This paper first reviews the transformation of the digital reference counseling service and analyzes its main features.

本文回顾了数字参考咨询服务的产生演变，分析了其主要特点。

youdao

This paper first reviews the transformation of the digital reference counseling service and analyzes its main features.

本文回顾了数字参考咨询服务的产生演变，分析了其主要特点。

youdao