Based on network distance, GCA and GCAD, a MGCM of DGDN were designed.
基于网络距离机制、GCA和GCAD，设计了DGDN上的多级分组通信模型。
In the network distance education, the high or low of learners' motivation is the key factor to success of the network distance education.
在网络远程教育中，学习者学习动机的高低是教育成功的关键因素。
Basing on that, the article analyses the advantage of cooperation learning and the change of teacher-student role in network distance teaching.
在此基础上分析了网络远程教育环境下开展协同学习的优势以及协同学习中师生角色的转变。
Basing on that, the article analyses the advantage of cooperation learning and the change of teacher-student role in network distance teaching.
在此基础上分析了网络远程教育环境下开展协同学习的优势以及协同学习中师生角色的转变。
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