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Today's Date: 2006 年 9 月 12 日 星期二
Today's Weather: 晴天  |
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標題 : 星期一二...'' 心情:
星期一係911...''
放佐學1b人...302 -口-''
mschan同以前一樣咁好笑 -口-''
勁!" 有成30幾個人黎咁制.....''
今日..冇乜野.....溫緊econ...借d位黎...''
Opportunity cost is defined as the highest - valued option forgone.
Free good is sufficient to satisfy human wants...no opportunity cost....''
it is free of charge.....''
economics good is insufficient to satisfy human wants ,involed opportunity cost
always has the market price .''
唔知岩唔岩呢 -___-?
其他既等陣溫....'' 走!"
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現在的時間是 : 2006-09-12 10:06 PM
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