6Wu Yiping. Effective Use of Teaching Materials for College Englishthrough Cooperative Model [ J/OL]. Sino-US English Teaching,2006(3 ) : 45-46 [ 2007-02-06 ]. http://www. linguist, org. cn/doc/su200611/su20061111. pdf.
7Kuhl P.A New View of Language Acquisition[J].The Proceedings of the National Academy of Sciences,USA,2000,97 (22):11850-11857.
8Kuhl P,Williams K,Lacerda F,et al.Linguistic Experience Alters Phonetic perception in infants by 6 months of age[J].Science,1992,255(5044):606-608.
9Iverson P,Kuhl P,Akahane-Yamada R,et al.A Perceptual Interference Account of Acquisition Difficulties for Non-Native Phonemes[J].Cognition,2003,87 (1):B47-B57.
10Frieda E M,Walley A C,Flege J E,et al.Adults' Perception of Native and Nonnative Vowels:Implications for the Perceptual Magnet Effect[J].Perception and Psychophysics,1999,61 (3):561-577.