3819992,,,,,,,,,()():,;,,,,,,,,,:1.,,;2.,,;3./;4.,,;5.:()288G,,,,()G,,:(),,;:,,,;,,,,,400,,,,90,,,300,,3,(),,:1.,;2.,(57)©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(38);;3.,;4.,;5.:19956,B()50,B,,10,,,,,,,,(),,,,,,,,,,,:,()(),1-5,,,,,;,,,,,,,,,,,;,,,,,,,,(),,(),,,,,,,(),,,,,,,,,,,,::,,19974:,,19971:,,199822:,,:WTO,,19975:,,1995529,1997.2.20/10.30/12.25/1998.2.19/4.2/()©1994-2008ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.