6Chomsky, N. Principles and parameters in syntactic theory[A] in N. Hornstein and D. Lighffoot. Expanation in Linguistics: its nature,origin, and use [ C ] London: Longman, 1981.
7Flynn, S. A Parameter - setting Model of L2 Acquisition [M].Dordrecht: Reidel1,1987.
8Bley - Vroman, R. W. The logical problem of Second Language Learning [ A ]. In S. Gass and J. Schatchter (eds). Linguistic Perspectives on Second Language Acquisition [C]. Cambridge: CUP,1989.
9Schachter, J. Second language acquisition and its relationship to Universal Grammar[J]. Applied Linguistics, 1988, (9): 219-235.
10Felix, S. More evidence On competing cognitive systems[J].Second Language Research, 1985, ( 1 ): 47-72.
6Cook V.Second Language Learning and Language Teaching. Journal of Women s Health . 2000
7Flynn S.’The role of the head-initial/head-final parameter in the acquisition of English relative clauses by adult Spanish and Japanese speakers’[].Linguistic Perspectives on Second Language Acquisition.1989
8Thomas M.Universal Grammarand The lnterpretation of Reflexives in A SecondLanguage[].Language.1991
