如果下图表示的是某条河流不同年代的流量年变化曲线则在这期间该河流域可能�修建了水利工程 �开辟了运输线�加固了防洪大堤 �流域内植被遭到破坏 Template




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tomski如果下图表示的是某条河流不同年代的流量年变化曲线则在这期间该河流域可能�修建了水利工程 �开辟了运输线�加固了防洪大堤 �流域内植被遭到破坏 coloring