下图所示的非确定有限自动机 （S0为初态， S3为终态）可识别字符串（ ）。
- A.bbaa
- B.aabb
- C.abab
- D.baba
正确答案及解析
正确答案
解析
输入B选项，从起始S0开始，输入a到S0，输入a到S1，输入b到S2，输入b到S3（终点），因此选项B正确；将其他几个选项带入可以发现，均不能到达终点。
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