原帖由 marcochl 於 18/11/2006 21:50 發表 係quantity demanded According to The Law of Demand when Quantity demanded decreases, supply remains unchange, the price will drop if the price drops, the quantity demanded will increase h ... 其實呢,quantity demanded(需求量)只會因為佢自己既價格而改變。 上文我並無提及正版帶本身的價格有變。 |