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2、动物们的数字观虽然动物们并不能像人类一样精确地计算数字，但是最近一项研究表明，动物不仅具有理解数字的能力，而且，这一能力还对它们的日常生活有着巨大的影响。现在，我们就一起去发现这其中的奥秘吧！阅读短文并回答问题“Whileanimalscan’tpickoutprecisenumbers,theycanunderstandthatmoreismore.Interestingly,weknownowthatnumerical（数值的）competenceispresentonalmosteverybran
3、choftheanimaltreeoflife,”saysAndreasNieder,aneurobiologistfromtheUniversityofTuebingen.“Differentgroupsofanimalsobviouslydevelopedthistraitindependentlyfromothersandthatstronglyindicatesthatithastobeofadaptivevalue.”Honeybees,forinstance,canrememberthenumbero
4、flandmarkstheypasswhensearchingforfoodinordertofindtheirwaybacktothehive.Thelastcommonancestorbetweenhoneybeesandprimateslivedabout600millionyearsago.Butstill,theyevolvednumericalcompetencethat,inmanyrespects,iscomparabletovertebrate（脊椎动物的）numericalcompetence
5、.Also,forexample,malefrogssing“advertisement”callstoattractfemales.Thefemales,listeningforthecomplexityoftheircalls,choosethemalethatsingsthemostcalls.Wolvesaremorelikelytohuntsuccessfullyiftheyhavetherightnumberofwolvesintheirpackforthesizeoftheirprey（猎物）:Wi
6、thpreylikedeer,onlyaroundsixtoeightwolvesareneeded,whilehuntingwildoxrequiresapackofninetothirteen.Theirpreyalsousesthisconcepttoprotectthemselvesfrompredators—deertendtoliveinlargeherdstoreducethechanceofanyindividualbecomingprey.Soobviouslytheyareassessingt
7、henumberofindividualsintheirgroupsfortheireverydaylifesituations.Despitethesemanyexamplesofnumericalcompetenceinanimals,thissubjecthasnotgottenmanyfirst-handstudies.“Manyofthesebehavioralfindingsinthewildhaveusuallybeencollectedasby-productsoraccidentalfindin
8、gsofotherresearchquestions,”saysNieder.Hearguesthatmoreresearchneedstobedonetofullyunderstandthenumericalcompetence.1.Thephenomenonofanimalshavingtheirownnumericalcompetenceshowsthat.A.AllgroupsofanimalsarerelatedinsomewaysB.Numericalcompetencemusthaveasurviv
9、albenefitC.TheintelligenceofanimalsvarieswithdifferentenvironmentsD.Animals’numericalcompetenceisdeterminedbytheiradaptability2.Whatroledoesnumericalcompetenceplayinwolves’hunting?A.Itgiv
