随着电子技术的不断发展和进步，广播、电视、有线电视等一大批大众信息传播媒界也在不断地发展和完善之中。特别是以计算机为代表的数字数据化的信息交换方式，使得信息交换的速度更加迅速，共享程度更高，产生了一大批像电子邮政、信息查询等更高层次的应用，也产生了一... With the continuous development and progress of electronic technology, a large number of mass media, such as radio, television and cable television, are constantly being developed and perfected. In particular, digital data-based information exchange methods represented by computers make the exchange of information faster and more shared, resulting in a large number of higher-level applications such as electronic postal services and information inquiry. ..