共 16 条
[1]
Brown J. D., 1988, UNDERSTANDING RES 2
[3]
Faghih E, 2009, RICE WORKING PAPERS, V1, P92
[4]
Falahati R., 2006, PAP 22 NW LING C
[5]
Farrokhi F., 2008, J APPL LINGUISTICS, V1, P62
[7]
Holmes J, 1982, EXPRESSING DOUBT CER, V13, P19
[8]
Hyland, 1994, ENGL SPECIF PURP, V3, P239, DOI DOI 10.1016/0889-4906(94)90004-3