【摘 要】
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目的调查分析衡阳市本地主体建材(红砖、沙子、鹅卵石)中放射性核素40K、226Ra、232Th的含量水平。方法采集衡阳市本地主体建材,按照国家标准进行样品制作,并利用BH 1936低本
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目的了解广州市戊型病毒性肝炎(简称戊肝)发病情况及流行趋势,确定高危人群,为戊肝的预防控制提供数据支持。方法对广州市2005-2013年戊肝发病数据进行描述流行病学分析。结
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