不知道有沒有今天考的CDer碰到第一題數學問題是: the ratio of the numer of the top to the numer of the bottom is 4: 3 , 從top removed from 8 books, the ratio 比是 4:5 ,how many books befor removed 8 books??? answer: 36 / 72/ 108 / 144/ 288 想求解?? 謝謝大家了!!今天一戰太沮喪了~~決定重新振作!! 希望大家加油!!!