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1、理工类1一级重点（2010年新增文章）1第一篇AvalancheandItsSafety（C）1第二篇TakingaNapDuringtheDay（B）2二级文章（题库未考查文章）4CaptainCookArrowLegend4CarThievescouldBeStoppedRemotely5ChinatohelpEuropeDevelopGPSRival6WonderWebs7三级文章（已考查）8Animal's"SixthSense"（C）8SingingAlarmsCouldSavetheBlind（C）9AnIntelligentCar（
2、C）9ABiologicalClock（C）10LessIsMore（B）11理工类一级重点（2009年新增文章）第一篇AvalancheandItsSafety（C）Anavalancheisasuddenandrapidflowofsnow,oftenmixedwithairandwater,downamountainside.Avalanchesare1thebiggestdangersinthemountainsforbothlifeandproperty.Allavalanchesarecausedbyanover-burdenofma
3、terial,typicallysnowpack,thatistoomassiveandunstablefortheslope2supportsit.Determiningthecriticalload,theamountofover-burdenwhichis3tocauseanavalanche,4acomplextaskinvolvingtheevaluationofanumberoffactors.Terrainslopesflatterthan25degreesorsteeperthan60degreestypicallyhavealo
4、w5ofavalanche.Snowdoesnot6significantlyonsteepslopes;also,snowdoesnot7easilyonflatslopes.Human-triggeredavalancheshavethegreatestincidencewhenthesnow'sangleofrestis835and45degrees;thecriticalangle,theangleatwhichthehumanincidenceofavalanchesisgreatest,is38degrees.Theruleofthu
5、mbis:Aslopethatis9enoughtoholdsnowbutsteepenoughtoskihasthepotentialtogenerateanavalanche,regardlessoftheangle.Additionally,avalancheriskincreaseswith10;thatis,themoreaslopeisdisturbedbyskiers,themorelikelyitisthatanavalanchewilloccur.Duetothecomplexityofthesubject,wintertrav
6、ellinginthebackcountryisnever100%safe.Goodavalanchesafetyisacontinuous11,includingrouteselectionandexaminationofthesnowpack,weather12,andhumanfactors.Severalwell-knowngoodhabitscanalso13therisk.Iflocalauthoritiesissueavalancheriskreports,theyshouldbeconsideredandallwarningssh
7、ouldbepaid14to.Neverfollowinthetracksofotherswithoutyourownevaluations;snowconditionsarealmostcertaintohavechangedsincetheyweremade.Observetheterrainandnoteobviousavalanchepathswhereplantsare15ordamaged.Avoidtravelingbelowotherswhomighttriggeranavalanche.练习：1.AamongBofCtoDin2
8、.AwhenBthatCwhoDwhose3.AmostlyBlikelyCclearlyDsurely4.AareBwillbeCis
