1Anderson, W. T. Jr, Cox, E. P. and Fulcher, D. G. Bank Se- lection Decisions and Market Segmentation [ J ]. Journal of Marketing, 1976( 1 ) : 40 - 45.
2[美]迈克尔·皮特.竞争优势[M].陈丽,译.北京:中信出版社,2014:187-218.
3Hendrik Hakenes. Banks Allen and Santomero Delegated Risk ManAllen and Galeers [ J ]. Working Paper from University of Mannheim,2003 (3) : 171 - 180.
2Crabbe,D.The quality of language learning opportunities.TESOL Quarterly, 2003.
3Gass,S.Input Interaction and the Second Language Learner.Mahwah,NJ.:Lawrence Erlbanm, 1997.
4Swain, M.Three functions of output in second language learning.In G.Cook and B. Seidlhofer (eds.).Principle and Practice in Applied Linguistics:Studies in Honour of H.G.Widdowson. Oxford: Oxford University Press, 1995.