题目内容

在一棵非空二叉排序树中，关键字最小的结点的（41）。

A. 左子树一定为空、右子树不一定为空
B. 左子树不一定为空、右子树一定为空
C. 左子树和右子树一定都为空
D. 左子树和右子树一定都不为空

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