维管形成层属于（ ）。（多选）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29830' and id < 2421066 and id<>'2421066' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29830' and id > 2421066 and id<>'2421066' order by id asc limit 5