( )是人体内含量最髙的微量元素，是合成血红蛋白的原料。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='27771' and id < 2283355 and id<>'2283355' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='27771' and id > 2283355 and id<>'2283355' order by id asc limit 5