文中还介绍了虚拟参考咨询服务的发展趋势。
This paper also introduces the developing trend of virtual reference service.
数字图书馆中虚拟参考咨询服务通常采用三种模式。
Virtual reference service usually adopts three models in digital library.
针对传统虚拟参考咨询系统中的不足，提出了提问向导模块。
This paper introduces enquiry guide to solve the lack of traditional reference services system.
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