2. 职称英语
  3. A postman delivers mail round a housing estate. He does not want to visit the sa

A postman delivers mail round a housing estate. He does not want to visit the sa

游客2024-08-19  3
问题 A postman delivers mail round a housing estate. He does not want to visit the same street more than once, but can pass over the same street comers. On which housing estate is this possible?
选项 A、 
B、 
C、 
D、 
答案 D
解析
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