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黄河流域用水效率的空间格局及动态演进
刘华军, 乔列成, 孙淑惠
Spatial distribution and dynamic change of water use efficiency in the Yellow River Basin
LIU Huajun, QIAO Liecheng, SUN Shuhui

图2. 黄河流域和长江经济带用水效率的演变趋势

Figure 2. Trend of change of water use efficiency in the Yellow River Basin and the Yangtze River Economic Belt