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雅思聽(tīng)力閱讀文本IELTS劍9(TEST1)聽(tīng)力Section1W:Goodevening.King'srestaurant.M:Goodevening.I'mringingaboutthejobIunderstandyouhavevacant?W:Oh,yes.M:I'dliketofindoutafewmoredetailsifImay.W:Yes,ofcourse.CanI(lǐng)takeyourname?M:It'sPeterChin.W:Ok,Peter.Well,ifyouwanttoaskaboutthejobandthenifwe'rebothstillinterested,wecouldarrangeyoutocomeforaninterview.M:Great,thanks.I'mafraidImissedtheadvertforthejobbutIheardaboutitfromafriend.W:That(yī)'snoproblematall.What(yī)wouldyouliketoknow?M:Well,um,whatsortofworkisit-washingup?W:It'sansweringthephone.M:Oh,right,fine.W:Andnotwaitingattable.M:That'llbegood.Andhowmanynightsaweekwoulditbe?W:Well,we'rereallyonlybusyattheweekend.M:Sotwonights?W:Three(cuò)actually,soitwouldworkout12hoursawee(cuò)k.M:That(yī)'dbefine.Itwouldn'tinterferewithmystudies.W:Areyouintheuniversity?M:Yes,firstyearPhysicsstudent.W:Oh,rightM:BecauseI'mnotanEUnational,wouldIneedaworkpermit?W:Yes,youwould.Justgetyoututortosignit.M:Thatwouldn'tbeaproblemifIweretogetthejob.Um,wheree(cuò)xactlyistherestaurant?W:Well,wehavetwobranches-theonewe'rerecruitingforisinHillsdunneroad.M:Em,Idon'tknowthat.Howdoyouspellit,please?W:It'sH-I-doubleL-S-D-U-doubleN-ERoad.M:Gotthat(yī),thanks.Isitnearabusstop?W:Yes,thenearestonewouldprobablybejustbesidethelibrary.M:Oh,yes,Iknowit.That'llbefineforme.AndcouldIaskaboutthepay?W:We'reoffering4.45poundsanhour.M:That'sverygood.Mylastjobwas3.95anhour.W:Wefee(cuò)lit'sprettygoodandwealsooffersomegoodfringebenefits(附加福利).M:Really?W:Well,wegiveyouafreedinner,soyoueat(yī)well.M:Right.Betterthanhostelfood.W:Wecertainlyhopeso.Andwealsoofferextrapayforworkingonnationalholidays.M:Oh,that'sareallygoodperk(額外收入),isn'tit?W:Yes,wethinkso.Andthenbecauseofthedifficultiesofgettingpublictransport,ifyou'reworkingafter11o'clock,wedriveyouhome.M:Oh,that'sgoodtoknow.W:We'dcertainlybeinterestedininvitingyouforaninterview,ifyou'restillinterested?M:Oh,yes,certainly.CouldIjustalsoaskwhatqualitiesyou'relooingfor?W:Well,forthisparticularjob,wewantaclearvoice,whichyouobviouslydohaveM:Thanks.W:Andyoumustbeabletothinkquickly,youknow.M:Well,IhopeI'd...W:So,whencouldyoucomeinforaninterview?We'reactuallyquitequiettonight?M:Sorry,Icouldn'tcometonightortomorrow,I'mafraid.Thursdayisok,that'dbe22ndofOctober.W:Fine,after5pm?M:Yes,fine.Would6o'clockbeok?W:Perfect.Andcouldyoubringalongthenamesoftworeferees?M:Yes,that'sfine.Noproblem.W:Good,Ilookforwardtoseeingyou.M:Oh,bytheway,whoshouldIaskfor?W:Oh,yes,ofcourse,sorry.MynameisSamiraManuja.M:Canyouspellthatplease?W:M-a-n-u-j-aM:Ok,I'vegotthat.Thankyouverymuch.W:Lookforwardtoseeinglater...