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2018下半年英语六级考试阅读模拟试题(1)
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-madeinternalfeatures
B.panelsarecastinalevelposition
C.theformerisusedtobuildwallsandfloorswhilethelattertoconstructbathroomsorbedrooms
D.theformerismoreexpensivethanthelatter
2.WhichofthesestatementsisTRUEofsystembuilding?
A.Itemploysmoremen.B.Itisdifficultanddangerous.
C.Itcansavebothtimeandmoney.D.Itmeanslessmechanization.
3.Accordingtothepassage,theprincipleofsystembuildingisthat_______.
A.constructionmethodsaresafer
B.buildingsaremadefromasetofstandardizedunits
C.similarbuildingscanbeproduced
D.allunitsareproducedonthesite
4.Theusualfixedlengthinthemodularsystemis_______.
A.twentycentimetersB.tenmillimeters
C.fiftycentimetersD.tencentimeters
5.Whatliftstheconcretepanelsontothebuilding?
A.Cranes.B.Man-power.
C.Pulleys.D.Hydraulicjacks.
答案
1.A2.C3.B4.D5.A
2018下半年英语六级考试阅读模拟试题(2)
Foraslongashumanshaveraisedcropsasasourceoffoodandotherproducts,insectshavedamagedthem.Between1870and1880,locustsatemillionsofdollars'worthofcropsintheMississippiValley.TodayintheUnitedStatesthecottonbollweevildamagesabout300milliondollars'worthofcropseachyear.Additionalmillionsarelosteachyeartotheappetitesofotherplant-eatinginsects.Someofthesearecornborers,gypsymoths,potatobeetles,andJapanesebeetles.
Inmoderntimes,manypowerfulinsecticides(杀虫剂)havebeenusedinanattempttodestroyinsectsthatdamagecropsandtrees.Somekindsofinsecticides,whencarefullyused,haveworkedwell.Yetthesameinsecticideshavecausedsomeunexpectedproblems.Inonelargearea,aninsecticidewasusedagainstJapanesebeetles,whicheatalmostanykindofflowerorleaf.Shortlyafterward,thenumberofcornborersalmostdoubled.Asintended,theinsecticidehadkilledmanyJapanesebeetles.Butithadkilledmanyoftheinsectenemiesofthecornboreraswell.
Inanothercase,aninsecticidewasusedinLouisianatokillthetroublesomefireant.Theinsecticidedidnotkillmanyfireants.Itdidkillseveralsmallanimals.Italsokilledsomeinsectenemiesofthesugarcaneborer,amuchmoredestructivepestthanthefireants.Asaresult,thenumberofsugarcaneborersincreasedandseverelydamagedthesugarcanecrop.
Tobesurethatoneinsectpestwillnotbetradedforanotherwhenaninsecticideisused,scientistsmustperformcarefulexperimentsanddowideresearch.Theexperimentsandresearchprovideknowledgeofthepossiblehazardsaninsecticidemaybringtoplantandanimalcommunities.Withoutsuchknowledge,wehavefoundthatnaturesometimesrespondstoinsecticidesinunexpectedways.
1.AninsecticidewasusedinLouisianatokillthetroublesome______.
A.cornborerB.Japanesebeetle
B.gypsymothD.fireant
2.Whileitisnotdirectlystated,thearticlesuggeststhat______.
A.insecticidesarenotdangeroustoanysmallanimals
B.insecticidesdonotalwaysaccomplishtheirpurposes
C.insecticidesarenolongerbeingusedtokillinsects
D.insecticidesdonoharmtopeople
3.Onthewhole,thearticletellsabout______.
A.theappetitesofplant-eatinginsectsB.thebestwaytokillbollweevilsC.thedangersinusinginsecticidesD.thebestwaytogrowcrops
4.Whichstatementdoesthisarticleleadyoutobelieve?
A.Allchangesarepredictable.B.Nothingeverchangesinnature.
C.Natureisnotalwayspredictable.D.Naturealwaysservesmanwell.
5.Scientistsperformcarefulexperimentsanddowideresearchbecause______.
A.theymustlearntodestroyalltheinsectsthatweneed
B.theymustbesureoneinsectpestisnottradedforanother
C.researchkeepsthemfrominventingnewinsecticideforthecrops
D.researchhelpsthemfindawaytokillallinsects
答案
1.D2.B3.C4.C5.B