一、城市的特点:城市是一个非常特别的生态系,在很小的范围内居住着很多人口和他的牲畜,如蛋禽饲养场和奶牛饲养场等。所有的能源,包括食物和动力,都必须从外面运进。工业和生活垃圾废物又必须从城市运出处理。这些巨大的运输量主要依靠水运来完成。因此,城市居民点都座落在沿河、沿海水运交通方便的地方。城市房屋鳞次栉 First, the characteristics of the city: The city is a very special ecosystem, living in a very small area with a large population and his livestock, such as egg and bird farms and dairy farms. All energy, including food and power, must be imported from the outside. Industrial and domestic waste must be removed from the cities. These huge amounts of traffic mainly rely on water transport to complete. Therefore, urban settlements are located along the river, coastal water transport and convenient place. City houses row after row