Traversing a binary tree in preorder is equivalent to
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.
【正确答案】
A
【答案解析】
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