- 问题详情: Citiesusuallyhaveagoodreasonforbeingwheretheyare,likeanearbyportorriver.Peoplesettleintheseplacesbecausetheyareeasytogettoandnaturallysuitedtocommunicationsandtrade.NewYorkCity,forexample,isnearalargeharbouratthemouthoftheHudsonRiver.Ov...
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