howling is a behavior

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1、Howlingisabehavior　　Howlingisabehaviorcommonlyobservedamongawolfpack.Aspackanimals,wolvesworktogethertohuntandrelyonhowlingasanimportantmeansofcommunicationamongeachother.Therearedifferentexplanationsofawolf’showlanditappearsthattheremaybemoretodiscover.　　Onetheoryisthatwolveshowltob

2、ondbettertogether.It’salmostasifhowlingtogetherhelpsthepackstaytogether.Perhapssomethingsimilartopeoplefeelingasenseofinvolvementwitheachotherwhensingingasongtogether.Butthistheorymaybewrong,explainsFredH.Harington,aprofessorwhostudieswolfbehavior.　　Indeed,therehavebeentimeswhenwolve

3、shavebeenseenonemomenthowlinginachorus,andthenext,quarrelingamongeachother.Itappearsthatusuallythelowest-rankingmembersofthepackmayactuallybe“punished”forjoininginthechorusattimes.Soishowlingawaytostrengthenasocialbondorjustawaytoreconfirmstatusamongitsmembers?—Whydowolveshowlforsure

4、?　　Whatisclear,however,isthathowlingisoftenusedamongpackmatestolocateeachother.Huntinggroundsaredistantandithappensthatwolvesmayseparatefromoneanotherattimes.Whenthishappens,howlingappearstobeanexcellentmeansofgathering.　　Howling,interestingly,isacontagiousbehavior.Whenonewolfstartst

5、ohowl,verylikelyotherswillfollow.Thisisoftenseentooccurinthemorning,asifwolvesweredoingsomesortof“rollcall”wherewolvesallhowltogethertoreporttheirpresence.　　　　55.Whatthepossiblesimilaritybetweenwolves’howlingtogetherandhuman’ssinginginchorus?　　A.Theactofcallingeachother.　　B.thesenseo

6、faccomplishment.　　C.Theactofhuntingforsomething.　　D.Thesenseofbelongingtoagroup.　　56.WhydoesHarringtonthinkthe“socialbond”theorymaybewrong?　　A.Wolvesseparatefromeachotherafterhowling.　　B.Wolvestendtoprotecttheirhuntinggrounds.　　C.Wolvessometimeshavequarrelsafterhowlingtogether.　　D.Wo

7、lvesoflowrankareencouragedtojoininthechorus.　　57.Researchersaresurethatwolvesoftenhowlto________.　　A.showtheirranks　　B.findtheircompanions　　C.reportthemissingones　　D.expresstheirloneliness　　58.“Howling…isacontagiousbehavior”(inthelastparagraph)means________.　　A.howlingisasignalforhun

8、ting　　B.howl