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本文通过对当前公路建设投资来源渠道以及各种来源渠道资金的成本分析，阐 述了如何选择最佳投资来源组合以求得最大经济效益。
Based on the analysis of the current sources of investment in highway construction and the cost of funds from various sources, this paper elaborates how to choose the best combination of investment sources in order to obtain the maximum economic benefits.