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The results of Pearson correlation, principal component analysis, and cluster analysis showed that heavy metals originated mainly from industrial and domestic sources, geochemical environments, and agricultural activities, indicating that heavy metals in the Weihe River sediments were influenced significantly by anthropogenic activities. The results are expected to provide a scientific basis for the development and utilization of the Weihe River water resources.In this paper, we estimate the price and income elasticities for gasoline demand i
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