( )是人体必需的微量元素之一，是构成甲状腺激素的重要成分。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='26243' and id < 2196823 and id<>'2196823' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='26243' and id > 2196823 and id<>'2196823' order by id asc limit 5