中文摘要：

基于社区的在线问答平台（CQA）在大学生课堂内外的学习和实践中扮演着越来越重要的角色，但是不断扩大的城乡贫富差距使城市大学生和农村大学生已经异化为不同的群体，而这些群体对于CQA的态度和接受度是否存在差异还缺少相应的研究。已有一些调查文献证明CQA系统对大学生自身成长具有积极的效应。这种效应在城乡大学生之间是否存在差异？农村学生对于CQA平台的态度和认知与城市学生相比有哪些不同？一项基于技术接受模型和自我决定理论的问卷对此进行了调查。在偏最小二乘的结构方程模型的数据分析下发现：相比于城市学生，农村学生从CQA的改进中所获得的收益较少；而相比于有用性，CQA在易用性方面的改进对学生的能力成长有着更为显著地效果，尽管目前系统在易用性上的表现还差强人意。

英文摘要：

The online community question -answering （CQA） platform plays a more and more important role in undergraduates＇ learning and practice inside and outside the classroom. However, the rising gap between urban and rural areas in China causes different attitudes toward CQA between urban and rural students, and also results in different effects in promoting their growth of abilities. What effect does the CQA have on the progress of college students？ What are the differences between rural students＇ attitude and cognition toward CQA and those of their ur- ban counterparts？ Based on the revised Technology Accepted Model （TAM2） and self- determination theory （SDT）, a survey is conducted in this respect. PLS- SEM （Partial Least Squares Structure Equation Model） and descriptive statistics were applied to analyze the data for demonstration. The results indicate that the rural students get less benefit from the improvement of CQA than the urban students do. In addition, the improvement of the perceived usability can more significantly promote students＇ progress, although the usability of the present system is barely satisfactory.