宁夏回族自治区改水降氟工作进展钟宁祥，吴敬祝，何业新，张福贵一、基本情况宁夏回族自治区地处中国西北部，位于黄河上游．东邻陕西省，北部与内蒙古相接，酉部与甘肃省相连，全区总面积６．６４万平方公里，人口５００万，是一个以回族为主体。汉族占多数，由３１个民... Progress of Ningxia Hui Autonomous Region to water and fluoride reduction Zhong Ningxiang, Wu Jingzhu, He Yexin, Zhang Fugui First, the basic situation Ningxia Hui Autonomous Region is located in northwestern China, located in the upper reaches of the Yellow River. It is adjacent to Shaanxi Province to the east, to the north to Inner Mongolia, to the west to the Gansu Province. With a total area of ​​66,400 square kilometers and a population of 5 million, the area is mainly composed of Hui people. Han majority, from 31 people ...