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时间:2020-05-19
《2021版高考英语大一轮复习Unit1Culturalrelics练习新人教版必修2.doc》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、Unit1 CulturalrelicsⅠ.阅读ATheLeaningTowerofPisawasnotleaningwhenitwasbuiltin1173anditwasstraightlikeapole.Itstartedtoshiftdirectionsoonafterconstructionbecauseofthepoorfoundationinadditiontothelooselayerofsubsoil(底土).Atthebeginning,itleanedtothesoutheastbeforetheshakyfoundationstarted
2、toshiftleaningtowardsthesouthwest.Aftertheperiodofstructuralstrengtheninginthebeginningof21stcentury,nowtheLeaningTowerofPisaleansatanangleof3.97degrees.In1178,theshiftindirectionwasobservedforthefirsttimewhentheconstructionhadprogressedfurthertothethirdfloor.Thetowerwasveryheavyfort
3、hethree-meterfoundationthatwasbuiltonaweakareaofland.Forcompensating(补偿)theleaningposition,thebuildersstartedtoconstructtheupperfloorswithonesidehigherthantheotherone.Thiscausedthetowertoleanintheotherdirection.Thisunusualstructureledtothetowerbeingactuallycurved.Inspiteoftheseeffort
4、s,thetowerkeptonleaning.ThegovernmentofItalystartedtoplanapreventionofthecompletecollapseofthetowerin1964.However,arequestwasputforwardbytheauthoritiestokeeptheleaningpositionbecauseofthetourismindustryoftheregion.Afternearlytwodecadesofcarefulplanningbyengineers,historiansandmathema
5、ticians,thestabilizationeffortsfortheLeaningTowerofPisastartedin1990.Thetowerwasclosedforthegeneralpublicandthepeoplelivingnearbymovedaway.Forreducingthetotalweightofthetower,itssevenbells6whichrepresentedthesevenmusicalnoteswereremoved.ThetowerwasreopenedforthegeneralpubliconDecembe
6、r15,2001.InMay2008,afterremovinganother70metrictonsofearth,theengineersannouncedthatthetowerhadbeenfinallystabilizedanditwouldremainstableforatleast200years.1.WhydidtheLeaningTowerofPisabegintolean?A.Itwastoohighlikeapole.B.Itsfoundationwasfarfromstrong.C.Theworkofrepairwasdelayed.D.
7、Itsfoundationshookbadly.2.WhendidpeoplenoticetheLeaningTowerofPisashiftitsdirection?A.Assoonasitwasconstructed.B.Attheendoftheconstruction.C.Soonaftertheconstruction.D.Inthecourseoftheconstruction.3.WhydidtheauthoritiesprefertokeeptheleaningpositionoftheLeaningTowerofPisa?A.Theywante
8、dtoattractmo
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