,,,,1,,,,2,(19971),,Z2-38047511M(Nm)Pf(Nömm2)Fx(N)(Lm)31081013516121078613114510131264106107116:780Nm,,211(1)MtM(2)FtFx741997No15©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(3)Pf,PfFrdL103212(2)2(Lm)(Lm)Z138h8H8613613Z2h7h8H7H81616Z3h8H81010Z4h9k9N9H91616Z5h8H81616213,,:Mn=mMtm,33nZ1Z2Z51110011002115611803118621703,,,,;,;,,,,,;,,,,37%,4,,:,1984,,,,;,,;,,,,,,,,,,,841997No15©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.(:199714115)941997No15©1994-2006ChinaAcademicJournalElectronicPublishingHouse.Allrightsreserved.