具有潜在毒性，但在低剂量时可能具有生理功能的微量元素为

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30437' and id < 2459275 and id<>'2459275' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30437' and id > 2459275 and id<>'2459275' order by id asc limit 5