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1、2023英语全国卷二完形填空翻译Homingpigeonsareplacedinatrainingprogramfromaboutthetimetheyaretwenty-eightdaysofage.Theyaretaughttoenterthecagethroughatrapandtoexerciseaboveandaroundtheloft(鸽棚),andgraduallytheyaretakenawayforshortdistancesinwillowbasketsandreleased.Theyarethenexpectedtofindtheirwayhomeintheshortes
2、tpossibletime.Intheirtrainingflightsorinactualraces,thebirdsaretakentoprearrangeddistantpointsandreleasedtofindtheirwaybacktotheirownlofts.Oncethebirdsareliberated,theirowners,whoarestandingbyatthehomelofts,anxiouslywatchtheskyforthereturnoftheirentries.Sincetimeisoftheessence,thespeedwithwhichthebi
3、rdscanbeinducedtoenterthelofttrapmaymakethedifferencebetweengainingawinorasecondplace.Somehomingpigeonexpertsclaimthatthisbirdisgiftedwithaformofbuilt-inradarthathelpsitfinditsownloftafterhoursofflight,forhiddenundertheheadfeathersaretwoverysensitiveears,whilethesharp,prominenteyescanseegreatdistanc
4、esindaytime.Whydohomingpigeonsflyhome?Theyarenotuniqueinthisinherentskill;itisfoundinmostmigratorybirds,inbees,ants,toads,andeventurtles,whichhavebeenknowntotravelhundredsofmilestoreturntotheirhomes.Butintheanimalworld,thehomingpigeonalonecanbetrustedwithitsfreedomandtrainedtocarryoutthemissionsthat
5、peopledemand.21.Thispassageismainlyabout_.A.homingpigeonsandtheirtrainingB.howtobuyahomingpigeonC.protectionofhomingpigeonsagainstthethreatofextinctionD.liberationofhomingpigeons22.Accordingtothepassage,whathappenstohomingpigeonswhentheyareaboutamonthold?A.Theyarekeptinatrap.B.Theyentertheirfirstrac
6、e.C.Theybeginatrainingprogram.D.Theygettheirwingsclippedandmarked.23.Accordingtothepassage,thedifferencebetweenahomingpigeonandanordinaryoneis_.A.thespanofthewingsB.theshapeoftheeyesC.thetextureofthefeathersD.thesizeofthebrain24.TheauthormentionsallofthefollowingattributesthatenableahomingpigeontoreturnhomeEXCEPT_.A.instinctB.airsacsC.sensitiveearsD.goodeyes25.Whydoestheauthormentionbees,ants,toads,andturtlesinthelastparagraph?