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
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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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