人教新目标(Goforit)初中中考英语阅读理解科普环保类专题练习5附答案解析

人教新目标（Goforit）初中中考英语

阅读理解科普环保类专题练习（五）附答案解析

（已排版可直接打印）

Wealwaysthinkthatit'sOKforustoleaveourplantshomeduringourvacationasplants

won'tscreamlikepets,right?

ArecentstudydonebyagroupofscientistsattheleiAvivUniversityhasdiscovered

thatsomeplantswillscreamwhentheyareunderstress.

Theresearchwascarriedoutontomatoplantsandtobaccoplantsbycuttingtheir

stems（茎）anddepriving（录lj夺）themofwater.Amicrophonewasplaced10cmawayfrom

them.Whentheirstemswerecut,theplantsstarted"screaming"between20and10（）kilohertz,

andthescientistsguessthatthisscreamisprobablymeanttowarnotherplantsnearby.

Whenthetomatoplants*stemswerecut,25ultrasonic（超声的）painsoundswere

recordedinanhour,andatthesametime,15ultrasonicpainsoundswererecordedfromthe

tobaccoplants.Whentheyweredeprivedofwater,thetomatoplantsrecordedevenmorepain

soundswith35painsoundsinanhourwhilethetobaccoplantsrecordedabout11pain

sounds.

Theplantsalsoacteddifferentlytodifferentkindsofstresses.Forexample,the

tobaccoplantsgaveoutastrongernscream"whentheyweredeprivedofwaterthanwhen

theirstemswerecut.Butplantsthatwereinnoimmediate（立亥U的）dangergaveoutlessthan

oneultrasonicsoundperhour.

Thegroupofscientistssaidthatplantsarenotasquietaswehadalwaysthought,but

infacttheirvoicesaresohigh-pitchedthatwejustcan'thearthem.

Lastyear,anotherstudyhasfoundoutthatplantsfeelpainwhentheyaretouchedor

hurtandtheywillgiveoffaterriblesmell.

第1页共36页

(1)WhathavethegroupofscientistsattheTelAvivUniversitydiscovered?

A.Someplantsunderstresswillscream.

B.Plantsindangerscreamtowarnothers.

C.Someplantsunderstressfeelenergetic.

D.Plantsindangergiveoffasweetsmell.

(2)Whatwasthemicrophoneunderlinedinparagraph3usedfbr?

A.Cuttingthestemsofplants.B.Deprivingplantsofwater.

C.Collectingultrasonicsounds.D.Testingdifferentstresses.

(3)Howmanyultrasonicpainsoundsdidthetobaccoplantsgiveoutinanhourwhen

deprivedofwater?

A.11.B.15.C.25.D.35.

(4)Whatcanwelearnfromthepassage?

A.Tomatoplantsactedthesameunderdifferentstresses.

B.Tobaccoplantsgaveoffasmellwhentheyweresafe.

C.Plantsnotinimmediatedangerscreamedmostweakly.

D.Plantsthatfeltpainscreamedloudlyforpeopletohear.

2.阅读理解

Yousendaphototoyourfriendfacetofacethroughyour4Gmobilephone.Heor

shecanreceiveitatonce.Butactually,thephotohastogotothebasestationfirst.Thebase

stationthensendsittoyourfriend.Whenyouuse5G,thephotowillnotgotoabasestation.

Itwillgodirectly(直接地)toyourfriend'smobilephone.Yourfriendreceivesthephoto

muchfaster.ThisisD2Dtechnology.

(1)Youwhenyouuse4G.

A.can*tsendaphototoyourfriend

B.cansendaphototoyourfrienddirectly

C.can'tsendaphototoyourfrienddirectly

(2)Howisphotosentwhenyouuse5G?

A.phone—>phone

B・phone—phone—basestation

C.phone—>basestation—>phone

第2页共36页

（3）Whichoneisrightabout5G?

A.Itisnotconvenient.

B.Itismuchfaster.

C.Itdoesn'tuseD2Dtechnology.

（4）Whatisthetextmainlyabout?

A.D2Dtechnology.B.4Gmobilephone.C.5Gmobile

phone.

3.阅读理解

MonaIslandisanamazingplacetotakeavacation.Someoftheanimalslivingthere

can'tbefoundanywhereelseintheworld.Therearefascinatingbeachesandcavestoexplore

（探险）.Theseaaroundtheislandhascolorfulfishes.

