网上参考咨询是图书馆信息咨询服务在网络环境下的必然产物。

Reference Service is the inevitable trend of Libraries' information service under internet environment.

youdao

网上参考咨询是图书馆信息咨询服务在网络环境下的必然产物。

Reference Service is the inevitable trend of Libraries' information service under internet environment.

youdao