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【单选题】
已知生产函数Q=f(L,K)=2KL-0.5L 2 -0.5K 3 ,假定厂商目前处于短期生产,且K=10,劳动的平均产量函数为( )。A.
AP L =-0.5L+20-50/L
B.
AP L =-0.5L+20
C.
AP L =-0.5L 2 +20L-50
D.
AP L =-L+20
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【单选题】In the long run a perfectly competitive firm operates ____ and a monopolistically competitive firm operates ____.
A.
at the efficient scale; with excess capacity
B.
at the efficient scale; at the efficient scale
C.
with excess capacity; with excess capacity
D.
with excess capacity; at the efficient scale
【单选题】Which of the following is not a characteristic of a competitive firm?
A.
There are many buyers and sellers in the market.
B.
The goods offered for sale are largely the same.
C.
Firms can freely enter or exit the market.
D.
All of the above are characteristics of a competitive market.
【单选题】As a result of product differentiation, a firm in a monopolistically competitive market:
A.
always has some market power.
B.
is very similar to a firm in a perfectly competitive market.
C.
faces a perfectly elastic demand curve.
D.
is very similar to a monopolist.
【单选题】某大型机械一次性大修理费用为8600元,耐用总台班960台班,大修理间隔台班240台班,则大修理费为()元/台班
A.
26.88
B.
25.64
C.
27.32
D.
35.83
【单选题】Which of the following is true for a monopolist but not for a perfectly competitive firm?
A.
Marginal revenue is less than price.
B.
Economic profits could be earned in the long run.
C.
Profit maximization occurs at the output level where marginal revenue equals marginal cost.
D.
(a) and (b) are true for a monopolist but not for a perfectly competitive firm.
【单选题】对尿路感染病人的健康教育中, 错误的是 A 鼓励病人多饮水, B 长期预防性服用抗生素, C 及时治疗尿路结石, D 及时治疗尿道损伤, E 保持会阴部清洁
A.
B.
C.
D.
E.
E
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