制度学派认为：由于知识完备与信息对称几乎是不可能(成本太高)，所以，所谓的理性的经济人是不存在的，因而“经济人”的假设也是不成立的。()
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____in an atmosphere of sirmple living was what her parents wished for.
A. The girl to be educated
B. The girl’s being educated
C. The girl educated
D. The girl was educated
This is the most beautiful national park_____.I have ever visited
A. which
B. where
C. that
D. what
The environtint is everything that surrounds us: plants, animals, buildings, country, air,
A. excessively
B. distinctly
C. approximately
D. lterally
“多买少算”对商家和消费者来说，都是边际效用递减心态。()
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