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Updating Traditional 1/50,000 Topographic Maps Using Crowd-Sourced Geodata and Free Sources Satellit
This paper addresses how open geodata and crowd-sourced geodata, and the open geoportals might be integrated with the ma......
目的 评价向大众开展膳食指南营养教育活动的效果,为有效开展营养知识教育提供科学依据.方法 用社区干预实验,以6种膳食指南营养宣......
