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问答题
简述什么是DOL、DFL并介绍其基本原理？
答案：
答案：DOL和DFL是财务分析中的两个概念，分别代表经营杠杆（Degree of Operating Leverage，...
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问答题
Which of the following languages were and are used as Lingua Franca in history and at present?
答案：
答案：A. Latin, B. French, C. English 解析：历史上和现在，以下语言被用作通用语（Lin...
