Citiesdonotappearontheearthrandomly,nordotheygrowinaran...
問題詳情:Citiesdonotappearontheearthrandomly,nordotheygrowinarandomfashion.Theydevelopastheresultofacomplexinterplayofenvironmentalandsocialfactors.Severalfactorsinthenaturalenvironmentdeterminetheloca...