【正文】
Learning[M].Cambridge: CUP[9] Neugeld, G. 1978. Atheoretical perspective the nature of linguistic aptitude[J]. InternationalReview of Applied Linguistics, (5): 1526[10]Penfield, W. 1964. The Unmitted cortex: The Child’s Changing Brain [J]. Altantic Monthly, (214): 77 81.[11]Penfield amp。 Roberts. 1959. Speech and Brain Mechanism[M]. New Jersey: Princeton University Press [12]Birdsong, D. 1992. Ultimate attainment in second language acquisition[J]. Language,(68)[13]Rod Ellis, 1986. Understanding Second Language Acquisition[M]. Oxford: Oxford University Press[14]Singleton, D. 1989. Language Acquisition: The Age Factor[M]. Clevedon: Multilingual Matters [15]戴煒棟,[J].外國語(4):110[16]龔少英,[J].心理科學(xué)(3):711714[17][M].上海:上海外語教育出版社[18].“外語要從小學(xué)起”質(zhì)疑[J].外語教育與研究(4):5457[19][J].當(dāng)代語言學(xué)(2):185 [20][J].外語教學(xué)資料通訊(4):13[21]李 [M].濟(jì)南:山東大學(xué)出版社[22]. 應(yīng)用心理語言學(xué)[M].長沙:湖南教育出版社[23]王立非,李 ——兼評(píng)第二語言習(xí)得與鍵期假設(shè)[J].外國語(2):8791[24][J].外語學(xué)刊(5):3139 [25][J].華東師范大學(xué)學(xué)報(bào)(4):5561學(xué)習(xí)參考AcknowledgementI would like to take this opportunity to express my heartfelt thanks to those who have contributed, directly and indirectly, to the pletion of this thesis.First and foremost, I would like to show my deepest gratitude to my supervisor, Li Xu, a respectable, responsible and resourceful scholar,who has provided me with valuable guidance in every stage of the writing of thisthesis. Without his enlightening instruction, impressive kindness and patience, Icould not have pleted my thesis. It is due to his constant encouragement and insightful suggestions that I was eventually able to produce this thesis and sail through difficulties. I confronted in writing this paper. What is more, I have been impressed by his critical mode of looking at the problems, both academic and social, which has inspired me a lot. His keen and vigorous academic observation enlightens me not only in this thesis but also in my future study. My special thanks should go to Wang Chuming, whose articles not only acquainted me with theories on linguistics, pragmatics but also awakened me to the lack of linguistic knowledge and insufficiency of linguistic proficiency. I am also grateful to Cao Ning whose course has benefited me a lot in learning the procedure and textual pattern of thesis writing. I also want to extend great appreciation to my fellow classmates and good friends, especially my three lovely roommates, whose continual encouragement gave me energy and courage during those difficult days of writing this thesis. Finally, my heartfelt thanks should be extended to my parents. Without their love and encouragement, I couldn39。t imagine what my fouryear campus life would be like.寧可累死在路上,也不能閑死在家里!寧可去碰壁,也不能面壁。是狼就要練好牙,是羊就要練好腿。什么是奮斗?奮斗就是每天很難,可一年一年卻越來越容易。不奮斗就是每天都很容易,可一年一年越來越難。能干的人,不在情緒上計(jì)較,只在做事上認(rèn)真;無能的人!不在做事上認(rèn)真,只在情緒上計(jì)較。拼一個(gè)春夏秋冬!贏一個(gè)無悔人生!早安!—————獻(xiàn)給所有努力的人.學(xué)習(xí)參考