为何一个企业的短期平均总成本和长期平均总成本不一致?
How and why does a firm 's average-total-cost curve differ in the short run and in the long run ?
在短期内公司的平均成本和产量会各有什么变化?
Now what happen to the firm 's average cost and the quantities it produces in the short run , respectively ?( 2 points )