存著再看年 06:49 会员 Production Possibilities Curve as a model of a country’s economy | AP Macroeconomics | Khan Academy
存著再看年 06:16 会员 Changes in equilibrium price and quantity when supply and demand change | Khan Academy
存著再看年 06:15 会员 Change in supply versus change in quantity supplied | AP Macroeconomics | Khan Academy
存著再看年 08:27 会员 Change in demand versus change in quantity demanded | AP Macroeconomics | Khan Academy
存著再看年 08:51 会员 Input approach to determining comparative advantage | AP Macroeconomics | Khan Academy
存著再看年 09:55 会员 Opportunity cost and comparative advantage using an output table | AP Macroeconomics | Khan Academy
存著再看年 05:25 会员 PPCs for increasing, decreasing and constant opportunity cost | AP Macroeconomics | Khan Academy