1[1]Ellis,R.The Study of Second Language Acquisition.Oxford:Basil Black well,1994.
2[3]Farhady,H.Measures of Language Proficiency from the Learner's Perspective.TESOL Quarterly:1982.(16):43-59.
3[4]Eisenstein,M.A Study of Social Variation in Adult Second Language Acquisition.Language Learning,1982,(32).
4[5]Wary,A.,K.Trott & others.Projects in Linguistics:A Practical Guide to Researching Language.Beijing:Foreign Language Teaching and Research Press,2001.
3[5]Allwright D.Observation in the Languange Classroom[M].London:Longman,1988.
4[11]Elisabeth Hayes.Students' perceptions of women and men as learners in higher education [J].Research in Higher Education ,1992,33 (3).
5[13]程晓堂,郑敏.英语学习策略[M].北京:外语教学与研究出版社,2000.
6[1]Krashen S D.The Input Hypothesis:Issues and Implications[M].London:Longman,1985.
7[2]Pica T,L Halliday,N Lewis,L Morgenthaler.1989.Comprehensible output as an outcome of linguistic demand on the learner[J].Studies in Second Language Acquisition,1989,(11).
8[3]Ellis Rod.The Study of Second Language Acquisition[M].Oxford:Oxford University Press,1994.
9[4]Chaudron C.Second Language Classroom:Research on Teaching and Learning [M].Cambridge:CUP,1988.