用最高级的句型写一篇介绍兰州的英语作文

Lanzhou is the capital of Gansu Province is located in the geometric center of China's Land territory, urban north and south mountains from east to west over the Yellow River traverses the city, with ribbon basin character of the city, is located in the upper reaches of the Yellow River, is a temperate continental climate in winter and no cold , summer without heat, four seasons, suitable for Habitat. Average annual precipitation is 360mm, annual average temperature 9.3 ℃, annual average 2446 hours sunshine hours, frost-free period for more than 180 days. City tree: pagoda tree; flower: Rose.