- 问题详情:Twomenarewalkinginthepark.OneisMr.Brown,aworker,theotherisMr.Black.Mr.Brownisgoingtoachair.Itisnexttotheroad.Mr.Blackisafterhim.Mr.BrownfindsMr.Black.NowMr.Blackbeginstowalkfaster(更快).BecausehewantstogettothechairbeforeMr.Black.NowMr.Blackb...
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