WhenLadyGagareleasesanewsingle,itquicklygoesaroundtheworld.Nowscientistshavediscoveredthesamethinghappenswiththesongsofanotherunusualandinterestingcreature–thehumpbackwhale.Themammalsbecomeinterestedinnewtunesjustlikepeopledo,andthemostpopularoriginalwhalesongsspreadgloballylikehitsingles.Thediscoveryhasastonishedexpertswhosayitisthefirsttimesuchalarge,“population-wideculturalexchange”hasbeenseenintheanimalkingdom.Malehumpbackwhalesarewell-knownfortheloud,longandcomplexsongstheymakeduringthematingseason.Scientistsareunsurewhythemalessing.Somebelieveitisawayofadvertisingthemselvestofemales,othersholdthatitallowsmigratingwhalestostayincontact.Eachsonglastsfor10to20minutesandthemalescansingcontinuouslyfor24hours.Atanyperiodoftime,allthemalesinapopulationsingthesamesong.Butastudy,publishedinthejournalCurrentBiology,showsthatthissongchangesovertimeandspreadsaroundtheoceans.Dr.EllenGarland,ofQueenslandUniversity,said:“Ourfindingsshowculturalexchangeonavastscale.Songsmovelikeculturalripplesfromonepopulationtoanother,causingallmalestochangetheirsongtoanewversion.”ResearchersrecordedsongsfromsixneighboringpopulationsofwhalesinthePacificoveradecade.Theyfoundthatnewversionsofthesongsappearovertimeandalwaysspreadfromwesttoeast.IttakesaroundtwoyearsforsongsthatappearinthewatersoffAustraliatobeheardinFrenchPolynesia.Dr.Garlandbelievesthatasmallnumberofwhalesmaymigratetootherpopulationscarryingthenewsongswiththem,orthattheyareheardbypassingwhales.Dr.Garlandsaid,“Wethinkthismalesearchforsongnoveltyisinthehopeofbeingthatlittlebitdifferentandperhapsmoreattractivetotheoppositesex.”3.Thediscoveryisveryastonishingtoexperts,becauseitrevealstheexistenceofculturalchange.
关于有限合伙企业的概念理解,下列说法正确的有()。
有限合伙企业,是指由有限合伙人和普通合伙人共同组成,普通合伙人对合伙企业债务承担无限连带责任,有限合伙人以其认缴的出资额为限对合伙企业债务承担责任的合伙组织。因为有限合伙企业是由有限合伙人和普通合伙人共同组成,所以有限合伙企业中至少应当有1...