聽(tīng)力Section2M:NowwegotoJanewhoisgoingtotellusaboutwhat'shappeningintownthiswee(cuò)kend.W:Right,thanks,Andrew,andnowontowhat'snew,anddowereallynee(cuò)dyetanothersportsshoppingBradcaster?Well,mostofyouprobablyknowSportsWorld-thebranchofaDanishsportsgoodscompanythatopenedafewyearsago-it'sattractedalotofcustom,andsothecompanyhasnowdecidedtoopenanotherbranchinthearea.It'sgoingtobeintheshoppingcentertothewestofBradcaster,sothat(yī)willbegoodnewsforallofyouwhofoundtheoriginalshopintheNorthofthetownhardtogetto.IwasinvitedtoaspecialpreviewandIcanpromiseyou,thisistheultimateinsportsretailing.Thewholeplacehasbeengivenanewminimalist(極簡(jiǎn)主義者)lookwiththecompany'ssignaturecolorsofblackandred.Thefirstthreefloorshaveahugerangeofsportsclothingaswellastheequipment.Andonthetopfloor,thereisacafeandabook&DVDsection.You'llfindallthewell-knownnamesaswellassomelesswell-knownones.Iftheyhaven'tgotexactlywhatyouwantinthestock,theypromisedtogetitforyouin10days,unliketheotherstore,whereitcantakeupto14days.Theycoverallthemajorsports,includingfootball,tennis,andswimming,buttheyparticularlyfocusonrunningandtheyclaimtohavethewidestrangeofequipmentinthecountry.Aswellasthat,awholesectionofthethirdfloorisdevotedtosportsbags,includingthelat(yī)estdesignfromtheStates-Ifyoucan'tfindwhat(yī)youwanthere,itdoesn'texist.Theshopwouldbeopenfrom9amthisSat(yī)urday,andifyougoalongtotheopeningthenyou'llhavethechancetomeetthenational400metersrunningchampionPaulKing,who'scomingalongtoopentheshop,andhewillbestayarounduntilaboutthemiddaytochattoanyfanswhowanttomeethimandsignautographs.Thentherewillbeawholerangeofspecialattractionsallweekend.Therewillbefree(cuò)ticketsforlocalsportingeventsforthefirst50customers,andalsoaspecialcompetitionopentoall,justanswer15outof20sportsquestionscorrectlytowinasignedcopyofPaulKing'sDVD'SpringTips',whilethefirstpersontogetallthequestionscorrectgetsayear'sfreemembershipoftheBradcasterGym.AllentrancewillreceiveaspecialSportscalendarwithdetailsofallBradcasterfixturesinthecomingyear.Oneofthespecialopeningoffersisafitnesstest-acompletereviewofyourcardiacfitnessandmuscletone,actuallydoneintheshopbyqualifiedstaff.Thiswouldnormallycost30poundsbutisavailableathalfpriceforthismonthonly.Thereareonlyalimitednumberofplacesavailableforthis,sotomakeabookingphone560341.Inaddition,ifyouopenanaccountyougetlotsmorespecialoffersincludingthechancetotryouttheequipmentatthespecialopeningevenings...聽(tīng)力Section3Pro:Beforewestart,SpirosandHiroko,thanksforcomingintodaytotalkaboutyourrecentstudyexperiencesandcongratulat(yī)ionstoyoubothindoingsowellinthefirstsemesterexams.I'dliketodiscusswithyouthevalueoftheEnglishforAcademicPurposescourseyoudidherelastyearbeforestartingyouruniversitycourse.Spiros,ifIcouldstartwithyou,what(yī)partsoftheprogrammehavenowprovedtobeparticularlyvaluabletoyou?S:Ithinkthathavingtodoaseminarpresentationreallyhelpedme.Forexample,acoupleofwee(cuò)ksagoinourmarketingsubject,whenitwasmyturntogivepresentation,Ifeltquiteconfident.Ofcourse,IwasstillnervousbutbecauseIhaddoneonebefore,Iknewwhattoexpect.Also,IknowIwaswellpreparedandIhadpractisedmytiming.Infact,Ithinkthat(yī)inrelationtosomeoftheotherpeopleinmygroup,Ididquiteagoodjobbecausemyoverallstylewasquiteprofessional.Pro:What(yī)aboutyouHiroko?H:Mmm,that'sinteresting.Inmygroup,Iwasreallysurprisedbythewaystudentsdidtheirpresentat(yī)ions-theyjustreadthenotesaloud.Canyoubelievethat?Theydidn'tworryabouttheirpresentationstyleorkeepingeyecontactwiththeiraudience-andIrememberthatthesethingswerereallystressedtousinthecoursehere.Pro:So,howdidyouapproachyourpresentationHiroko?H:Well,tospeakfrankly,Ireadmynotestoo.Atthetime,itwasarelieftodoitthisway,butactuallywhenI(lǐng)hadfinishedIdidn'tfellanyrealsenseofsatisfaction.Ididn'tfeelpositiveabouttheexperienceatall.S:That'sapity.YouknowalthoughIwaspleasedwithmypresentation,I'mnotsopleasedwithmyactualperformancerightnowinthetutorials-duringthewholesemesterI'venotsaidanythinginourtutorialdiscussions.Notaword.H:Really,Spiros,whyisthat?Dotheotherstudentstalktoomuch?S:It'spartlythat,butit'smostlybecauseIhavehadnoconfidencetospeakout.Theirstyleofspeakingissodifferen-it'snotthestylewewereusedtoduringthecourse.Therearesomanycolloquialism(白話,口語(yǔ),俗話,方言),theynotverypoliteandsometimestheyseemstobenoorderintheirdiscussion.Alsotheyareveryfamiliarwitheachother,sobecausetheyknoweachother'shabits,theycanleteachotherintothediscussion.H:You'reright,Spiros.I'veexperiencedthattoo.H:Formostofthissemester,I'vesaidabsolutelynothingintwotutorials.ButrecentlyI'vebeentryingtospeakupmoreandIjustjumpin.AndI'venoticedaninterestingthing.I'venoticedthat(yī)iftheythoughtmypointwasinterestingandnew,thenthenexttimetheyactuallyaskedformyopinion,andthenitwasmucheasierformetobepartofthediscussion.S:That'sgreat,Hiroko.Ihopethat(yī)happensformenextsemester-I'llhavetoworkhardtofindsomeinterestingpoints.Whathelpyoutofindtheseideas?H:Ithinkthatonethingthathelpedmewiththiswasthereading.I'vehadtodosomuchreadingthissemesterjusttohelpmetomakesenseofthelectures.AtfirstIcouldn’tunderstandwhatthelecturersweretalkingabout,soIhadtoturntothebooksandjournals.EverynightIreadforhours,usingthelistsofreferencesthatweregiven,andImadepagesofnotes.Atbreakfast,Ireadandreadmynotesagain.Thishabithashelpedmetofollowtheideasinthelectures,andit'salsogivenmesomeideastouseinthetutorials.S:ButIdidsomuchreadingsanyway-Idon'tthinkthere'sanytimeleftoverforanythingextra.Myreadingspeedisstillquiteslow,thoughI'mmuchbetteratdealingwithvocabularythanIusedtobe.Pro:Whatelsedoyouthinkwecouldaddtothecourseprogramtohelpwiththisreadingproblem?S:Er,there'snotreallyanythingbecauseit'smyproblem.Irememberweweregivenlongarticlestoread.Wedidn'tlikethat(yī)butnowIrealisethatreadingthoselongarticleswasgoodpreparationforthethingsIneedtoreadnow.Also,inclassweregularlyhadspeed-readingtaskstodo,andwekeptarecordofourreadingspee(cuò)d,sotheteachersweree(cuò)ncouragingustoworkonthat(yī).H:That'strue,Spiros,butwhatwereadcouldhavebeendifferent.SometimeintheEnglishclassIfeltfrustratedwhenIhadtoreadarticlesabouttheenvironmentorhealthoreducation,becauseIwantedtoconcentrateonmyownfield,butwedidn'treadanythingaboutengineering.So,IthinkIwastedsometimelearningvocabularyIdidn'tneed.Pro:Butsurelythisstrat(yī)egiesyouweretaughtfordealingwiththat(yī)vocabularywerehelpful?H:Yes,butpsychologicallyspeaking,Iwouldhavefeltmuchbetterworkingonreadingfrommyownfield.WhatdoyouthinkSpiros?S:Well,Iagree.That(yī)wouldhavehelpedmyconfidencetoo,andIwouldhavebeenmoremotivated.Anditwasgoodthoughthatwecouldworkonourowntopicswhenwewrotetheresearchassignments.Pro:Ok,that'smoveontowritingnow...聽(tīng)力Section4Goodafternooneveryone.Well,withsomeofyouwillgooutonfieldworkit'stimelythatinthisafternoon'ssessionI'llbesharingsomeideasaboutthereasonswhygroupsofwhalesanddolphinssometimesswimashorefromthesearightontothebeachand,mostoften,dieinwhatwereknownas"massstranding".Unfortunately,thistypeofeventisafrequentoccurrenceinsomeofthelocationsthatyou'llbetravellingto,wheresometimesthetidegoesoutsuddenly,confusingtheanimals.However,therearemanyothertheoriesaboutthecausesofmassstrandings.Thefirstisthat(yī)thebehaviorislinkedtoparasites.It'softenfoundthat(yī)strandedanimalswereinfestedwithlargenumbersofparasites.Forinstance,at(yī)ypeofwormiscommonlyfoundintheearsofdeadwhales.Sincemarineanimalsrelyheavilyontheirhearingtonavigate,thistypeofinfestationhasthepotentialtobeveryharmful.Anothertheoryisrelatedtotoxins,orpoisons.Thesehavealsobeenfoundtocontributetothedeathofmanymarineanimals.Manytoxins,asI'msureyou'reaware,originatefromplants,oranimals.Thewhaleingeststhesetoxinsinitsnormalfeedingbehaviorbutwhetherthesepoisonsdirectlyorindirectlyleadtostrandinganddeath,seemstodependuponthetoxininvolved.In1988,forexample,fourteenhumpbackwhalesexclaimedafterstrandingalongthebeachesofCapeCodewerefoundtohavebeenpoisonedaftereat(yī)ingtunathatcontainedsaxitoxin,thesametoxinthatcanbefataltohumans.Alternat(yī)ively,ithasalsobeensuggestedthatsomeanimalsstrandedaccidentallybyfollowingtheirpreyashoreintheconfusionofthechase.In1995DavidThurstonmonitoredpilotwhalesthatbeachedafterfollowingthesquidashore.However,thisideadoesnotseemtoholdtrueforthemajorityofmassstrandingsbecauseexaminat(yī)ionoftheanimals'stomachcontentsrevealthatmosthadnotbeenfeedingastheystranded.Therewerealsosomenewtheories,whichlinkstrandingstohunmans.Agrowingconcernisthat(yī)loudnoisesintheoceancausestranings.Noisessuchasthesecausedbymilitaryexercisesareofparticularconcernandhavebeenpinpointedasthecauseofsomestrandingsoflate.Oneofthese,amassstrandingofwhalesin2023intheBahamasconincidedcloselywithexperimentsusinganewsubmarinedetectionsystem.Thereareseveralfactorsthatmadethisstrandingstandoutasdifferentfrompreviousstrandings.Thisledresearcherstolookforanewcause.Forone,allthestrandedanimalswerehealthy.Inaddition,theanimalswerespreadoutalong38kilometersofcoast,whereasit'smorefortheanimalstobefoundinagroupwhenmassstrandingsoccur.Afinaltheoryisrelatedtogroupbehaviour,andsugeststhat(yī)seamammalscannotdistinguishbetwee(cuò)nsickandhealthyleadersandwillfollowsickleaders,eventoaninevitabledeath.Thisisaparticularlyinterestingtheorysincethewhalesthatarethoughttobemostsocial-thetoothedwhaled-arethegroupthatstrandthemostfrequently.Thetheoryisalsosupportedbyevidencefromadolphinstrandingin1994.Examinationofthedeadanimalsrevealedthatapartfromtheleader,alltheothershadbee(cuò)nhealthyatthetimeoftheirdeath.Withoutoneconsistenttheoryhoweveritisveryhardforustodoanythingaboutthisphenomenonexcepttoassistanimalwhereandwhenwecan.Strandingnetworkshavebeenestablishedaroundtheworldtoaidinrescuinganimalsandcollectingsamplesformthosethatcouldnotbehelped.IrecommendedJohnConnor'sMarineMammalsashoreasanexcellentstartingpointifyou'reinterestedinfindingoutmoreabouttherenetworks,orestablishingoneyourself.ReadingPassage1WilliamHenryPerkinThemanwhoinventedsyntheticdyesWilliamHenryPerkinwasbornonMarch12,1838,inLondon,England.Asaboy,Perkin’scuriositypromptedearlyinterestsinthearts,sciences,photography,andengineering.Butitwasachancestumblinguponarun-down,yetfunctional,laboratoryinhislategrandfather’shomethat(yī)solidifiedtheyoungman’senthusiasmforchemistry.AsastudentattheCityofLondonSchool,Perkinbecameimmersedinthestudyofchemistry.Histalentanddevotiontothesubjectwereperceivedbyhisteacher,ThomasHall,whoencouragedhimtoattendaseriesoflecturesgivenbytheeminentscientistMichaelFaradayat(yī)theRoyalInstitution.Thosespeechesfiredtheyoungchemist’senthusiasmfurther,andhelaterwentontoattendtheRoyalCollegeofChemistry,whichhesucceededinenteringin1853,attheageof15.AtthetimeofPerkin’senrolment,theRoyalCollegeofChemistrywasheadedbythenotedGermanchemistAugustWilhelmHofmann.Perkin’sscientificgiftssooncaughtHofmann’sat(yī)tentionand,withintwoyears,hebecameHofmann’syoungestassistant.Notlongafterthat,Perkinmadethescientificbreakthroughthatwouldbringhimbothfameandfortune.Atthetime,quininewastheonlyviablemedicaltreatmentformalaria.Thedrugisderivedfromthebarkofthecinchonatree(cuò),nativetoSouthAmerica,andby1856demandforthedrugwassurpassingtheavailablesupply.Thus,whenHofmannmadesomepassingcommentsaboutthedesirabilityofasyntheticsubstituteforquinine,itwasunsurprisingthathisstarpupilwasmovedtotakeupthechallenge.Duringhisvacationin1856,Perkinspenthistimeinthelaboratoryonthetopfloorofhisfamily’shouse.Hewasattemptingtomanufacturequininefromaniline,aninexpensiveandreadilyavailablecoaltarwasteproduct.Despitehisbestefforts,however,hedidnotendupwithquinine.Instead,heproducedamysteriousdarksludge.Luckily,Perkin’sscientifictrainingandnaturepromptedhimtoinvestigatethesubstancefurther.Incorporat(yī)ingpotassiumdichromateandalcoholintotheanilineatvariousstagesoftheexperimentalprocess,hefinallyproducedadee(cuò)ppurplesolution.And,providingthetruthofthefamousscientistLouisPasteur’swords‘chancefavoursonlythepreparedmind