【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

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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