Citiesdonotappearontheearthrandomly,nordotheygrowinaran...
问题详情:Citiesdonotappearontheearthrandomly,nordotheygrowinarandomfashion.Theydevelopastheresultofacomplexinterplayofenvironmentalandsocialfactors.Severalfactorsinthenaturalenvironmentdeterminetheloca...