Keywords multimedia network teaching; network courseware; didactical resource.[关键词]媒体网络教学; 网络课件; 教学资源.The Computer - Assisted Instruction [ CAI ] has long been proved is an effective didactical means.计算机辅助 教学,作为一种新型的教学手段...
She spent seven days afloat on a raft.她在一只木筏上漂泊了七天。His business is facing difficulties, but it is staying afloat.他的生意遇到一些困难，但还能维持。We kept her afloat for a couple of hours by bailing frantically.我们拼命往外舀水，使它继续漂浮了几个小时。A num...
数字鸿沟指信息获取的不平等.The Digital Divide means inequality on the acquisition of information.一种是狭义的理解, 即仅指信息内容本身.One kind is the understanding of sense, point to information content itself only namely.冗余信息是指信息传递过程中比实际需要多的信息, 它普遍存...