单项选择题

The primary objective of Basic Econometric, is to provide an elementary but a comprehensive introduction to the art and science of econometrics.

A．brief
B．precise
C．simplified
D．extensive
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单项选择题
Both a person's heredity and his environment help to shape his character.
A．relative
B．education
C．nationality
D．surroundings
单项选择题
The United States Food and Drag Administration has shown itself to be particularly wary with regard to alleged miracle drugs in recent times.
A．bellicose
B．exhausted
C．cautious
D．strange
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