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【单选题】
用干胶法制备植物油乳剂时,初乳中油、水、胶的比例是A.
1:2:1
B.
2:2:1
C.
3:2:1
D.
4:2:1
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【判断题】For a cartel behaving like a pure monopoly, equating marginal revenue to marginal cost maximizes profit over and above the perfectly competitive profit.
A.
正确
B.
错误
【单选题】Pure monopoly is characterized by
A.
many firms that produce a homogeneous product
B.
many firms that produce slightly different products that are close substitutes
C.
such a small number of firms that each must figure out how the others will respond to its own actions
D.
one firm, with no competitors, that produces a product with no close substitutes
【单选题】It is reported ________great changes have been made.
A.
which
B.
that
C.
while
D.
what
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