2. 计算机
  3. Rapid advances in computer and communication technologies have resulted in the(71) merger of these two fields. The lines have bl

Rapid advances in computer and communication technologies have resulted in the(71) merger of these two fields. The lines have bl

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问题 Rapid advances in computer and communication technologies have resulted in the(71) merger of these two fields. The lines have bluned among computing, switching, and digital transmission equipment, and the same digital techniques are being used for data, voice, and image transmission. Merging and evolving technologies, coupled with increasing demands for efficient and timely collection, processing, and(72) of information, are leading to the development of(73) that transmit and process all types of data. The ultimate goal of this evolution is something its proponents-some of the most powerful forces in the computing and telecommunications industries-call the (74) .The (74) will be a worldwide public telecommunications network that will deliver a wide variety of services. The (74) will be defined by the standardization of user interfaces, and will be implemented as a set of digital switches and paths supporting a broad range of traffic types and providing (75) processing services. Inpractice, there will be multiple networks, implemented within national boundaries, but from the user’s point of view there will be a single, uniformly accessible worldwide network.
选项 A、accessible
B、special
C、data
D、value-added
答案D
解析 计算机与通信技术的飞速发展已经导致了这两个领域的不断融合。在这条线路中已经跌跌撞撞地走过了网络计算，交换机和数字通信设备。和那类似的数字技术一直被用在数据，语音和图象传输方面。加上不断增长的对高效率与及时性要求的处理能力和分布信息导致了集成信息的发展来实现传输和处理各种类型的信息。那发展的最终目的是一个具有非常强的在计算与通行方面的能力，在工业界称它为ISDN，它将被广泛的应用在各种服务行业。同时也被定义为标准的用户接口。它被应用在一系列的数字交换和通路上，以使支持更宽的交易种类和提供增值的处理服务。实际上，它将会成为一个复杂的网络，在国家范围内执行。但是对用户来说，它将是个单一的，统一的可访问全球网络。
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