题目内容

下列关于二叉树周游的叙述中,哪一条是正确的

A. 若一个结点是某二叉树的对称序最后一个结点,则它必是该二叉树的前序最后一个结点
B. 若一个结点是某二叉树的前序最后一个结点,则它必是该二叉树的对称序最后一个结点
C. 若一个树叶是某二叉树的对称序最后一个结点,则它必是该二叉树的前序最后一个结点
D. 若一个树叶是某二叉树的前序最后一个结点,则它必是该二又树的对称序最后一个结点

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在微型计算机中,通常用主频来描述CPU的 21 ;对计算机磁盘工作影响最小的因素是 22 。 21()

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