5Coffey, B. State of the Art Article-ESP: English for Specific Purposes[J]. Language Teaching, 1984(2) :81 -83.
6Cummins, J. Cognitive/Academic Language Proficiency, Linguistic Interdependence, the Optimum Age Question and Some Other Matters [ R ]. Working Papers on Bilin- gualism, 1979(19) :121 - 129.
7Dudley-Evans, T. & M. St. John, Developments in ESP: A Multi-isciplinary Approach. Cambridge [ M ]. Cambridge University Press, 1998.
8Halliday, M. A. K. , Mclntosh, A & P. Strevens. The Linguistics Science and Language teaching [ M ]. London: Longman, 1964.
9Hutchinson, T. & Waters, A. English for Specific Purpo- ses : A Learning-centered Approach [ M ]. Cambridge : Cam- bridge University Press, 1987.
10Jordan, R.R. English for Academic Purposes : A Guide and Resource Book for Teachers [ M ]. Cambridge University Press, 1997.
