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近年来，Internet在全球范围内出现爆炸性增长。Internet在极大提高全社会运作效率的同时，自身也在使用成本、可用性和易操作性等方面不断进步。随着互联网信息的爆炸性增长，人们对信息的需求有了越来越高的要求。在信息获取的手段上，电话、传真、计算机和PDA等各种多媒体信
In recent years, the Internet has exploded globally. The Internet has greatly improved the efficiency of the whole society and at the same time has made continuous improvements in terms of cost, usability and ease of use. With the explosive growth of Internet information, people’s demand for information has become increasingly demanding. Means of access to information, telephone, fax, computer and PDA and other multimedia information