2004721()JournalofGuangxiTeachersEducationUniversity(NaturalScienceEdition)Jul.2004Vol.21,Sup.:100228743(2004)Z20094203,,(,530001):(),,,,.:;;;;:G642:A,,,,,,,,,.,,.1(1),,[1],,,(),.,,,,,.,,,,,.(2),,,,.,,,,,,,.(3),,,,,,,...,,,,,,2(1),,,,,,,:2004203220:(1963-),,,,.©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[2].1),,,:..11,:,11.2).:,:.,,,,,55,31,,,,(2),,,,,,,,,,,,.,.,,,,,,5,,??51,,,.,1.1231518211210(3),,,,,,,,.12,9,,,,,,,.(),2.259,,:©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(4),,,,,,1),:,,,,.,,,,.2),.,110,95,,33,92,,.3).,,,10,.,,,,,,6.3(1).,,,,,,,,,,,,,,.(2).,,,.,,,,,,,,,,,,,,,,[3].(3),.,,124,104.,,,,.,,,,58,29.,,14,5.,,,.:[1].[M].:,2001.[2].[J]..2002.[3].[M].:.2002.[:]69()©1994-2009ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.