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1、SectionBDirections:Completethefollowingpassagebyusingthewordsinthebox.Eachwordcanonlybeusedonce.Notethatthereisonewordmorethanyouneed.A.accurateB.alterationC.averageD.calculatesE.concealF.enormouslyG.initialH.intervalsI.merelyJ.multiplyK.predictionBeyondtwoorthreedays,theworld’sbestweatherf
2、orecastsarebasedonguesswork,andbeyondsixorseventheyareworthless.TheButterflyEffectisthereason.Forsmallpiecesofweather—andtoaglobalforecaster,smallcanmeanthunderstormsandsnowstorms—any___41___failsrapidly.Errorsanduncertainties___42___,gatheringupwardthroughachainofunstablefeatures,fromdustd
3、evils(尘旋风)andwindstormsuptocontinent-sizeeddies(旋风)___43___satellitescansee.Themodernweathermodelsworkwithanetworkofpointsoftheorderofsixtymilesapart,andevenso,some___44___datahastobeguessed,sincegroundstationsandsatellitescannotseeeverywhere.Butsupposetheearthcouldbecoveredwithsensorsspace
4、donefootapart,risingatone-foot___45___allthewaytothetopoftheatmosphere.Supposeeverysensorgivesperfectly___46___readingsoftemperature,pressure,dampness,andanyotherquantityameteorologist(气象工作者)wouldwant.Exactlyatnoona(n)___47___powerfulcomputertakesallthedataand___48___whatwillhappenateachpoi
5、ntat12.01,then12.02,then12.03…ThecomputerwillstillbeunabletopredictwhetherPrinceton,NewJersey,willhavesunorrainonadayonemonthaway.Atnoonthespacesbetweenthesensorswill___49___alterationsthatthecomputerwillnotknowabout,tinyvariationsfromthe___50___.By12.01,thosealterationswillalreadyhavecreat
6、edsmallerrorsonefootaway.Soontheerrorswillhavemultipliedtotheten-footscale,andsoonuptothesizeoftheglobe.Keys:41-45KJIGH46-50AFDECSectionBDirections:Completethefollowingpassagebyusingthewordsinthebox.Eachwordcanonlybeusedonce.Notethatthereisonewordmorethanyouneed.A.countlessB.exhaustedC.comp
7、arisonD.essentialE.estimatesF.distinctiveG.relativelyH.clearedI.unfortunatelyJ.recycledK.restrictsRainforests,foundinEarth’stemperateandtropical(热带的)zones,aresomeofthemostbiologicallyvariedecosystemsontheplanet.Allrainforestssharecertain___41___features,
