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