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 result of this biochemical test has caused an uproar, and ever since its publication, researchers have been full of responses of（）quality: whereas some deal with the test’s implications in a calm manner, others sound alarms.

A．choleric
B．admonitory
C．whimsical
D．homogenous
E．variable
单项选择题
IMPUDENT:
A．thoughtful
B．convincing
C．developed
D．methodical
E．deferential
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