北京市高考一轮专题训练推理判断题【北京】BTailSpinTwodolphinsracearoundinabigpoolintheOceanPark
ThesmallerdolphinGrace,shownoffafewofhertricks,turningaroundandwavinghellotothecrowd
Themostamazingthingabouther,however,isthatshe’sevenswimmingatall
Shedoesn’thaveatail
Gracelosthertailasababywhenshegotcaughtupinafishtrap
WhenthedolphinarrivedattheOceanParkinDecember2005,shewasfightingforherlife
“Isshegoingtomakeit
”Hertrainer,AbbeyStone,fearedtheworst
Gracedidmakeit---buthertaildidn’t
Sheendeduplosingherflukesandthelowerpartofherpeduncle
Overthepastsixyears,shehaslearnedtoswimwithouthertail
Dolphinsswimbymovingtheirflukesandpeduncleupanddown
Gracetaughtherselftomoveanotherway---likeafish
Shepushedherselfforwardthroughthewaterbymovingherpedunclesfromsidetoside
ThemovementputharmfulpressureonGrace’sbackbone
Soacompa