1　前言2 1世纪是人们步入信息化的时代。电子货币、电子商务已渗入我们的生活 ,社会管理已引入电子政府、数字地球的概念。按照国家信息化战略的总体要求 ,要以全社会的信息和知识资源的开发利用为核心 ,以信息技术和信息产业为基础 ,以信息网络为平台 ,以信息应用为主体 ,以? 1 Preface 2 The first century is an era in which people enter the information age. Electronic money, e-commerce has infiltrated our lives, social management has been introduced to the concept of e-government, digital earth. According to the overall requirements of the national informatization strategy, we should take the development and utilization of information and knowledge resources of the whole society as the core, information technology and information industry as the foundation, information network as the platform, information application as the main body,