MonaIslandisverysmall.ThegovernmentofPuertoRico（波多黎各）takescareof

theislandandhasmadeitanaturalreserve.Thatmeanstheisland'sanimalsandplantsare

protectedfrombeingharmedbypeople.MonaIslandisdifferentfrommostplacesbecause

peoplearenotallowedtolivethere.Onlyafewparkworkersareabletostay.

Theparkworkers*jobistokeepMonaIslandsafeandwonderful.Rulesmustbe

followedontheisland.Oneruleisthatonly100peopleatatimecanvisittheisland.That

way,theparkworkerscanmakesurethelandandanimalsremainsafe.

Ontheisland,visitorscangotoseeMonaIslandiguanas（鬣蜥）whichliveonlyon

MonaIsland.

Also,visitorscancometotheislandtohaveacloselookatmanykindsoffishes.

Theycandive（潜水）farbelowthesurface.Theyusespecialtoolstobeabletobreatheunder

thewater.Throughtheclearwater,visitorscanseethebrightcolorsofthefishes.

Visitorscanalsoexplorecaves.Someofthecavesevenhavepaintingsonthewalls.

ThesepaintingsweremadebysomeIndianswholivedontheislandhundredsofyearsago.

Afterafulldayoffunactivities,visitorscantakearest,listentothenightsounds,

andwatchthestarsinthehugesky.Thestarsareeasiertosee.Visitorssaythatwatchingthe

starsisamazing.Ifstheperfectendtoaperfectday.

（1）Theunderlined（划线的）wordureserve"inthepassagemeans""in

Chinese.

第3页共36页

A.休息区B.保护区C.风景区

(2)Only100peopleatatimeareallowedtovisittheislandsothat.

A.manyparkworkersareabletostayonMonaIsland

B.theparkworkers*jobistokeepMonaIslandsafeandwonderful

C.theparkworkerscanmakesurethelandandanimalsremainsafe

(3)WhatcanvisitorsdoonMonaIsland?

A.Theycanliveontheislandforseveraldays.

B.TheycangotoseeMonaIslandiguanas.

C.TheycanmeettheIndianswholivedontheislandhundredsofyearsago.

(4)WhichofthefollowingisTRUEaccordingtothepassage?

A.MonaIslandisalargeislandandtakencareofbythegovernment.

B.Fishescandivefarbelowthesurfacewithspecialtools.

C.VisitorsareamazedtowatchthestarsinthehugeskyonMonaIsland.

(5)What'sthebesttitleforthepassage?

A.MonaIsland-anAmazingPlacetoTakeaVacation

B.MonaIsland—aGoodPlacetoWatchStars

C.MonaIsland—theBestPlacetoProtectAnimals

4.阅读理解

AnExperimentReportonGrowingPotatoPlants

Thingsprepared：

apotatothathassprouts

aflowerpotwithsoil

acameratorecordprogress

Observation：

DayOne

ThecolorofthesoillooksdarkerbecauseIhavejustwateredit.Inthecenterofthe

第4页共36页

pot,Icanseeatinysproutthathasgrownfromthepotatounderthesoil.FilcallitBuddy.

Buddyisgreenandyellow.Iwonderhowfastitwillgrow.

Daysix

Withoutmuchchangeinthepastsixdays,IfinallyseesomenewprogressonBuddy

asithasgrowntaller.It'sexcitingtoseenewlifelikethis.IhopeBuddycangrowfaster.

DayEleven

Buddyisgettinglarger!ThreemorenewsproutshavegrownaroundBuddy!Green

leaveshavegrownonthenewsprouts,buttheyhavenotfullygrownyet.IguessIneedtobe

abitmorepatient.

DayThirteen

Buddycontinuestogrowtaller.Theleavesonthenewsproutshavegrownabit.Tm

alsoexcitedtoseemorenewsproutsthathavegrownfromunderthesoil.

DayFifteen

Finally,theleavesontheothersproutsare3cmtall.They'resogreen.Ihopethey

willsoongrowintonewpotatoes.

WhatIhavelearned

It'sreallyinterestingtogrowpotatoes.Duringthesefifteendays,Ihavelearnedthat

growingpotatoplantsneedsplentyofwater.Ifsoilisdry,thepotatowillfailtogrow.Ihave

alsolearnedthatthetemperatureneedstoberight.Ifitistoocold,itwon'tgrow.

Ifeelthatgrowingplantsisjustliketryingtosucceedwithanythinginlifeittakes

notonlytime,butalsolotsofeffortsandpatience.

(1)Thereadingmaterialisanexperimentreportabout.

A.chemistryB.physicsC.biology

(2)Howmanythingsdidthewriterpreparebeforeherexperiment?

A.Three.B.Five.C.Seven.

(3)Howdidthewriterfeelwhenshesawtheprogressofthepotatoplants?

A.Excited.B.Nervous.C.Surprised.

(4)Whatcanweknowfromthewriter'sexperimentreport?

A.”Buddy"grewveryfastinthefirstsixdays.

B.Plentyofwaterisnecessaryforgrowingpotatoplants.

第5页共36页

C.Thewritergotnewpotatoesonthefifteenthdayoftheexperiment.

（5）Whathasthewriterlearnedfromtheexperiment?

A.Oldhabitsdiehard.

B.Romewasn'tbuiltinoneday.

C.Knowledgecomesfromquestioning.

5.阅读理解

Howdoyoufeelaboutnature?Afterspendinghoursindoors,doyoufeelbetterwhen

youvisityourlocalpark?Mostpeoplethinkthatnatureisgoodforourbodiesandbrains.

However,humansarespendingmoretimeinsideandlesstimeoutside.Forexample,the

numberofvisitorstoCanada'snationalparksisgettinglowereveryyear.Andincountries

suchastheUSA,only10%ofteenagersspendtimeoutsideeveryday.Manydoctorsfeelthat

thisisaprobleminthetwenty-firstcentury.

Asaresult,somedoctorsarestudyingtheconnectionbetweennatureandhealth:one

exampleofthisistheworkofDrMatildainSweden.Thedoctorgavepeopleamathstest.

Duringthetest,theirheartrates（心率）werefast.Afterthetest,onegroupofpeoplesatina

3D-virtual-reality（虚拟现实）roomforfifteenminuteswithpicturesandsoundsofnature.

Theirheartrateswereslowerthanpeople'sintheothergroup.

Thevirtualtouchwithnaturehelpedthemfeelmorerelaxed.Anothergoodexample

ofhownatureisgoodforhealthcomesfromCanada.InToronto,researchersstudied31,000

peoplelivinginthecity.Ingeneral,theyfoundthathealthierpeoplelivednearparks.

Becauseofstudieslikethese,somecountriesandcitieswantnaturetobepartof

people'severydaylife.InDubai（迪拜）,forexample,thereareplansforanewshoppingmall

withalargegardensoshopperscanrelaxoutsidewithtrees,plantsandwater.InSwitzerland,

"forestschools"arepopular.Schoolchildrenstudytheirsubjectsintheforestsanddolotsof

exerciseoutside.AndSouthKorea（韩国）isanothergoodexample:ithasnewforestsnearits

citiesandaround13millionpeoplevisittheseforestseveryyear.Soafterbuildingcitiesfor

solong,perhapsifsnowtimetostartrebuildingnature.

（1）WhatdoesParagraph1mainlytalkabout?

A.Teenagers'probleminthe2!stcentury.

B.Howmuchtimewespendoutdoors.

第6页共36页

C.Visitingyourlocalpark.

D.Feelingaboutnature.

(2)Matchthecountriesorcitieswiththeinformationandchoosetherightanswer.

①theUSAa.Childrenstudyintheforestsanddolotsofactivitiesoutside.

②Dubaib.About13millionpeoplevisitnewforestsnearitscitieseveryyear.

(3)Switzerlandc.Anewshoppingmallwithalargegardenwillbebuilt.

④SouthKoread.10%ofteenagersspendtimeoutsideeveryday.

A.①一a②一d③一b④一cB.①一d②一c③一a④一b

C.①一a②一c③一d④一bD.①一d②r③一b④一a

(3)Whatdotheresultsofthestudiesshow?

A.MoreandmoreCanadianswilllivenearparks.

B.Themathstestisdifficultandmakespeoplenervous.

C.Naturecanhelppeoplefeelmorerelaxedandbehealthier.

D.People'sheartratesgetslowerina3D-virtual—realityroom.

(4)Whatcanweinferfromthelastsentenceofthepassage?

A.Natureismoreimportantthancities.

B.Countrylifeishealthierthancitylife.

C.Peoplehavelivedinthecitiesforsolong.

D.Natureshouldbepartofpeople'sdailylife.

6.阅读理解

Tomatoestastegreat.Withalotofvitamins,theyaregoodforyou,too!Peopleall

overtheworldenjoythisamazingfruit.

