需要频繁用到数学技能，包括基本数学、预算、利润 损失概念、百分比率和差异变通等。

Need to use mathematical skills frequently, including basic mathematics, budget, profit/loss concept, percentage and difference adaptations, etc.

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本部分结合了兰州民百和活力28资产置换的案例，分析了企业采用变通的方法操纵利润的行为。

This part has combined Lanzhou Minbai and vigours 28 replacement of assets case, analysed enterprise adopt the method adapting to circumstances to control profit.

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