【Whenpeoplewanttoknowabouttheweather,theyusuallygototheirradios,TVs,newspapers,ortotheInternet.However,youcanalsofindmanyweathersignsamongwildlife,becauseoftheirhighlydevelopedsenses.Dropsinairpressure(压力)producea】

　　Whenpeoplewanttoknowabouttheweather,theyusuallygototheirradios,TVs,newspapers,ortotheInternet.However,youcanalsofindmanyweathersignsamongwildlife,becauseoftheirhighlydevelopedsenses.Dropsinairpressure(压力)produceaneffectonsmallanimalsinmanyways.Miceanddeeraregoodweatherindicators.Peoplewhospendalotoftimeoutdoorshaveobservedthat,beforeastorm,fieldmicecomeoutoftheirholesandrunaround.Deerleavehighgroundandcomedownfromthemountains.

　　Birdsareespeciallygoodweatherindicatorsbecausetheyalsoshowtheeffectofapressuredropinmanyways.Forexample,somebirdsbecomeirritable(急躁的)andquarrelsomeandwillfightoverapieceofbread.Otherbirdschirp(叽叽喳喳)andsingjustbeforeastorm.Itseemstheyknowtheywon'tgetanotherchanceforanhourortwo.Birdsalsoseeksafeplacesbeforeastorm.Youwillsometimesseebirdssettlingintreesorgatheringtogetheronawireclosetoabuilding.Pre-stormlowpressuremakestheairsothinthatbirdshavedifficultyflying.

　　Itisunusualtoseemanybirdsflyingoverheadinthesummertime,ratherthanduringtheperiodsinthespringorautumn.Watchforotherweathersignsifyouseethis.Iftheyflyinthewrongdirection,theymaybeflyingaheadofastorm.

　　Bypayingcloserattentiontosomeimportantsignsinnature,wecanbecomebetterpreparedforanykindofweather.

　　60.Theword"indicators"inparagraph1probablymeans________.

　　A.mapsB.servicesC.signsD.stations

　　61.Therewillbeastormifbirds_________.

　　A.makemorenoisethanusualB.flyindifferentdirections

　　C.comedownfromtall.treesD.shareapieceofbread

　　62.Howcanbirdssensethecomingofastorm?

　　A.Byfeelingadropinairtemperature.

　　B.Bynoticingthechangeofwinddirections.

　　C.Byfeelingadropinairpressure.

　　D.Bynoticingthemovementsofotheranimals.

　　63.Thebesttitleforthetextwouldbe_______.

　　A.SignsofaStormB.DropsinAirPressure

　　C.Animals'SharpSensesD.Nature'sWeatherSigns