©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(2009)12-0097-05,,,,,;;TU201A(1972),,,,,,2009-05-192009-09-16,,,,,,,,,,,:,,,,,,,,,,79173200912©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:,,,,,,,,,,,,,2.,,YVT,,,,;V,,,,;Y,,,,,;,,,,,,,,,:;;;;1.,,,20077040:,;;,,:,,,,,89200912©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(1);,,,,,(2)12.,,,;,;,,,,,,,(3),,,,,(4),,(5),,,,,99200912©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(6)4.,,6,,,,,,,;,,,,;,,,,,,;,(7)5.,,,,;,,,,,;,,001200912©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[1].[M].,2004[2],.21[M].,2005[3].[M].,2004[4].()[M].,2005[5]..[M],2004[6]...,,.21.,2005[7],..,2005[8].[J].,2005(12):103[9].390680[J].,2007(7):16[10]..,2005(2):26(:;:)101200912