’,Perkinsawthepotentialofhisunexpectedfind.Historically,textiledyesweremadefromsuchnaturalsourcesasplantsandanimalexcretions.Someofthese,suchastheglandularmucusofsnails,weredifficulttoobtainandoutrageouslyexpensive.Indeed,thepurplecoulourextractedfromasnailwasoncesocostlythatinsocietyatthetimeonlytherichcouldaffordit.Further,naturaldyestendedtomemuddyinhueandfadequickly.Itwasagainstthisbackdropthat(yī)Perkin’sdiscoverywasmade.Perkinquicklygraspedthathispurplesolutioncouldbeusedtocolourfabric,thusmakingittheworld’sfirstsyntheticdye.Realizingtheimportanceofthisbreakthrough,helostnotimeinpatentingit.ButperhapsthemostfascinatingofallPerkin’sreactionstohisfindwashisnearlyinstantrecognitionthatthenewdyehadcommercialpossibilities.PerkinoriginallynamedhisdyeTyrianPurple,butitlat(yī)erbecamecommonlyknownasmauve(fromtheFrenchfortheplantusedtomakethecolourviolet).HeaskedadviceofScottishdyeworksownerRobertPullar,whoassuredhimthatmanufacturingthedyewouldbewellworthitifthecoulourremainedfast(i.e.wouldnotfade)andthecostwasrelat(yī)ivelylow.So,overthefierceobjectionsofhismentorHofmann,heleftcollegetogivebirthtothemodernchemicalindustry.Withthehelpofhisfatherandbrother,PerkinsetupafactorynotfarfromLondon.UtilisingthecheapandplentifulcoaltarthatwasanalmostunlimitedbyproductofLondon’sgasstree(cuò)tlighting,thedyeworksbeganproducingtheworld’sfirstsyntheticallydyedmaterialin1857.ThecompanyreceivedacommercialboostformtheEmpressEugenieofFrance,whenshedecidedthenewcolourflat(yī)teredher.Verysoon,mauvewasthenecessaryshadeforallthefashionableladiesinthatcountry.Nottobeoutdone,England’sQuee(cuò)nVictoriaalsoappearedinpublicwearingamauvegown,thusmakingitalltherageinEnglandaswell.Thedyewasboldandfast,andthepublicclamouredformore.Perkinwentbacktothedrawingboard.AlthoughPerkin’sfamewasachievedandfortuneassuredbyhisfirstdiscovery,thechemistcontinuedhisresearch.Amongotherdyeshedevelopedandintroducedwereanilinered(1859)andanilineblack(1863)and,inthelate1860s,Perkin’sgreen.ItisimportanttonotethatPerkin’ssyntheticdyediscoverieshadoutcomesfarbeyondthemerelydecorative.Thedyesalsobecamevitaltomedicalresearchinmanyways.Forinstance,theywereusedtostainpreviouslyinvisiblemicrobesandbacteria,allowingresearcherstoidentifysuchbacilliastuberculosis,cholera,andanthrax.Artificialdyescontinuetoplayacrucialroletoday.And,inwhatwouldhavebeenparticularlypleasingtoPerkin,theircurrentuseisinthesearchforavaccineagainstmalaria.ReadingPassage2IsThereAnybodyOutThere?TheSearchforExtra-terrestrialIntelligenceThequestionofwhetherwearealoneintheUniverseuni(一)+vers(轉(zhuǎn))+ehashauntedhunt-haunt;h(home)+aunt大姨媽來(lái)家里humanityhuman+i+ty.hum(潮濕/泥土/人)+anforcenturies,butwemaynowstandpoisedpoise=pois(懸放)+e。pend/pens/pent(懸)frompos(放)(懸著,平衡,泰然鎮(zhèn)定)onthebrinkoftheanswertothatquestion,aswesearchforradiosignalssign四個(gè)牛。