机体自身可以合成的维生素是

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30438' and id < 2459342 and id<>'2459342' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30438' and id > 2459342 and id<>'2459342' order by id asc limit 5