单项选择题

Perfect certainty belongs only to the gods; the rest of us have to make do with science and its（）.

A．imperfections
B．conclusions
C．methodologies
D．hyperbole
E．resignation

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单项选择题

Molds were once used only for small amounts of fat, shared with neighbors at cooperative candle dippings or supplied by（）candle makers who canvassed large geographical areas.

A．redoubtable
B．impecunious
C．sententious
D．meretricious
E．itinerant

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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