A.WHEN(时间)、HOW(方式方法)
B.WHO(主体和客体)、WHERE(地点)
C.WHY(目的性、必要性)、WHAT(目标)
D.WHERE(地点)、WANT(想法)
什么是边际转换率(MRT)?为什么一种商品对另一种商品的边际转换率等于生产两种商品的边际成本之比?
What is the marginal rate of transformation (MRT)? Explain why the MRT of one good for another is equal to the ratio of the marginal costs o[ producing the two goods.
A.For what?
B.How?
C.Why not?
D.Why?