某二叉树的前序遍历序列与中序遍历序列相同，均为ABCDEF，则后序遍历序列为（ ）

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SQL Error: select id,body,options from ***_enewstiku where sourceid='29842' and id < 2421930 and id<>'2421930' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='29842' and id > 2421930 and id<>'2421930' order by id asc limit 5