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Function: require_once
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1前言 演示（presentation）的重要性正在与日俱增。向顾客提建议方案自 不待言，公司内部的演示也在不断增加，而且这种方式今后只会越来越 普遍。大家现在将本书拿在手中，也是因为亟须制作演示方案的缘故 吧。 作为讲解演示技巧的指南书...
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