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【简答题】
侧脑室的脑脊液经________流入第三脑室,由第三脑室经______至第四脑室。
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皮皮学刷刷变学霸
举一反三
【简答题】蒸发器控制阀损坏或调节不当,会造成( )
【单选题】If a monopolist could sell 5 units at $6 and 6 units at $5:
A.
marginal revenue for the 6th unit is $5.
B.
marginal revenue for the 6th unit is zero.
C.
demand is unit elastic over that range of prices.
D.
both (b) and (c) are true.
【单选题】For a single-price monopolist to sell one more unit of a good, it must
A.
lower the price on just the last unit sold.
B.
lower the price on all units sold.
C.
raise the price on just the last unit sold.
D.
raise the price on all units sold.
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