Notalltomatoesarered.Theycanbeyellow,orange,pink,orwhite.Alltomatoesare

greenbeforetheyarereadytobepicked.Thenthetomatoesturntheirtruecolor.That*swhen

they'rereadytoeat!

TomatoesfirstgrewintheAmericas.TheIncasgrewthemover1,000yearsago.

TheywereintroducedtoEuropebytheSpanishintheearly16thcentury.TheSpanishand

ItaliansseemtohavebeenthefirstEuropeanstoacceptthemasfood.InFrance,peoplegrew

tomatoesinthegardenjusttoenjoytheirbeauty.Manypeopletherethoughttomatoeswould

makethemsick.Itwasyearsbeforesomeofthemwouldeattomatoes.

第7页共36页

Tomatoesarefruits.Theygrowfromseeds.Theywon'tgrowincoldweather.But

withwater,sunlightandwarmth,tomatoesgrowfast.Theycangrowinpotsorintheground.

Astheplantgrowstaller,peoplemayticittoastick.Nextisthebloomingstage.

Flowersappear.Theflowersturnintofruit.Somekindsoftomatoescanbepickedin

aboutsixmoreweeks.Sometomatoesarelarge.Onekindoftomatocanweighasmuchas

twopounds.

Youcaneatrawtomatoes.First,washthem.Then,cutthemupforsaladsor

sandwiches.Tomatoescanbecooked,too.Theycanbegrilled,boiled,orevenfried.Doyou

useketchup?Itismadefromtomatoes.Tomatoesdon'thaveasmell.Buttheytastegreatin

foodsaroundtheworld.ManydishesfromIndiausetomatoes.Spaghettisauceandpizza

fromItalyusethem,too.RawtomatoesareinMexicansalsa.

(1)Fromthepassage,weknowthattomatoes.

A.comeindifferentcolorsB.grewinEuropefirst

C.cangrowinallweathersD.haveaspecialsmell

(2)Theunderlinedphrase"someofthem"inParagraph3refersto

A.somepeopleinIncaB.somepeopleinItaly

C.somepeopleinFranceD.somepeopleinSpain

(3)Whichofthefollowingbestshowsthestructureofthepassage?

A②③④

②③④⑤

①①②③

②③④⑤

(4)Whichofthefollowingisthebesttitleofthepassage?

第8页共36页

A.ValueofTomatoesB.AllaboutTomatoes

C.IncasandTomatoesD.GrowingGreatTomatoes

7.阅读理解

AlexisreadingabookaboutAI,artificialintelligence(人工智能).Hefindsthebook

alittledifficultbutveryinteresting.ThoughthewordAIisverypopularnow,heenjoys

readingitverymuch.HehaslearnedanewideaaboutAIfromthebook.

WhenpeopleaskAIaquestion,itanswersthequestioninaveryshorttime.So,

peoplemayfeelthatAIcanthinkandanswerquestionsashumanbeingsdo.BeforeAlexread

thisbook,hebelievedthis,too.However,thisbooksaysitwillneverhappen.Actually,AI

onlyusesalotofinformationtogetthebestanswer,So,whenithasmoreinformation,the

answerwillbemuchclosertotheperfectone.AItechnologieswillbecleverertoolsfor

humanbeingstouse.ThisbookalsosaysalmosthalfofourjobswillbedonebyAI

technologiesinthenearfuture.PeoplewillsoonfindmoreAItechnologiesinourlives,such

ascheckingthetickets,theprice,people'sfacesandfingers.

So,webelievethatwewillhavemuchhappierliveswiththeseAItechnologies

aroundus.

(1)Whatistheshortformfor"artificialintelligence'1?

A.PC.B.ALC.NBAD.UFO.

(2)WhatdoesAlexthinkofthebook?

A.Difficultbutinteresting.B.Easybutimportant.

C.Popularandinteresting.D.Difficultandimportant.

(3)WhatnewideadoesAlexgetfromthebook?

A.AIcanthinkbyitself.

B・Alcan'tanswerquestionsimmediately.

C.AIcanhaveideasofitsown.

D.AIwillneverthinkbyitself.

(4)Whatisthemeaningoftheunderlinedpart(划线部分)inthearticle?

A.SomeofthejobscanbedonebyAI

B.AllthejobscanbedonebyAI

C•NoneofthejobscanbedonebyAI

第9页共36页

D.AIwilltaketheplaceofhumanbeings

（5）Whichofthefollowingistrue?

A.AIisusedeverywhereintheworldnow.

B.AIwillhaveitsownopinionsinthefuture.

