2Sample,M. Twitter is a SnarkValve [EB/OL]. <http://ww .samplereality.com/2009/10/07/twitter-is-a-mark-valve.>.
3Mork, C. M. Using Twitter in EFL Education [J].The JALT CALL Journal,2009,(3):41-56.
4Walsh,K.100 Ways to Teach with Twitter [EB/OL]. <http://www.emergingedtech.com/2010/02/100-ways-to-teach -with-twitter.>.
5Walsh,K.4 Great Twitter Applications for Teachers Using Twitter In The Classroom [EB/OL]. <http://www.emergingedtech.com/2011/10/4-great-twitter-ap plications-for-teachers-using-twitter-in-the-classroom.>.
9Hug,Theo.Micro Learning and Narration.Exploring possibilities of utilization of narrations and storytelling for the designing of"micro units"and didactical micro-learning arrangements[].the fourth Media in Transition conference.2005
10Java,A,Song,X,Finin,T,Tseng,B.Why we twitter:Understanding microblogging usage and communities[].Procedings of the Jointth WEBKDD andst SNA-KDD Workshop.2007
3Callis AN,McCann A1,Schneiderman ED,et al .Appli- cation of basic science to clinical problems:traditional vs.hybrid problem-based learning[J]. J Dent Educ, 2010, 74(10):1113-1124.
4Lee MK, Allareddy V, Howell TH ,et al. Association Be- tween National Board Dental Examination part II Scores and Comprehensive Examinations at Harvard School of Dental Medicine[J].J Dent Educ,2011,75(1).90-97.
5Allareddy V,Havens AM,Howell TH,et al.Evaluation of a New Assessment Tool in Problem-Based Learning Tutorials in Dental Education[J]. J Dent Educ,2011,75 (5) :665-671.
6Tian JH, Yang KH, Liu AY.Problem-based learning in evidence-based medicine courses at Lanzhou University [J]. Med Teach, 2012,34(4): 341.
