众所周知,21世纪人类将迎来一个令人耳目一新的知识经济时代,这一时代的主要特征是信息化、全球化。知识的超速积累,不但为人类创造了大量的物质文明,同时也促使人们的观念和思维方式发生着根本的改变。科学技术的发达,交通、通讯的便捷,互联网的应用和世界经济的一体化使公共 As we all know, in the 21st century, mankind will usher in a refreshing era of knowledge economy. The main features of this era are informatization and globalization. The accelerating accumulation of knowledge has not only created a large number of material civilizations for humans, but has also caused fundamental changes in people’s ideas and ways of thinking. The development of science and technology, the convenience of transportation and communication, the application of the Internet and the integration of the world economy make public