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【判断题】
The front desk is the only place to pay the bill.A.
正确
B.
错误
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举一反三
【单选题】The existence of external economies of scale _______.
A.
tends to result in large profits for each firm.
B.
may be associated with a perfectly competitive industry.
C.
cannot be associated with a perfectly competitive industry.
D.
tends to result in one huge monopoly.
【简答题】External economies外部经济
【单选题】The existence of external economies of scale
A.
may be associated with a perfectly competitive industry.
B.
cannot be associated with a perfectly competitive industry.
C.
tends to result in one huge monopoly.
D.
tends to result in large profits for each firm.
E.
focuses more on individual firms than the industry as a whole.
【单选题】External economies of scale ( )
A.
may be associated with a perfectly competitive industry.
B.
cannot be associated with a perfectly competitive industry.
C.
tends to result in one huge monopoly.
D.
tends to result in large profits for each firm.
【单选题】The existence of external economies of scale
A.
focuses more on individual firms than the industry as a whole.
B.
tends to result in one huge monopoly.
C.
tends to result in large profits for each firm.
D.
cannot be associated with a perfectly competitive industry.
E.
may be associated with a perfectly competitive industry.
【简答题】外部规模经济(external economies of scale)
【单选题】In the presence of external economies of scale, trade
A.
may or may not improve welfare in both countries.
B.
will unambiguously improves welfare in both countries.
C.
will unambiguously worsens welfare in both countries.
D.
will unambiguously worsen welfare in the exporting country and improve welfare in the importing country.
E.
will unambiguously improve welfare in the exporting country and worsen welfare in the importing country.
【简答题】设微分方程通解为y=C 1 +lnC 2 x，试讨论怎样给定初始条件，可得唯一特解，以及特解的定义域．
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