如何行洞房之事
The Relationship Between Marginal Revenue & Marginal Costs | eHow小明是一個書呆子,有一天他要跟相親對象結婚,但只會唸書的他對於所謂的洞房花燭夜根本一竅不通,所以他就去問他老爸「父親,請問要如何行洞房之事呢?」而小明的父親又是一個內向的人,所以他就只好隱晦的說:「哦.........就一上一下就對了啦!」小明雖然不懂,但還是很聽話的回房間,然後花了一整天的時間..In economics and finance, businesses often need to use a number of measurements to calculate revenue and costs so that they can create strategies for maximizing profits. As ......
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