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【单选题】
考虑下面的属性文法G(S):产 生 式语 义 规 则S ® ABCprint A.num, B.num, C.num A ® 【图片】 aA.num = 【图片】.num + 1A ® εA.num = 0B ®【图片】bB.num = 【图片】.num + 1B ® εB.num = 0C ®【图片】 cC.num = 【图片】.num + 1C ® εC.num = 0对于输入字符串aabbbc进行语法分析和属性计算,输出结果是
A.
1    2    3
B.
3    2    1
C.
2    3    1
D.
2    1    3
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