jz12345 发表于 2015-1-24 08:43 
oc是你做出的选择 的付出 和你其它的最优的一个选择的收益。所以上学的机会成本是包括学费书费的。
谢谢回答,
那请问
The opportunity cost of attending college is likely to be highest for a high school graduate:
A) who has access to student loans.
B) whose family is extremely wealthy.
C) who will attend a more expensive college.
D) who started a successful business in high school.
这个为什么不选c?谢谢