上海高考英语选词填空专项试2————————————————————————————————作者：————————————————————————————————日期：3SectionBDirections:Completethefollowingpassagebyusingthewordsinthebox.Eachwordcanonlybeusedonce.Notethatthereisonewordmorethanyouneed.A.accurateB.alterationC.averageD.calculatesE.concealF.enormouslyG.initialH.intervalsI.merelyJ.multiplyK.predictionBeyondtwoorthreedays,theworld’sbestweatherforecastsarebasedonguesswork,andbeyondsixorseventheyareworthless.TheButterflyEffectisthereason.Forsmallpiecesofweather—andtoaglobalforecaster,smallcanmeanthunderstormsandsnowstorms—any___41___failsrapidly.Errorsanduncertainties___42___,gatheringupwardthroughachainofunstablefeatures,fromdustdevils(尘旋风)andwindstormsuptocontinent-sizeeddies(旋风)___43___satellitescansee.Themodernweathermodelsworkwithanetworkofpointsoftheorderofsixtymilesapart,andevenso,some___44___datahastobeguessed,sincegroundstationsandsatellitescannotseeeverywhere.Butsupposetheearthcouldbecoveredwithsensorsspacedonefootapart,risingatone-foot___45___allthewaytothetopoftheatmosphere.Supposeeverysensorgivesperfectly___46___readingsoftemperature,pressure,dampness,andanyotherquantityameteorologist(气象工作者)wouldwant.Exactlyatnoona(n)___47___powerfulcomputertakesallthedataand___48___whatwillhappenateachpointat12.01,then12.02,then12.03⋯ThecomputerwillstillbeunabletopredictwhetherPrinceton,NewJersey,willhavesunorrainonadayonemonthaway.Atnoonthespacesbetweenthesensorswill___49___alterationsthatthecomputerwillnotknowabout,tinyvariationsfromthe___50___.By12.01,thosealterationswillalreadyhavecreatedsmallerrorsonefootaway.Soontheerrorswillhavemultipliedtotheten-footscale,andsoonuptothesizeoftheglobe.4Keys:41-45KJIGH46-50AFDECSectionBDirections:Completethefollowingpassagebyusingthewordsinthebox.Eachwordcanonlybeusedonce.Notethatthereisonewordmorethanyouneed.Rainforests,foundinEarth’stemperateandtropical(热带的)zones,aresomeofthemostbiologicallyvariedecosystemsontheplanet.Allrainforestssharecertain___41___features,includingaclosedcanopy,thedensevegetationofthetopbranchesthatformsaroofabovetheforestfloor,adampandwarmclimate,and___42___constanttemperaturesthroughouttheyear.Mostoftheforest’sinsectandanimallifegrowswellinthecanopy’sleafyandsunlitenvironment.Theforest’sgroundcover,bycomparison,issmall.Lessthan2percentofthesun’slightmakesitswaythroughthecanopyandthedarknessbelow.Thisdarkness,alongwiththepoorqualityofthesoils,___43___plantgrowth.Rainforestsarea(n)___44___partofEarth’stotalecology.Hugeamountsofwaterareabsorbedintotreerootsand___45___intotheatmospherefromthetreeleavesthroughaprocesscalledtranspiration(蒸发).Treerootsalsofixthesoilinplaceandslowtherunoffofrainsintoriversandoceans.Throughtheprocessofphotosynthesis(光合作用),rainforestsabsorbmorecarbondioxideandgiveoffmoreoxygenthananyotherecosystem.Therainforestsare___46___shrinkingatarapidrateasaresultoftheprofitableventuresoffarming,logging,andmining.Whentropicalrainforestsare___47___inordertoraisecattleandcrops,thenutrient-poorsoilsarequicklyA.countlessB.exhaustedC.comparisonD.essentialE.estimatesF.distinctiveG.relativelyH.clearedI.unfortunatelyJ.recycledK.restricts5___48___.Whenfarmersmoveontonewareas,heavyrainsandbakingsunleavethelandfruitlessandlifeless.Loggingandminingcausesimilardamagetothe...
