２０世纪是为人类提供了大大改善生活条件的世纪。无疑，各种发展都与经济有关。本世纪发生的一些事件，对世界经济发展产生了巨大影响。按历史顺序从其重要性上挑选出有代表性的三大事件：一、能源发展。能源是经济发展的首要因素，其中最重要的是石油，因此，对石油生产和市 The twentieth century provided mankind with a century of greatly improved living conditions. Undoubtedly, all kinds of development are related to the economy. Some incidents in this century have had a huge impact on the world economic development. According to the historical order from its importance on the selection of a representative of the three major events: First, the development of energy. Energy is the economic development of the primary factor, the most important of which is oil, so the oil production and the city