TV
Crash Course Economics (Crash Course: Economics) (2015)
Crash Course: Economics Season 1 part of TV Series: Crash Course Economics Douban
actor:
Jacob Clifford
/
Adriene Hill
经济学是对人和选择的研究，机会成本的大小决定你的选择，稀缺性促使政府寻取正确的激励机制