二、某書商想增加其總收入,其中一項方案是對每一本銷售之書籍提供20%的折扣。 他面對的客戶有以下兩類,下表分別為價格折扣前後,A雨類消費者對於書籍 的需求量。【題組】a.請用中點法分別計算A、B兩類消
7.________________ You can find the answer to your problem in the F_______ly Asked Questions (FAQ) s
13.________________ In order to understand what the teacher says, your full attention is r_______ed.