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时间:2019-10-29
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1、Ⅰ.阅读理解ABiologistRobertPitmanandhiscolleaguestrackedorcas,orkillerwhales,andhumpbackwhalesoffthecoastofWesternAustralia.Toresearchfurther,thescientistsattachedatrackertoafemaleorca,whichallowedthemtousesatellitestomonitorhermovements.Theyfollowedherforsixdays.Duringthattime,theorcaattac
2、kedeightyounghumpbackwhales.Duringthesevenattacks,theorcakilledthehumpbackwhalecalf(幼兽)onthreeoccasions.Butthestorydoesn'tendthere.Humpbackwhalesthemselvesarepopularlythoughttobelargebutgenerally,passivecreatures.Pitman'sstudyfindingsmayletpeoplethinkotherwise.Whenchasedbyorcas,humpbac
3、kwhalesareknowntotrytooutswimorcas.Theyarethoughttodothisathighspeedsothattheorcascan'tkeepup.Onsomeoccasions,thehumpbackwhalessoughtoutprotection.Theyswamtoshallowwater,nearbyreefs,orevenundertheresearchers'boats.Thesewaysoftenreducedtheattack.Butatothertimes,thehumpbackwhalesdecidedt
4、ostayandfight.Astheorcasapproached,themotherhumpbackwouldsometimesmovehercalftoherside,orliftitoutofthewaterusingherheadorflippers.Shealsoblewhugebreathsofairtodisturbtheorcas,andlungedorchargedatthem,slashing(劈)andslappinghertailandflippers.Perhapsmostsurprisingly,humpbackwhalesalsoha
5、veadult“escorts(护卫队)”thattrytoprotectcalvesthatarenottheirown,joiningthemotherindefendingthesmallerwhale.Theseescortwhaleseitherchargedattheorcas,orplacedthemselvesbetweentheattackersandcalves,slashingtheirtailsandflippers.Despitetheeffortsofthemotherwhalesandescorts,theorcasweremoreof
6、tenthannotsuccessfulintheirattacks.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'huntinghumpbackwh
7、ales.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的目的是观察杀人鲸追杀驼背鲸的活动.故
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