Traversing a binary tree in preorder is equivalent to(68).

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问题 Traversing a binary tree in preorder is equivalent to(68).

选项 A、Traversing the forest corresponding to the binary tree in root-first order
B、Traversing the forest corresponding to the binary tree in root-last order
C、Traversing the forest corresponding to the binary tree in breadth-first order
D、None of the above

答案A

解析 前序遍历一个二叉树等价于按从树的根部、右子树、右子树查找顺序查找树。
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