拜托各位高手赐教！
1.If a firm produces zero output in the short run:（请解释一下）
A.
total cost equals total fixed cost.
B.
total cost is zero.
C.
marginal cost is at its maximum.
D.
total variable cost is positive.
2.As output increases, the difference between average total cost and average variable cost:
A.
increases.
B.
decreases.
C.
remains exactly the same.
D.
may increase or decrease depending on the position of the moon relative to the planet Mercury.
3.Suppose you operate a factory producing golf clubs. Your current level of output is 500 golf clubs per week. Your weekly total variable cost is $30,000. If your total cost is $40,000 per week, it follows that:
A.
the average variable cost of production per week is $80.
B.
the average fixed cost of production per week is $80.
C.
the average total cost of production per week is $80.
D.
the average variable cost of production per week is $100.
4.请问：The Principle of Diminishing Marginal Productivity 和 The Principle of Diminishing Marginal Utility有什么区别呢？
1,A.不生产任何产品,可变成本为0,总成本必然等于固定成本.
2,B.TC=FC+VC,ATC=(FC+VC)/N,AVC=VC/N.ATC-AVC=FC/N.As N increasing,the difference will decreasing.
3.C.ATC=TC/N,TC=40000,N=500,THUS ATC=80.
4.一个是边际产量递减,一个是边际效用递减.适用的情况不同.一个适用于生产者,一个适用于消费者.
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