2-3树是一种特殊的树 它满足两个条件: (1)每个内部结点有两个或三个子结点; (2)所有的叶结点到根
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2-3树是一种特殊的树,它满足两个条件: (1)每个内部结点有两个或三个子结点; (2)所有的叶结点到根的路径长度相同; 如果一棵2-3树有9个叶结点,那么它可能有_________个非叶结点。 (多项) 2-3 tree is a special kind of tree, it satisfy: (1)Every internal node has 2 or 3 child nodes. (2)All the leaf nodes have the same length of the path to the root node. If a 2-3 tree has 9 leaf nodes, then it may have __________ non-leaf nodes.(There are more than one correct answers)
A.4
B.5
C.6
D.7

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8;7
