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图1为某日地球光照图，此时6月22日，但北京已是6月23日。据此回答下列各题。 小题1:此时北京时间为 （ ） A．5时 B．19时 C．23时 D．1时 小题2:正常年份，此日前后不可能出现的地理现象是 （ ） A．江淮地区昼达到一年中最长 B．长春地区正午太阳高度达一年最大值 C．珠江口盐度较高 D．地球公转速度较慢
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举一反三
【简答题】切削速度确定后,用公式 计算主轴转速n(r/min)。
【简答题】3 ) A monopolist has demand and cost curves given by: QD = 1000 - 2P TC = 5,000 + 50Q a. Find the monopolist's profit-maximizing quantity and price. b. Find the monopolist's profit.
【单选题】A monopolist sells in two markets. The demand curve for her product is given by p1 =119-2x1 in the first market and p2 = 123-5x2 in the second market, where xi is the quantity sold in Market i and pi ...
A.
x1 = 58 and x2 = 14
B.
x1 = 29 and x2 = 12
C.
x1 = 41 and x2 = 29
D.
x1 = 39 and x2 = 10
【单选题】A monopolist has a constant marginal cost of $2 per unit and no xed costs. He faces separate markets in the U.S. and England. He can set one price p1 for the American market and another price p2 for t...
A.
be larger than the price in England by 1.
B.
be smaller than the price in England by 1.
C.
equal the price in England.
D.
be larger than the price in England by 3.
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