2014年全国职称英语考试 卫生类a级 阅读理解与完形填空考前预测 已排序 密押(卫生a)

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1、阅读理解：第四十二篇MoreaboutAlzheimer'sDiseaseScientistshavedevelopedskinteststhatmaybeusedinthefuturetoidentifypeoplewithAlzheimer'sdisease1andmayultimatelyallowphysicianstopredictwhoisatriskofgettingthisneurologicaldisorder.'Theonlycurrentmeansofdiagnosingthediseaseinalivingpat

2、ientisalongandexpensiveseriesofteststhateliminateeveryothercauseofdementia.“SinceAloisAlzheimerdescribedthediseasenearlyacenturyago，peoplehavebeentryingtofindawaytoaccuratelydiagnoseitinitsearlystages2，”saidPatriciaGrady，actingdirector3oftheNationalInstituteofNeurologica

3、lDisordersandStrokeinBethesda,Maryland."Thisdiscovery,ifconfirmed,couldproveabigstepforwardinoureffortstodealwithandunderstandthedisease.”Alzheimer'sisthesinglegreatestcause4ofmentaldeteriorationinolderpeople,affectingbetween2.5millionand4millionpeopleintheUnitedStatesal

4、one5.Thedevastatingdisordergraduallydestroysmemoryandtheabilitytofunction，andeventuallycausesdeath.6Thereiscurrentlynoknowntreatmentforthedisease.ResearchesdiscoveredthattheskincellsofAlzheimer'spatientshavedefectsthatinterferewiththeirabilitytoregulatetheflowofpotassium

5、inandoutofthecells.Thefactthatthecelldefectsarepresentintheskinsuggeststhat7Alzheimer'sresultsfromphysiologicalchangesthroughoutthebody，andthatdementiamaybethefirstnoticeableeffectofthesechangesasthedefectsaffectthecellsinthebrain,scientistssaid.Theflowofpotassiumisespec

6、iallycriticalincellsresponsibleformemoryformation8.Thescientistsalsofoundtwootherdefectsthataffectthecells'supplyofcalcium,anothercriticalelement.Onetestdevelopedbyresearchescallsfor9growingskincellsinalaboratorycultureandthentestingthemwithanelectricaldetectortodetermin

7、eifthemicroscopictunnelsthatgoverntheflowofpotassiumareopen.Openpotassiumchannelscreateauniqueelectricalsignature.AspokesmanfortheAlzheimer'sAssociationsaidthatifthevalidityofthediagnostictestcanbeprovenitwouldbeanimportantdevelopment,butcautionedthatotherpromisingtestsf

8、orAlzheimer'shavebeendisappointing.10词汇：neurological/inju9r9'lDd3ik9l/adj.神经病学的dementia/di丨menjis/n.痴呆d