張瓊穗  陳宜欣2014-10-272014-10-272005-02-??http://rportal.lib.ntnu.edu.tw/handle/20.500.12235/22488遠距學習  網路學習  線上教學  需求分析 線上助教Distance learning  Web-based learning  Online teaching  Teaching assistants  Needs assessment大學網路課程線上助教工作職責之探討The Study on the Role & Competences of Online Teaching Assistants in Web-based Learning Courses