Deep Web; Network information resource; information retrieval; U. S. a.
深网；网络信息资源；信息检索；美国。
As an important part of Web-based teaching, the retrieval of teaching information has become main way by which learners get knowledge resource.
教学信息检索作为网络教学的重要部分，已经成为学习者获取知识资源的主要途经。
As an important part of Web-based teaching, the retrieval of teaching information has become main way by which learners get knowledge resource.
教学信息检索作为网络教学的重要部分，已经成为学习者获取知识资源的主要途经。
应用推荐