©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(,100732):,,,,,,,,,:;;;;;:D820;D822:A:1007-5194(2010)03-0075-06:2010-04-25:,,200911,,,:,;,;;;2010315,130,27.5%,,:,,?,,,,,,,,,[1],,,,,,,,57©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[2](P46-47),,,,:,;,;,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,[3],,,,,,,,,67©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.:,,,[2]P158),,,,,,,,,,,;,,,;,,,,,,,,,,,,,,,,,,,,,2002,,,,,,,,,,,,,77©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.©1994-2010ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.[4],,,,,,,,,,,,,,,,,,,,,,,,,,:[1].[M]..:,1979:47-48,249.[2].1999:[M].,.:,1989.[3]:29[M].:,1957:474.[4][N].,2010-03-17.:08