欢迎来到天天文库
浏览记录
ID:29063260
大小:111.00 KB
页数:4页
时间:2018-12-16
《2018年高考英语一轮复习 unit 5 the power of nature考点规范练 新人教版选修6》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、Unit5ThepowerofnatureⅠ.阅读理解(2016·合肥第一次质检)ABluewhalesarethelargestanimalseverknowntohaveexistedontheplanet,andtheycangrowtoalengthof100feetandweighmorethan330,000pounds.ButrecentlyresearchershavefoundthatthesewhalesareonthemoveandtheyhavemigratedfromCaliforniawaterstoareas
2、offCanadaandAlaskaforthefirsttimesincecommercialwhalingendedin1965.Theresearchersidentified15bluewhalesthathaveappearedoffthecoastofBritishColumbiaandtheGulfofAlaskasince1997.FourofthesewhaleswererecognizedasonesthatwereoncesightedoffCaliforniashores,suggestingthatthewhal
3、esarereturningtoanoldmigrationpatternbetweenthecoasts.Beforecommercialwhalingbeganintheearly1900s,bluewhaleswerefoundwidelythroughouttheNorthPacificandCaliforniawaters.Butfromthe1920stothe1960s,whalingseverelyreducedthewhalepopulations.BluewhalesneverrecoveredintheNorthPa
4、cific,makingsightingsinthisarearare.However,muchlargergroupsofwhaleshavebeenobservedclosetoCaliforniasincethe1970s.ThescientistshadpreviouslythoughtthattheCaliforniapopulationwasseparatefromthepopulationthathadhistoricallylivedintheNorthPacificwaters.Butthecurrentstudysho
5、wsthatwhalesoffthecoastofBritishColumbiaandtheGulfofAlaskaarelikelypartoftheCaliforniapopulation.Toidentifythebluewhales,theresearcherslookedatphotosofcetaceanstakenintheNorthPacificOceanandcomparedthemwithalibraryofbluewhalepicturestakenalongthewestcoastoftheUnitedStates
6、andSouthernPacific.Uptonow,theresearchersarenotquitesurewhythewhalesarechangingtheirmigrationpatterns,buttheysuspectthatthewhalesmaybefollowingtheirfoodmovingfarthernorthbythechangesinoceanconditions.1.Accordingtothepassage,bluewhalesare . A.followingafixedrouteofmigrat
7、ionB.dyingoutduetocommercialwhalingC.movingfromthesouthtothenorthD.rarelyfoundintheSouthernPacific2.ThewhalepopulationintheNorthPacific . A.isdifferentfromtheCaliforniapopulationB.isprobablypartoftheCaliforniapopulationC.hasbecomethelargestgroupsincethe1970sD.haslivedth
8、eresincethe1960s3.Theunderlinedword“cetaceans”inParagraph5probablymeans . A.landcreaturesB.wha
此文档下载收益归作者所有