对于后缀表达式abc-+d*（其中，-、+、*表示二元算术运算减、加、乘），与该后缀式等价的语法树为（ ）。
- A.见图A
- B.见图B
- C.见图C
- D.见图D
正确答案及解析
正确答案
解析
对题中ABCD4个二叉树进行后序遍历，得出结果与该后缀表达式一致的则为与其等价的语法树。答案为B。
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