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第PAGE\*MERGEFORMAT2页共NUMPAGES\*MERGEFORMAT2页 四级考试阅读主旨题解题技巧实战(4) Excusedfromrecyclingbecauseyouliveinahighrisewitharubbishchute(垃圾道)?Youwon’tbeforlong.Miami’sMarkShantzishasmadeitsimpleforthoselivingintallbuildingstousethechuteandcycle,too.InShantzis’Hi-RiseRecyclingsystem,achuteleadstoapip-shapedcontainerwithsixboxesthatcanturnaroundwhenoperated.Thesystem,whichfitsinthesamespaceasthechuteandcontainernowinuse,enables,glass,plastics,paper,metal,andotherrubbishtogointoseparateboxes.Thesystemiscontrolledfromaboardfoxednexttothechutedoor.Theboardhasabuttonforeachclassofrecyclingmaterials.Atthepressofabutton,amicrocomputerlocksallotherfloors’chutedoorsandsetstherecyclingcontainerturninguntiltherightboxcomesunderthechute.Thecomputeralsocountstheloadsandgivesasignalbyphonewhentheboxisfull.Andaparticularpieceofequipmentbreaksupthenon-recyclables.Sorting(分类)recyclablesbeforetheyarecollectedsavestheuseofexpensivematerialsrecoveryequipmentwhichotherwisehastodothesorting.Suchequipmentoftenmakesrecycledmaterialsveryexpensive,soexpensivethattonesofrecyclablesremainwasted.Shantzisbelieveshissystemcouldhelprecycledmaterialsbecomemorecost-effective.Thepurposeinwritingthistextis_________.Atoencouragepeopletorecycletheirrubbish.BtointroducearecyclingsystemforhighrisesCtodescribetheuseofcomputertechnologyinrecyclingDtoexplaintheneedforrubbishcollectioninhighriseKey:B
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