当今社会三大主题:知识经济,全球化、可持续发展。作为最重要的支撑工具——计算机网络,给全球经济与社会发展带来了巨大的机遇。因特网(internet)以其发展和普及的速度令人瞠目,据不完全统计,全球因特网用户已逾亿,而我国的网民人数以超过100%的速度增长。网络潮流激荡着全球的各行各业,商业、零售业、新闻业、金融业、娱乐业、 Three major themes in today’s society: knowledge economy, globalization and sustainable development. As the most important support tool - the computer network has brought tremendous opportunities to the global economic and social development. The internet is impressive at its speed of development and popularity. According to incomplete statistics, there are more than 100 million Internet users worldwide, and the number of Internet users in our country has grown by more than 100%. The trend of the Internet has stirred up all walks of life in the world, business, retail, journalism, finance, entertainment,