一、引言20多年来的改革和发展证明,对外开放使得我国充分利用国内国外两个市场、两种资源,极大地促进了我国生产力的发展,提高了人民的生活水平,居民的人均收入水平有了很大的提高。城镇居 I. Introduction Since the reform and development in the past 20 years, the opening up to the outside world has enabled our country to make full use of the domestic and foreign markets and resources to promote the development of our productive forces and raise people’s living standard. The per capita income level of residents Great improvement. Town home