某二叉树的先序遍历序列为cab fed g，中序遍历序列为abcdefg,则该二叉树是（）。

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SQL Error: select id,body,options from ***_enewstiku where sourceid='30194' and id < 2442035 and id<>'2442035' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku where sourceid='30194' and id > 2442035 and id<>'2442035' order by id asc limit 5