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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