7[2]Holec H.Autonomy and Foreign Language Learning[M].Oxford:Pergamon Press,1981.
8[3]O'Malley,J M & Chamot A U.Learning Strategies in Second Language Acquisition[M].Cambridge University Press,1990.
9[1]Kein,R & M.Warschauer.Introduction:Theory and practice of network-based language teaching[A].In M.Warschauer & R.Kein (eds).Network-based Language Teaching Concepts and Practice[C].Cambridge:Cambridge University Press,2000.
10Cohen, A. D. Strategies in Learning and Using a Second Language [M] .London: Longman, 1998.