C.AIfindsthebestanswersbyusinginformation.

D.AIthinksandanswersquestionsaspeopledo.

8.阅读理解

Doyoubelieveingreenliving?Readthefollowingblog（博客）andrepliesabouta

fun,easyandcreativewaytomakeyourlifestylegreener.

Whatdoyouthinkofthe"new"hatImadeformysister?Itusedtobemymum's

sweater.

Newusesforoldclothing

Nowadays,we*remorewastefulthanever-buying,usingandthrowingthingsaway

withoutthinkingaboutthecosts.Weneedtostartlivingmoreresponsibly-buthow?

Oneansweristoupcycle（再生利用）.

Ifyou'relikeme,youmightalreadymakesoilforgardeningfromfoodwasteanduse

emptypaperboxesasstoragespace.Didyouknowyoucanapply（应用）thesameway

tooldclothing?Youjustneedimagination!

Istartedupcyclingclothing.Makingnewthingsoutofoldclothesisthebestwaytomix

mytalentandmyinterest.Doyouupcycle?Ifso,whatnewthingshaveyoumade?If

not,whynotgiveitatry?

第10页共36页

Terry^Postedat9:08a.m.on11thFebruary2018

Reply

Whydon*tyougiveyouroldclothestopeopleinneed?Ievengiveawaythemost

expensivethingsIdon'twearanymore.SoIcanhelptheenvironmentwhilegiving

somethingusefultopeopleinneed.

Gm^Postedat9:28a.m.on11thFebruary2018earlyReply

Goodpoint!Fmtalkingaboutonlytheoldestclothinginyourroom—theclothesthat

aretoooldtobewornbyothers.Thesameideagoesforfoodwasteatrestaurantsand

supermarkets.Beforeupcyclingfoodthatcanstillbeeaten,forexample,usingitto

makesoil,weshouldgiveittothoseinneed.

Betty99Pos招dat10:18a.m.on11thFebruary2018[Reply.

I'vemadeshoppingbagsoutofT-shirtsanddogtoysoutofsocks.

Upcyclingclothingisafunhobby,butthemostimportantthingisthatitmakesmefeel

likeI'mlivinglesswastefully.

(1)Whatisspecialaboutthehat?

A.Itcamefromanoldsweater.B.ItwasgivenbyGina*smum.

C.Itwasnewandexpensive.D.ItwasagiftfromGina'ssister.

(2)WhydidGinagiveareplytoTerryB?

A.TodrawTerryB'sattention.B.Tointroduceanewmethod.

C.Tofurtherexplainheridea.D.Toexpressherdeepregret.

(3)WhatdidBetty99upcycletomakedogtoys?

A.Paperboxes.B.Shoppingbags.C.T-shirts.D.Socks.

第11页共36页

9.阅读理解

Basketball,runningandswimmingarepopularevents（项目）attheOlympics.But

therearealsosomeeventsthatarenotaspopular.Someareevenverystrange.Let*sseeifyou

haveanyknowledgeaboutthefollowingevents.

Tug-of-war

Thiseventstartedin1900andleft

theOlympicsin1920.Theteamwinsif

theypulltheropepastacertainpoint

first.Interestingly,morethanoneteam

fromacountrycanenterinthisevent.

Thismakesitpossibleforonecountryto

winseveralmedals

Ropeclimbing

ItfirstappearedasanOlympicsport

in1896.Theclimberwhospendsthe

shortesttimereachingthetopisthe

winner.Theropeusedtobe15meters

long.Yearslater,itwasshortenedto8

meters,forsomereason.After1932,there

wasnoropeclimbingintheOlympics.

Racewalking

Inracewalking,walkershavetowin

theracebywalking.Tomakesurethat

theydonotrun,racewalkersmusthave

onefootonthegroundatalltimes.Race

walkinghasbeenanOlympicsportsince

11904.Menenterin20kilometerand50

kilometerraces;womenonlyrace20

kilometers.

第12页共36页

（1）WhichofthefollowingeventslefttheOlympicsin1920?

A.RopeclimbingB.BasketballC.Tug-of-warD.Race

walking

（2）Theropeinropeclimbingwasmeterslongin1896

A.8B.15C.20D.50

（3）WhichofthefollowingisTRUEaccordingtothepassage?

A.Onecountrycanonlyenteroneteamintug-of-war.

B.Ropeclimbingfirstappearedinthe1932Olympics.

C.Womeninracewalkingcanenterinthe50kilometerrace.

