【摘要】 虚拟咨询服务即图书馆和信息机构在网络环境下为用户提供不受时间空间限制的服务。其主要形式有两种:基于电子邮件和基于实时聊天。本文系统地介绍了这两种形式的虚拟咨询服务。更多还原

【Abstract】 The rapid development of computer and network technology not only leads to an age of digi-talized resources, but also provides digital or virtual reference service for us to locate the resources in cyber space. Virtual reference service is provided to users without being limited by time and space. The major two types of virtual reference are email - based service and chat - based service. In this paper, the two types of service are systematically stated.更多还原