英语六级阅读理解专练题带答案.docx

英语六级阅读理解专练题带答案Inthelasttwohundredyearstherehavebeengreatchangesinthemethodofproductionofgoods.Thisisnowalsotrueofthebuildingindustry;formechanizationhasbeenintroduced.Systembuildingcansavebothtimeandmoney.Theprincipleofsystembuildingisthatthebuildingismadefromasetofstandardunits.Theseareeithermadeatthebuilding-siteoratafactory.Somedesigners,infact,arestandardizingthedimensionsofrooms.Theyaremadeinmultiplesofasinglefixedlength,usuallytencentimeters.Thisiscalledamodular(标准件的)system,anditmeansthatmanufacturescanproducestandardizedfittingsatalowercost.Themostimportantfactaboutsystembuildingisitsspeed.Aten-storeyflat,forexample,canbecompletedinfourmonths.Thereareseveralnewmethodsofsystembuilding.Oneisthepanelmethod.Inthiscase,theconstructioncompanysometimeserectsafactoryonthesite.Thewallsandfloorsofthebuilding,calledpanels,arecastinahorizontalorverticalposition.Conduitsforelectricalwiresandsleevesforpipesarecastinthepanelswhentheyarebeingmade.Themouldsformakingthesecastingsaresituatedallaroundthebuilding.Aftertheconcretepanelsarecast,theyareallowedtosetandhardenforaweek.Nexttheyareliftedbyatowercraneontoanysectionofthebuilding.Therethepanelsarecementedtogetherattheirjointsandthefloorcoveringislaid.Afterthepanelshavebeencementedtogether,thecraneliftsacaseintothearea.Itcontainsallthefittingstobeinstalled,suchaswash-basins,radiatorsandpipes.Finishingtradesmen,suchasplumbers,plasterers,paintersandelectricians,followbehindtocompletethework.Insomebuildingdevelopments,insomecountries,wholeflatswithinternalfeaturesliketheirbathrooms,bedroomsandconnectingstairs,andweighingasmuchastwentytons,arecarriedtothebuilding-siteready-made.Agiantoverheadcraneisusedtoliftthemintoposition.Inthefuture,thismethodmaybecomemorewidespread.1.Themaindifferencebetweenpanelmethodandthemethoddiscussedinthelastparagraphis_______.A.thelatterusesready-madeinternalfeaturesB.panelsarecastinalevelpositionC.theformerisusedtobuildwallsandfloorswhilethelattertoconstructbathroomsorbedroomsD.theformerismoreexpens