D.RacewalkingisstillaneventattheOlympicGamestoday.

10.阅读理解

Inthefuture,peoplemaytraveltoMars（火星）bywater-poweredspaceship!Today's

spaceshipsarefineforgettingthingsintospace,buttheyarenotsogoodattravellinglong

distances.Thesespaceshipsburnchemicalfuels（燃料）andtheyareveryexpensive.

Scientistssaythatawater-poweredspaceshipcouldmakethetriptoMarsmuchcheaper.The

ideaisjustintheplanningstagesnow,butscientiststhinksuchaspaceshipcouldbe

developedsoon.

Thekeytothewater-poweredspaceshipistheengine（发动机）Regularenginespush

spaceshipsbyburningfuel.Thewaterenginewillusesteam,createdbysolarpanels（太阳能

板）thatheatwatertoahightemperature.Ofcourse,thespaceshipwillhavetocarryalotof

waterforthelongtriptoMars.

Today'sspaceshipscouldnotcaythatmuchwaterButscientiststhinkthataspaceship

blownuplikeaballoonwillbeableto

OneUScompanyhasalreadydevelopedaspaceshiplikethis.Thesespaceshipsare

madeofastrongmaterial.Twoofthemhavealreadybeensentupintospace,usingrockets

andthenlaterfilledwithair."Balloon**spaceshipscouldbeverylargeandcarryenoughwater

foralongtrip.Withthe"Balloon'1spaceships,enoughwatercouldbecarriedtopowerthe

enginesandgrowfoodduringthetrip.Andthepeopleonthespaceshipmightevengettotake

ahotbath!

Scientistssaythebiggestadvantageofsuchaspaceshipwouldbecost.The"Balloon"

第13页共36页

spaceshipuseswatertopushitthroughspaceandcostsaboutonethirtiethofanormal

spaceship.Suchsavingsnaturallyencouragecontinuedresearchintoballoonspaceshipsand

waterengines.Ifthesescientistsarecorrect,wemaysoonbeonourwaytoMarsina

spaceshippoweredbywater.

(1)Whichsentencebestdescribesthemainideaofthepassageabove?

A.Thekeytothewater-poweredspaceshipistheengine.

B.Inthefuture,peoplemaytraveltoMarsbywater-poweredspaceship.

C.OneUScompanyhasalreadydevelopedaspaceshiplikethis.DScientistssaythe

biggestadvantageofsuchaspaceshipwouldbecost.

(2)Whatdoyouthinkisomitted(省略)attheendoftheunderlinedsentence?

A.usesteamB.pushspaceships

C.heatwaterD.carrythatmuchwater

(3)Besidesgrowingfood,whatelsemightastronautsdowiththerestofthewater?

A.Takeahotbath.B.Freezedangerousthings.

C.Blowupaballoon.D.ChangethesurfaceofMars.

(4)Onwhichwebsitecanweprobablyreadthispassage?

A./powerB./music

C.www.chinadaily,/cultureD.www.space,com/spaceflight

第14页共36页

人教新目标（Goforit）初中中考英语

阅读理解科普环保类专题练习（五）答案解析

（已排版可直接打印）

Wealwaysthinkthatit'sOKforustoleaveourplantshomeduringourvacationas

plantswon'tscreamlikepets,right?

ArecentstudydonebyagroupofscientistsattheTelAvivUniversityhasdiscovered

thatsomeplantswillscreamwhentheyareunderstress.

Theresearchwascarriedoutontomatoplantsandtobaccoplantsbycuttingtheir

stems（茎）anddepriving（录U夺）themofwater.Amicrophonewasplaced10cmawayfrom

them.Whentheirstemswerecut,theplantsstarted"screaming"between20and100kilohertz,

andthescientistsguessthatthisscreamisprobablymeanttowarnotherplantsnearby.

Whenthetomatoplants*stemswerecut,25ultrasonic（超声的）painsoundswere

recordedinanhour,andatthesametime,15ultrasonicpainsoundswererecordedfromthe

tobaccoplants.Whentheyweredeprivedofwater,thetomatoplantsrecordedevenmorepain

soundswith35painsoundsinanhourwhilethetobaccoplantsrecordedabout11pain

sounds.

第15页共36页

Theplantsalsoacteddifferentlytodifferentkindsofstresses.Forexample,the

tobaccoplantsgaveoutastrongernscreamnwhentheyweredeprivedofwaterthanwhen

theirstemswerecut.Butplantsthatwereinnoimmediate(立亥||的)dangergaveoutles