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本文根据建设项目四个阶段投入要素不同，分析了各阶段对项目经济评价的影响，提出了各阶段经济评价的方法。“,”Based on the different elements of the four stages of the construction project economic, this paper analysis the factors of the four stagesi of the projects, Then, this paper put forward the method of the economic evaluation on the construction project..