Citiesusuallyhaveagoodreasonforbeingwheretheyare,lik...
问题详情： Citiesusuallyhaveagoodreasonforbeingwheretheyare,likeanearbyportorriver.Peoplesettleintheseplacesbecausetheyareeasytogettoandnaturallysuitedtocommunicationsandtrade.NewYorkCity,forexampl...