1Dmyei,Z.Teaching and Research Motivation[M].Beijing: Foreign Language Teaching and Research Press, 2005.
2Oxford, R. & Shearin, J. Language learning motivation:ex-panding the theoretical framework [J].The Modern Lan- guage Journal, 1994( 1 ).
3Gardner, R. C. Social Psychology and Second Language Learning: the role of attitudes and motivation [ M ].London : Edward Arnold, 1985.
4Ryan, R. M. & Deci, E. L. Intrinsic and extrinsic motiva- tions:classic definitions and new directions [J].Contempo- rary Educational Psychology, 2000.