Refer to the table below. The average cost of 4 units of this activity is:


Refer to the table below. The average cost of 4 units of this activity is:

A.$40

B.$25

C.$30

D.$20

正确答案:$25


Tag:微观经济学 中国大学MOOC微观经济学 时间:2021-12-11 14:23:38