7Hutchinson T,Waters A. English for Specific Purpos- es : A Learning-Centered Approach[M]. Cambridge: Cambridge University Press, 1987.
8Munby J. Communicative Syllabus Desgine[M]. Cam- bridge : Cambridge University Press, 1978 : 52.
9Dudley-Evans T,St John M J. Developments in Eng- lish for Specific Purposes: A Multi-Disciplinary Ap- proach[M]. Cambridge: Cambridge University Press, 1998: 37.
