Passage32<br/><spanstyle="display:block;text-align:center;">IndependentInformationandAnalysisfromtheUSA</span>TheGapBetweenRichandPoorWidenedinU.S.CapitalWashingtonD.C.ranksfirstamongthe40citieswiththewidestgapbetweenthepoorandtherich,accordingtoarecentreportreleasedbytheD.C.FiscalPolicyInstituteonJuly22nd.Thetop20percentofhouseholdsinD.C.haveanaverageyearlyincomeof$186,830,31timesthatofthebottom20percent,whichearnsonly$6,126peryear.TheincomegapisalsobiginAtlantaandMiami,butthedifferenceisnotaspronounced.<br/>Thereportalsoindicatesthatthewideninggapoccurredmainlyduringthe1990s.Overthelastdecade,theaverageincomeofthetop20percentofhouseholdshasgrown36percent,whiletheaverageincomeofthebottom20percenthasonlyrisen3percent<br/>“Ibelievetheconcentrationofthemiddle-tohigh-incomefamiliesintheD.C.areawillcontinue,therefore,theincomegapbetweenrichandpoorwillbehardtobridge,”DavidGarrisontoldtheWashingtonObserver.GarrisonisaseniorresearcherwiththeBrookingsInstitution,specializinginthestudyofthesocialandeconomicpoliciesinthegreaterWashingtonD.C.area.<br/>ThereportattributedthepersistentincomegapinWashingtontothearea’sspecialjobopportunities,whichattracthigh-incomehouseholds.EspeciallysincethefederalgovernmentisbasedinWashingtonD.C.,Governmentagenciesandothergovernmentrelatedbusinessessuchaslobbyingfirmsandgovernmentcontractorsconstantlyofferhigh-payingjobs,whichcontributetothetrendofincreasinghigh-incomehouseholdsintheD.C.area.Forexample,asingleyoungprofessionalworkinginalawfirminD.C.canearnasmuchas$100,000inhisorherfirstyearoutoflawschool.“Inaddition,high-qualityhousingavailableinWashingtonD.C.isoneofthemainreasonswhyhigh-incomefamilieschoosetolivehere,whilemiddleandlow-incomefamilies,iftheycanaffordit,choosetomoveoutofWashingtonD.C.totheVirginiaandMarylandsuburbssothattheirkidscangotobetterschools,”statedGarrison.<br/>“AsrichfamiliescontinuetomoveintoD.C.andmiddleandlow-incomefamiliesaremovingout,thepoorestfamiliesareleftwithnowheretomove,orcannotaffordtomove.Thiscreatesthesituationwefacenow:ahugeincomegapbetweentherichandpoor.”<br/>TheWashingtonD.C.areatowhichGarrisonrefersistheDistrictofColumbiacityitself,notincludingthegreaterWashingtonmetroarea.“ThegreaterWashingtonmetroareahasalargepopulationofabout5million,butthelow-incomehouseholdsareoftenconcentratedinD.C.proper,”Garrisonexplained.<br/>TonyBlalock,thespokespersonforMayorAnthonyWilliams,saidresignedly,“NomatterwhatweseemtodotobringinvestmentintotheDistrict,acertainpopulationisnotabletoaccesstheuniqueemploymentopportunitiesthere.Thegapbetweentherichandpooristheproductofcomplexforces,andwon’tbefixedovernight.”<br/>GarrisonbelievesthattheD.C.governmentshouldattracthigh-incomefamilies.Bydoingso,theDistrict’staxbasecangrow,whichinturncanhelpimproveD.C.’sinfrastructure.“Butinthemeantime,theDistrictgovernmentshouldalsotakeintoconsiderationtherightsofthepoor,setupgoodschoolsforthem,andprovidesoundsocialwelfare.Allthesemeasurescanalleviatethediresituationcausedbyincomedisparity.“<br/>Garrison,however,isnotoptimisticaboutthepossibilityofclosingthegapbetweentherichandpoor.Heisparticularlydoubtfulthatcurrenteconomicprogresswillbeabletohelpoutthepoor.“Bush’stax-cutplandidbringaboutthiswaveofeconomicrecovery,andtheworkingprofessionalsandrichdidbenefitfromit.Itisunfairtosaythattheplandidnothelpthepooratall…itjustdidn’tbenefitthemasmuchasitdidtherich,”Garrisonsaid.“TheworkingclassinAmerica,thosewhodothesimplestwork,getpaidtheleast,anddutifullypaytheirtaxes,hasnotbenefitedfromBush’stax-cutplanmuch.”<br/>Garrisonconcludes,“AlotofcitiesinAmericadidnotenjoythepositiveimpactoftheeconomicrecovery.WashingtonD.C.,ontheotherhand,hasalwaysbeenshelteredbythefederalgovernment.ThewidegapbetweenrichandpoorintheDistrict,therefore,deservesmorein-depthstudyandexploration.”

比较C≡C, C=C, C─C, C=C─C=C的键长次序为: C=C─C=C>C─C> C≡C >C=C|C=C─C=C>C─C>C=C>C≡C|C≡C>C=C>C─C>C=C─C=C|C─C>C=C>C=C─C=C>C≡C|C─C>C=C─C=C>C=C>C≡C

下列哪种主链骨架原子排列最能代表两个肽键?() A: Cα—N—Cα—C—Cα—N—Cα—C B: Cα—N—C—C—N—Cα C: C—N—Cα—Cα—C—N D: Cα—C—N—Cα—C—N E: Cα—Cα—C—N—Cα—Cα—C

比较C≡C(Ⅰ),C=C(Ⅱ),C─C(Ⅲ),C=C─C=C(Ⅳ)的键长次序为( )。 A: Ⅰ＞Ⅱ＞Ⅲ＞Ⅳ B: Ⅲ＞Ⅱ＞Ⅳ＞Ⅰ C: Ⅲ＞Ⅳ＞Ⅱ＞Ⅰ D: Ⅳ＞Ⅲ＞Ⅱ＞Ⅰ

不稳定的一类化合物是: C≡C|C－C|C＝C|C＝C－C＝C|C＝C＝C

NaNH4HPO4水溶液的质子条件式为 A: c(H+)+c(H2PO4-)+2 c(H3PO4)=c(OH-)+c(NH3) +c(PO43-) B: c(H+)+c(H2PO4-)+ c(H3PO4)=c(OH-)+c(NH3) +c(PO43-) C: c(H+)+c(NH3)+ c(H3PO4)=c(OH-)+c(PO43-) +c(H2PO4-) D: c(H+)+c(NH3)+ 2c(H3PO4)=c(OH-)+c(PO43-) +c(H2PO4-)

比较C≡C(I)，C=C(II)，C─C(III)，C=C─C=C(IV)的键长次序为：

在同一种固体介质中，纵波、横波、表面波三者之间的声速关系为（） A: C﹤C﹤C B: C﹤C﹤C C: C﹤C﹤C D: C﹤C﹤C

scanf(“%c%c%c“, &a,&b,&c)与scanf(“%c %c %c“ ,&a,&b,&c)的输入（ ）。

能产生共轭效应的是 A: C=C=C B: C=C C: C≡C D: C=C-C=C E: C-C