6Holec H. Autonomy and Foreign Language Learning [ M ].Oxford : Pergamon, 1981.
7Warschauer M & Kern R. Network-based Language Teaching: Concepts and Practice [ M ]. Cambridge : Cambridge University Press ,2000.
8Firth, A. & J. Wagner. On discourse, communication, and (some) fundamental concepts in SLA research[ J ]. Modern Language Journal, 1997,81:285 -300.
9Gottwald, S. Websites for second language research [ J ].Second Language Research,2002,18:83 - 94.
10Hauser, Marc D. , Noam Chomsky & W. Tecumseh Fitch.The faculty of language: what is it, who has it, and how did it evolve [ J ]. Science,2002,298 : 1569 - 1579.
