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1、Unit2Custommakesallthingseasy.有个好习惯,事事皆不难。学习内容题材词数建议时间得分统计做题备忘PartAText1科普知识394/10Text2商业经济396/10Text3社会生活439/10Text4科普知识401/10PartB生态环境612/10PartC文化教育473/10PartADirections:Readthefollowingtexts.Answerthequestionsbloweachtextbychoosing[A],[B],[C]or[D].Text1In1967,inrespo
2、nsetowidespreadpublicconcernarousedbymedicalreportsofasbestos-relateddeaths,theNationalMedicalResearchCouncilorganizedcommitteeofinquirytoinvestigatethehealththreatsassociatedwiththeuseofasbestosinthebuildingindustry.Afterexaminingevidenceprovidedbymedicalresearchersandb
3、uildingworkersandmanagement,theCouncilpublishedareportwhichincludedadvicefordealingwithasbestos.ThereportconfirmedthefindingsofsimilarresearchintheUnitedStatesandCanada.Exposuretorelativelysmallquantitiesofasbestosfibers,theyconcluded,wasdirectlyresponsibleforthedevelopm
4、entofcancers,asbestosisandrelateddiseases.Takingintoaccountevidenceprovidedbyeconomistsandbuildingindustrymanagement,however,thereportassumedthatdespitetheavailabilityofothermaterials,asbestoswouldcontinuetoplayamajorroleintheBritishbuildingindustryformanyyearstocomebeca
5、useofitsavailabilityandlowcost.Asaresult,thecouncilgaveaseriesofrecommendationswhichwereintendedtoreducetheriskstothosewhomightbeexposedtoasbestosinworkingenvironments.Theyrecommendedthat,wherepossible,asbestosfreematerialsshouldbeemployed.Incaseswhereasbestoswasemployed
6、,itwasrecommendedthatitshouldbeusedinsuchawaythatloosefiberswerelesslikelytoentertheair.Thereportrecommendedthatspecialcareshouldbetakenduringworkinenvironmentswhichcontainasbestos.Workersshouldwearprotectiveequipmentandtakespecialcaretoremovedustfromtheenvironmentandclo
7、thingwiththeuseofvacuumcleaner.Thereportidentifiedfivefactorswhichdeterminethelevelofriskinvolved.Thestateandtypeofasbestosiscriticaltodeterminingtheriskfactors.Inaddition,dustformationwasfoundtobelimitedwhereasbestoswasusedwhenwetratherthandry.Thechoiceoftoolswasalsofou
8、ndtoaffectthequantitiesofasbestosparticlesthatentertheair.Machinetoolsproducegreaterquantitiesofdusttha