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【Thewheelwasoneofman’sfirstinventionsandyetithasalsoprovedoneofthemostuseful.Sowideandvariedaretheusesofthewheels,inmachinesandvehiclesofallkinds,thatitisdifficulttoimaginewhattheworldwouldbelikew】
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Thewheelwasoneofman’sfirstinventionsandyetithasalsoprovedoneofthemostuseful.Sowideandvariedaretheusesofthewheels,inmachinesandvehiclesofallkinds,thatitisdifficulttoimaginewhattheworldwouldbelikewithoutthem.Itissurprisingtohearitsaid,therefore,thatthewheel’simportancewillperhapsbegreatlyreducedbytheendofthecenturybyaninventionsonewastobestillunnamed.

Theinventionisamachinethefloatsaboveanysurfaceonacushionofair.Thecushionisformedwhenairisblownintothissaucer,themachinerisestoaheightthatmayvaryfromafewinchestoafewfeet.

Industryisalreadyusingoneformoftheinversiontodealwithheavyloads.Itcanliftthem.witheaseandsincetherearenowheels,andthereforenofriction,theycanbeputintomotionwiththetouchofafinger.

Thenewinvention,however,ishavingagreateffectontransport,Notonlydoesitmakeexpensiveroadsystemsunnecessary,butitenablesvehiclestotravelwelloverlandorwater.Thisuniquetoreachmostdestinationshasgivenrisetothepredictionthatwheeledvehiclesmaybeuncommonattheendthecenturyasaeroplaneswereatthebeginning.

1.Thefirstparagraphtellsusthat______.

A.thewheelwasman’searliestinvention.

B.thewheel’susefulnesshasyettobeproved.

C.widewheelshaveavarietyofimportantuses.

D.anewinventionmaymakewheelslessimportant.

2.Thephrase“withthetouchofafinger”inthethirdparagraphmeans______.

A.withoutdifficulty B.byelectricity.

C.withoutfriction D.byhand.

3.Thepassagetellsusthatthenewinvention__________.

A.ismoreimportantforindustrythanfortransport.

B.willonedaybeusedinsteadofaeroplanes.

C.makesitpossibletotravelwithoutusingroads.

D.willreplacewheeledvehiclesusingroads.

4.Accordingtothepassage,thenewinvention_______.

A.willsoongetaname &nb

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  小题1:D小题2:A小题3:C小题4:B   略
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《【Thewheelwasoneofman’sfirstinventionsandyetithasalsoprovedoneofthemostuseful.Sowideandvariedaretheusesofthewheels,inmachinesandvehiclesofallkinds,thatitisdifficulttoimaginewhattheworldwouldbelikew】|小学英语问答-字典翻译问答网》
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