignored
B．diluted … strengthened
C．absconded… delivered
D．reinforced… removed
E． relaxed… loosened
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