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时间:2020-06-26
《【人教版】2020届一轮优化探究英语练习 必修三 Unit 2 Healthy eating 含答案.doc》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、Ⅰ.阅读理解ABiologistRobertPitmanandhiscolleaguestrackedorcas,orkillerwhales,andhumpbackwhalesoffthecoastofWesternAustralia.Toresearchfurther,thescientistsattachedatrackertoafemaleorca,whichallowedthemtousesatellitestomonitorhermovements.Theyfollowedherforsixdays.Duringthattime,theorcaat
2、tackedeightyounghumpbackwhales.Duringthesevenattacks,theorcakilledthehumpbackwhalecalf(幼兽)onthreeoccasions.Butthestorydoesn'tendthere.Humpbackwhalesthemselvesarepopularlythoughttobelargebutgenerally,passivecreatures.Pitman'sstudyfindingsmayletpeoplethinkotherwise.Whenchasedbyorcas,h
3、umpbackwhalesareknowntotrytooutswimorcas.Theyarethoughttodothisathighspeedsothattheorcascan'tkeepup.Onsomeoccasions,thehumpbackwhalessoughtoutprotection.Theyswamtoshallowwater,nearbyreefs,orevenundertheresearchers'boats.Thesewaysoftenreducedtheattack.Butatothertimes,thehumpbackwhale
4、sdecidedtostayandfight.Astheorcasapproached,themotherhumpbackwouldsometimesmovehercalftoherside,orliftitoutofthewaterusingherheadorflippers.Shealsoblewhugebreathsofairtodisturbtheorcas,andlungedorchargedatthem,slashing(劈)andslappinghertailandflippers.Perhapsmostsurprisingly,humpback
5、whalesalsohaveadult“escorts(护卫队)”thattrytoprotectcalvesthatarenottheirown,joiningthemotherindefendingthesmallerwhale.Theseescortwhaleseitherchargedattheorcas,orplacedthemselvesbetweentheattackersandcalves,slashingtheirtailsandflippers.Despitetheeffortsofthemotherwhalesandescorts,the
6、orcasweremoreoftenthannotsuccessfulintheirattacks.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
7、'huntinghumpbackwhales.C.Toseewhatlifeordeathbattleswhalesmayface.D.Tofindoutthetechniquesorcasusewhenhunting.解析:细节理解题.根据文章第一段中的“Toresearchfurther...tousesatellitestomonitorhermovements.Theyfollowedherforsixdays.Duringthattime,theorcaattackedeightyounghumpbackwhales...”可知,科学家进行进一步研究
8、的目的是观察杀人鲸追杀驼背鲸的活动.故
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