sign(簽/標(biāo)注)+al(形綴/名綴)fromotherintelligentintelligent=inter(之間uni(一)+vers(轉(zhuǎn))+ehunt-haunt;h(home)+aunt大姨媽來(lái)家里human+i+ty.hum(潮濕/泥土/人)+anpoise=pois(懸放)+e。pend/pens/pent(懸)frompos(放)sign四個(gè)牛。sign(簽/標(biāo)注)+al(形綴/名綴)intelligent=inter(之間)+lig(leg/lect選)+ent。ent=ant,ence=ance,ency=ancy智能的civil(民事的,公民的。civilwar內(nèi)戰(zhàn))+iz(e)(動(dòng)綴)+a+tion。文明,文化acro(高/頂/首。雜技的代稱(chēng)acrobatics在高處行走)+nym(=name。anonymous匿名的)terrestrial=terra(地球,大地)+e+str(=st站立,佇立)+al地球的,陸地的inter(之間between)+mitt(=mit投射)+ent,間歇的,斷續(xù)的techn(=tech科技。hi-tech高科技)+o+logy(學(xué)問(wèn))??萍糰xx+tempt(得罪宙斯的國(guó)王,被宙斯困入水中,食物近在嘴邊,卻吃不到。努力爭(zhēng)取,嘗試)嘗試,試圖。temptation誘惑物,引誘。ATheprimaryreasonforthesearchisbasiccuriosity–thesamecuriosityaboutthenaturalworldthatdrivesallpurescience.WewanttoknowwhetherwearealoneintheUniverse.Wewanttoknowwhetherlifeevolvesnaturallyifgiventherightconditions,orwhetherthereissomethingveryspecialabouttheEarthtohavefosteredthevarietyoflifeformsthatweseearoundusontheplanet.Thesimpledetectionofaradiosignalwillbesufficienttoanswerthismostbasicofallquestions.Inthissense,SETIisanothercoginthemachineryofpuresciencewhichiscontinuallypushingoutthehorizonofourknowledge.However,thereareotherreasonsforbeinginterestedinwhetherlifeexistselsewhere.Forexample,wehavehadcivilizationonEarthforperhapsonlyafewthousandyears,andthethreatsofnuclearwarandpollutionoverthelastfewdecadeshavetoldusthatoursurvivalmaybetenuous.Willwelastanothertwothousandyearsorwillwewipeourselvesout?Sincethelifetimeofaplanetlikeoursisseveralbillionyears,wecanexpectthat,ifothercivilizationsdosurviveinourgalaxy,theirageswillrangefromzerotoseveralbillionyears.Thusanyothercivilizationthatwehearfromislikelytobefarolder,onaverage,thanourselves.Themereexistenceofsuchacivilizationwilltellusthattheoldercivilizationmaypassonthebenefitsoftheirexperienceindealingwiththreatstosurvivalsuchasnuclearwarandglobalpollution,andotherthreatsthat(yī)wehaven'tyetdiscovered.BIndiscussingwhetherwearealone,mostSETIscientistsadopttwogroundrules.First,UFOs(UnidentifiedFlyingObjects)aregenerallyignoredsincemostscientistsdon’tconsidertheevidenceforthemtobestrongenoughtobearseriousconsideration(althoughitisalsoimportanttokeepanopenmindincaseanyreallyconvincingevidenceemergesinthefuture).Second,wemakeaveryconservat(yī)iveassumptionthat(yī)wearelookingforalifeformthatisprettywelllikeus,sinceifitdiffersradicallyfromuswemaywellnotrecognizeitasalifeform,quiteapartfromwhetherweareabletocommunicatewithit.Inotherwords,thelifeformwearelookingformaywellhavetwogreenheadsandsevenfingers,butitwillneverthelessresembleusinthatitshouldcommunicatewithitsfellows,beinterestedintheUniverse,liveonaplanetorbitingastarlikeourSun,andperhapsmostrestrictively,haveachemistry,likeus,basedoncarbonandwater.CEverwhenwemaketheseassumptions,ourunderstandingofotherlifeformsisstillseverelylimited.Wedonotevenknow,forexample,howmanystarshaveplanets,andwecertainlydonotknowhowlikelyitisthatlifewillarisenaturally,giventherightconditions.However,whenwelookatthe100billionstarsinourgalaxy(theMilkyWay),and100billiongalaxiesintheobservableUniverse,itseemsinconceivablethatat(yī)leastoneoftheseplanetsdoesnothavealifeformonit;infact,thebesteducatedguesswecanmake,usingthelittlethatwedoknowabouttheconditionsforcarbon-basedlife,leadsustoestimatethat(yī)perhapsonein100,000starsmighthavealife-bearingplanetorbitingit.Thatmeansthatournearestneighboursareperhaps100lightyearsaway,whichisalmostnextdoorinastronomicalterms.DAnaliencivilizationcouldchoosemanydifferentwaysofsendinginformationacrossthegalaxy,butmanyofthesee(cuò)itherrequiretoomuchenergy,orelseareseverelyattenuatedwhiletraversingthevastdistancesacrossthegalaxy.Itturnsoutthat,foragivenamountoftransmittedpower,radiowavesinthefrequencyrange1000to3000MHztravelthegreatestdistance,andsoallsearchestodatehaveconcentratedonlookingforradiowavesinthisfrequencyrange.Sofartherehavebee(cuò)nanumberofsearchesbyvariousgroupsaroundtheworld,includingAustraliansearchesusingtheradiotelescopeatParkes,NewSouthWales.Untilnowtherehavenotbeenanydetectionsfromthefewhundredstarswhichhavebeensearched.Thescaleofthesearcheshasbeenincreaseddramaticallysince1992,whentheUSCongressvotedN(xiāo)ASA$10millionperyearfortenyearstoconductathoroughsearchforextra-terrestriallife.Muchofthemoneyinthisprojectisbeingspentondevelopingthespecialhardwareneededtosearchmanyfrequenciesat(yī)once.Theprojecthastwoparts.Onepartisatargetedsearchusingtheworld’slargestradiotelescopes,theAmerican-operatedtelescopeinArecibo,PuertoRicoandtheFrenchtelescopeinNancyinFrance.Thispartoftheprojectissearchingthenearest1000likelystarswithhighsensitivityforsignalsinthefrequencyrange1000to3000MHz.Theotherpartoftheprojectisanundirectedsearchwhichismonitoringallofspacewithalowersensitivity,usingthesmallerantennasofNASA’sDeepSpaceNetwork.EThereisconsiderabledebateoverhowweshouldreactifwedetectasignalfromanaliencivilization.Everybodyagree(cuò)sthatweshouldnotreplyimmediat(yī)ely.Quiteapartformtheimpracticalityofsendingareplyoversuchlargedistancesat(yī)shortnotice,itraisesahostofethicalquestionsthatwouldhavetobeaddressedbytheglobalcommunitybeforeanyreplycouldbesent.Wouldthehumanracefacethecultureshockiffacedwithasuperiorandmucholdercivilisaiton?Luckily,thereisnoturgencyaboutthis.Thestarsbeingsearchedarehundredsoflightyearsaway,soittakeshundredsofyearsfortheirsignaltoreachus,andafurtherfewhundredyearsforourreplytoreachthem.It’snotimportant,then,ifthere’sadelayofafewyears,ordecades,whilethehumanracedebatesthequestionofwhethertoreplay,andperhapscarefullydraftsareply.ReadingPassage3ThehistoryoftheTortoise RichardDawkins,TheGuardian,Saturday26February2023。InthesecondofthreeessayswrittenonarecentvisittotheGalápagosIslands,RichardDawkinsconsidersanotheroftheextraordinarycreaturesthathelpedinspireDarwin'stheo
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