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【多选题】
下列著名景点中, ( ) 位于美国。A.
大本钟
B.
科罗拉多大峡谷
C.
大都会艺术博物馆
D.
西敏寺
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举一反三
【单选题】If the current allocation of resources in the market for hammers is inefficient, then it must be the case that
A.
producer surplus exceeds consumer surplus in the market for hammers.
B.
consumer surplus exceeds producer surplus in the market for hammers
C.
the sum of consumer surplus and producer surplus could be increased by moving to a different allocation of resources.
D.
the costs that sellers of hammers are incurring could be reduced by moving to a different allocation of resources.
【单选题】Some of the oil fields were bombed by Iraq in case that the US obtained them in the war.
A.
Y
B.
N
C.
NG
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