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高三英语阅读理解专项训练科技环保类文章在高考英语试题中出现的频率最高，几乎每年都有一片，如NMET2004（1）D篇，NMET2003E篇，NMET2002A篇，NMET2001C篇等。此类文章一般为说明文，但也常常夹杂着叙述和议论，并经常出现一些较新的科技名词或术语。考生若经常阅读英语报刊，具备丰富的课外知识，并积累一定的时新词汇，对解读此类文章会大有帮助。A难度：难字数：258words标准用时：6minutes实际用时：_________AdevicethatstopsdrivesfromfallingasleepatthewheelisabouttoundergotestingatDepartmentofTransportlaboratoriesandcouldgoonsalewithin12months.Thesystem,calledDriverAlert,aimstoreducedeadlyroadaccidentsby20%—40%thatarecausedbytiredness.Airlinepilotscanalsouseittoreducethe30%ofallpilot-erroraccidentsthatarerelatedtofatigue.DriverAlertisbasedonacomputerizedwristband.Thedevice,wornbydrivesorpilots,givesoutasoundabouteveryfourminutesduringacarjourney.Aftereachsoundthedrivermustrespondbysqueezingthesteeringwheel(方向盘).Asensorinthewristbanddetectsthispressingactionandmeasuresthetimebetweenthesoundandthedriver'sresponse.Tirednessisdirectlyrelatedtoadriver'sresponsetime.Usually,awatchfuldriverwouldtakeabout400millisecondstorespond,butoncethatfallstomorethan500milliseconds,itsuggeststhatthedriverisgettingsleepy.Insuchcasesthedevicegivesoutmoreregularandloudersounds,showingthatthedrivershouldopenawindoworstopforarest.Ifthedriver'sresponsecontinuestoslowdown,thesoundsbecomemorefrequentuntilanonstopalarmwarnsthatthedrivermuststopassoonaspossible.Thedevicehasbeendeliveredtothedepartment'slaboratoriesfortesting.Ifthesetests,scheduledforsixmonths'time,aresuccessful,themakerswillbringtheproducttomarketwithinaboutayear.1.Accordingtothetext,DriverAlert______.A.aimstoreducetiredness-relatedaccidentsB.aimstopreventdriversfromsleepingC.hasgonethroughtestingatlaboratoriesD.hasbeenonsalefor12months2.HowshouldadriverrespondtothesoundsfromDriverAlert?A.Bysoundingawarning.B.Bycheckingthedrivingtime.C.Bytouchingthewristhand.D.Bypressingthesteeringwheel.3.Wecanlearnfromthetextthatthedriverneedstostopforabreakwhenhisresponsetimeis_____.A.about400millisecondsB.over500millisecondsC.below500millisecondsD.about4minutes4.Whenthedrivergetssleepywhiledriving,DriverAlert______.A.movesmoreregularlyB.opensthewindowforthedriverC.stopsworkingproperlyD.soundsmorefrequentlyandloudlyB难度：易字数：266words标准用时：4minutes实际用时：_________Alzheimer'sdiseaseisamajornationalhealthproblem.Nearly2millionAmericansovertheageof65haveAlzheimer'sdisease.Itisaleadingcauseofdeathamongtheelderly.ButAlzheimer'sdiseaseisnotconfined(限于)totheaged.Theremaybeamillionormorepeopleundertheageof65sufferingfromthedisease.Atonetime,peoplesufferingfromthediseaseweresaidtobegettingold.Thediseasewasthoughttobeanaturalpartofgrowingold,butitisnowknownthatAlzheimer'sdiseasestrikesyoungandoldalike.Itisanorganic(器官的)diseasethatdestroysbraincells.Alzheimer'sdiseaseaffectsthepatient'smemory,speech,andmovement.Inthebeginningstagesofthedisease,thepatientmayseemslightlyconfused.Hemayhavetroublespeaking.Thenthepatient'smemorybeginstofail.Hemayforgetdates,telephonenumbers,namesandplans.Asthediseaseprogresses,thepatientmaynotrecognizefamilyandfriends.Thesesymptoms(症状)oftencauseterribleanxietyinthepatient.Hemayfeellostandfrightened.Sometimesthepatientreactswithwildandbadbehavior.Inthelaststagesofthedisease,thepatientmaynotbeabletotakecareofhimself.Hemayhavelosttheabilitytospeakandwalk.Scientistsdon'tknowexactlywhatcausesAlzheimer'sdisease.Itmaybecausedbyavirus(病毒).Itmaybecausedbyapoisonoussubstance(物质)intheenvironment.Atpresent,thereisnocureforthedisease.Buttherearewaystoslowitsprogress.Exerciseandphysicaltreatmentcanhelpthepatientsofthisdisease.5.ThemainideaofthepassageisthatAlzheimer'sdisease_______.A.isaterriblepartoftheagingprocessB.isanorganicdiseasethataffectsyoungandoldC.canbecuredbyphysicaltreatmentD.causesforgetfulness6.AllofthefollowingaresymptomsofAlzheimer'sdiseaseEXCEPT_______.A.forgetfulnessB.difficultyinspeakingC.lossofsightD.lossoftheabilitytowalk7.Accordingtothepassage,whichofthefollowingmaybeacauseofAlzheimer'sdisease?A.Poisonsproducedbythebrain.B.Gettingold.C.Avirus.D.Lackofexercise.8.TheprogressofAlzheimer'sdiseasecanbeslowedby______.A.operationB.achangeinenvironmentC.medicinesD.physicaltreatmentandexerciseC难度：中字数：303words标准用时：5minutes实际用时：_________WhenIopenedmye-mailtheotherday,aprettywomannamedRachelappearedonmycomputerscreen.Shegreetedmebynameandstartedtalkingwithgreatenthusiasm.Everynowandthenshestoppedtosmileatmeorblowakiss.Shewasreadingtomeane-mailfrommybrother,andalotofitwasabouthisgettingthephonecompanytogivehimahigh-speedInternetconnection.Itwasprettycool.RachelwastherethankstoanewtechnologycalledFacemail.Facemailletsyousende-mailthatgetsreadytothereceiverbyanattractivemaleorfemaleformorbyaclown(小丑).Thesoftware,whichisfree,canbedownloadedat(模拟)emotionsbasedonemotionsthatyouputinyourtext.Forexample,typein-X,andRachelblowsakiss.LifeFX,thecompanythatdevelopstheFacemail,issuretherearebroadbusinessuses.Thereasone-businessisnotpopular,thecompanysays,isthatbuyingovertheInternetlacksthehumantouch.ButwhatifyouwenttotheNikewebsiteandMichaelJordangreetedyoubyname,waitedonyouandpersonallyclosedthesale?Anditistalkingwi