2Allen, J Teaching the c P. B. & Widdowson, H. G use of English [A].In Brumfit, C.J.& Johnson, K., The communicative Approach to Language Teaching [C].Oxford University Press, 1979.
3Strevens, P. ESP after twenty years: A re-appraisal [A].In M.Tickoo (ed.).ESP: State of the Art [C].SEAMEO Regional Language Centre, 1988.
4Cater, D.Some propositions about ESP [J].The ESP Journal, 1983, (2).
5Robinson,P. ESP:The Present Position [M] .Oxford: Pergamon Press, 1980.
6Hutchinson,T. & Waters, A. English for Special Purposes [M].New York:Cambridge University Press, 1987.
7Burnett, R. E.Technical Communication [M].Belmont, CA:Wadsworth PubliShing Campany, 1997.
8Hutchinson, T. &. Waters, A. How communicative is ESP[J]. ELT Journal, 1984, (38).
