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表2 土壤及稻米中3种重金属浓度table 2 heavy metal content in soil and rice2.3 稻米食用安全风险判断根据85个样品监测结果,cd在第1组25个稻米样品中有...1 土壤重金属不同风险级别条件下精米超标率fig.1 excess ratio of milled rice content under different risk levels of heavy metals