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:U!十二篇MoreaboutAlzheimer.sDiseaseScientistshavedevelopedskinteststhatmaybeusedinthefuturetoidentifypeoplewithAlzheimer'sdiseaselandmayultimatelyallowphysicianstopredictwhoisatriskofgettingthisneurologicaldisorder.1Theonlycurrentmeansofdiagnosingthediseaseinalivingpatientisalongan

2、dexpensiveseriesofteststhateliminateeveryothercauseofdementia.〃SinceAloisAlzheimerdescribedthediseasenearlyacenturyago,peoplehavebeentryingtofindawaytoaccuratelydiagnoseitinitsearlystages2,〃saidPatriciaGrady,actingdirector3oftheNationalInstituteofNeurologicalDisordersandStrokeinBethe

3、sda,Maryland.’’Thisdiscovery,ifconfirmed,couldproveabigstepforwardinoureffortstodealwithandunderstandthedisease.Alzheimer'sisthesinglegreatestcause4ofmentaldeteriorationinolderpeople,affectingbetween2.5millionand4millionpeopleintheUnitedStatesaloneS.Thedevastatingdisordergraduallydes

4、troysmemoryandtheabilitytofunction,andeventuallycausesdeath.6Thereiscurrentlynoknowntreatmentforthedisease.ResearchesdiscoveredthattheskincellsofAlzheimer1spatientshavedefectsthatinterferewiththeirabilitytoregulatetheflowofpotassiuminandoutofthecells.Thefactthatthecelldefectsareprese

5、ntintheskinsuggeststhat7Alzheimer'sresultsfromphysiologicalchangesthroughoutthebody,andthatdementiamaybethefirstnoticeableeffectofthesechangesasthedefectsaffectthecellsinthebrain,scientistssaid.Theflowofpotassiumisespeciallycriticalincellsresponsibleformemoryformations.Thescientistsa

6、lsofoundtwootherdefectsthataffectthecells1supplyofcalcium,anothercriticalelement.Onetestdevelopedbyresearchescallsfor9growingskincellsinalaboratorycultureandthentestingthemwithanelectricaldetectortodetermineifthemicroscopictunnelsthatgoverntheflowofpotassiumareopen.Openpotassiumchann

7、elscreateauniqueelectricalsignature.AspokesmanfortheAlzheimer'sAssociationsaidthatifthevalidityofthediagnostictestcanbeprovenitwouldbeanimportantdevelopment,butcautionedthatotherpromisingtestsforAlzheimer'shavebeendisappointing.10词汇：neurological/inju9r91Dd3ik9l/adj.神经病dementia/diImen

8、jis/n.痴呆dete