在人类已经进入 2 1世纪的时候 ,以电脑、电视、电信迅速发展并相互融合为特征的多媒体技术正在一步步深入我们的生活。一个以互联网和信息高速公路为主体的“第四媒体”正以惊人的发展速度向着传统的三大媒体 (报纸、广播、电视 )占据的市场挺进。据统计 ,在西方发达国家 ,通? At a time when mankind has entered the 21st century, multimedia technologies characterized by the rapid development and integration of computers, televisions and telecommunications are taking us step by step into our lives. A “fourth media” centered on the Internet and information superhighways is advancing to the market occupied by the traditional three major media (newspapers, radio and television) at an alarming rate. According to statistics, in the western developed countries,