©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.