- 問題詳情:Howdoyougetacrossariver?Abridgeisthebestway.Insomeplaces,therearenobridges.Peopleusetheferry(渡船).Aferryisaboatthattakespeopleandcarsacrosstheriver.Bothendsofaferrylookthesame.Theferryneverhastoturnaround.Itdocks(靠岸)atonesideoftheriver.Peoplea...
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