justyle says
13 years ago
Production Possibilities Frontier = 指既有的生產要素和技術下，可能和不可能被生產之產品組合間的界線
justyle says
13 years ago
搞好經濟國民應盡的義務。
dreamlcli
13 years ago
好深奧
☆↖文↘☆ says
13 years ago
= ="....
立即下載
♥ 貓兒〃 says
13 years ago
(annoyed)