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ID:47825834
大小:169.00 KB
页数:9页
时间:2019-11-18
《全国卷2019届高考英语一轮复习Unit2Healthyeating课时作业新人教版必修3 》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、Unit2HealthyeatingⅠ.阅读理解ABiologistRobertPitmanandhiscolleaguestrackedorcas,orkillerwhales,andhumpbackwhalesoffthecoastofWesternAustralia.Toresearchfurther,thescientistsattachedatrackertoafemaleorca,whichallowedthemtousesatellitestomonitorhermovements.Theyfollowedhe
2、rforsixdays.Duringthattime,theorcaattackedeightyounghumpbackwhales.Duringthesevenattacks,theorcakilledthehumpbackwhalecalf(幼兽)onthreeoccasions.Butthestorydoesn'tendthere.Humpbackwhalesthemselvesarepopularlythoughttobelargebutgenerally,passivecreatures.Pitman'sstudy
3、findingsmayletpeoplethinkotherwise.Whenchasedbyorcas,humpbackwhalesareknowntotrytooutswimorcas.Theyarethoughttodothisathighspeedsothattheorcascan'tkeepup.Onsomeoccasions,thehumpbackwhalessoughtoutprotection.Theyswamtoshallowwater,nearbyreefs,orevenundertheresearche
4、rs'boats.Thesewaysoftenreducedtheattack.Butatothertimes,thehumpbackwhalesdecidedtostayandfight.Astheorcasapproached,themotherhumpbackwouldsometimesmovehercalftoherside,orliftitoutofthewaterusingherheadorflippers.Shealsoblewhugebreathsofairtodisturbtheorcas,andlunge
5、dorchargedatthem,slashing(劈)andslappinghertailandflippers.Perhapsmostsurprisingly,humpbackwhalesalsohaveadult“escorts(护卫队)”thattrytoprotectcalvesthatarenottheirown,joiningthemotherindefendingthesmallerwhale.Theseescortwhaleseitherchargedattheorcas,orplacedthemselve
6、sbetweentheattackersandcalves,slashingtheirtailsandflippers.Despitetheeffortsofthemotherwhalesandescorts,theorcasweremoreoftenthannotsuccessfulintheirattacks.Butthepresenceoftheescortsdidreducehowmanytimesawhalecalfwaskilled.[语篇解读] 本文是一篇说明文,主要讲的是科学家使用科学仪器来观察杀人鲸是如何追
7、杀驼背鲸及后者是如何反击和保护幼小的驼背鲸的。1.What'sthepurposeofthescientists'furtherresearch?A.Tokeeparecordofwhales'livinghabits.B.Toobserveorcas'huntinghumpbackwhales.C.Toseewhatlifeordeathbattleswhalesmayface.D.Tofindoutthetechniquesorcasusewhenhunting.解析:细节理解题。根据文章第一段中的“Toresearch
8、further...tousesatellitestomonitorhermovements.Theyfollowedherforsixdays.Duringthattime,theorcaattackedeightyounghumpbackwhales...”可知,科学家进行进一步研究的
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