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小编给考生们带来了托福写作TPO47,希望可以帮助广大托福考生轻松备考托福。 托福TPO47综合写作: Reading Pterosaurswereanancientgroupofwingedreptilesthatlivedalongside thedinosaurs.Manypterosaurswereverylarge,someaslargeasagiraffeand withawingspanofover12meters.Paleontologistshavelongwonderedwhether largepterosaurswerecapableofpoweredflight(flyingbyflappingtheirwings) orwhethertheywereableonlytoglide.Severalargumentshavebeenmade againstpoweredflight. Doubterspointoutthatsincemodernreptilesarecold-blooded,ancient reptilessuchaspterosaurswereprobablycold-bloodedaswell.Cold-blooded animalstypicallyhaveaslowmetabolismandareunabletoproducealotof energy.Poweredflightisanactivityrequiringalotofenergy,whichiswhy allmodernvertebratesthatflyarewarm-blooded,notcold-blooded.Itseemed unlikelythatpterosaurswouldhavebeenabletogeneratetheenergyneededto fly. Second,thereisalimittotheweightofanimalsthatcanbekeptairborne bypoweredflight.Pterosaursthatwereaslargeasagiraffewereprobablyso heavythattheywouldnothavebeenabletoflaptheirwingsfastenoughtostay aloftforanylengthoftime. Third,allanimalswithpoweredflightareabletotakeofffromthe ground.Forexample,birdstakeoffbyjumpingfromtheirlegsorrunningto gainspeedandthenjumping.Butthesemethodswouldnothaveworkedforlarge pterosaurs.Largepterosaurswouldhaveneededbig,powerfulmusclesintheir backlegstolaunchthemselvesintotheair,andweknowfromfossilizedbones thattheirbacklegmusclesweretoosmallandweaktoallowthepterosaursto runfastenoughorjumphighenoughtolaunchthemselvesintotheair. Question:Summarizethepointsmadeinthelecture,beingsuretoexplain howtheycastdoubtonthespecificpointsmadeinthereadingpassage. 托福TPO47独立写作: Doyouagreeordisagreewiththefollowingstatement? Itisimportanttoknowabouteventshappeningaroundtheworld,evenifit isunlikelythattheywillaffectyourdailylife. Usespecificreasonsandexamplestosupportyouranswer.