（全国通用）2017高考英语一轮复习 考点规范练33 unit 3 under the sea 新人教版选修7

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1、考点规范练33(选修7　Unit3)Ⅰ.阅读理解Anewsystemhasbeendevelopedtomeasurethehealthoftheworld’soceans.Scientistssaythesystemwillchangethewaywethinkaboutoceansandhowtheyaffectourlives.ItiscalledtheOceanHealthIndex.Theindexisdesignedtotellifanythingiswrongwiththeoceansand,ifso,whatcanbedoneaboutit.Wh

2、etheryouliveintheUnitedStatesorinthemiddleofAfrica,youshouldcareaboutwhathappenstotheoceans.Mostoftheoxygenthatyoubreathecomesfromtheocean.Theoceansaretheprimaryclimateadaptationsystem.Theyabsorbcarbon.IfyouwanttoknowwhattheEarthwouldbelikewithoutanoceanyou’vegotplentyofexamplesinour

3、solarsystem—allthosehot,dusty,dry,coldinhospitable(荒凉的)placesarebasicallythatwaybecausetheydonothavealiquidoceantoprovideallthesebenefits,includingfood.Oneoutoffourpeopleontheplanetgettheirdailysourceofproteinfromtheocean.TheOceanHealthIndexusestwohundredseparatemeasurements.Onceayea

4、r,scientistswilluseittoannouncewhethertheoceanssuccessfullypassedthetest.Peoplehavelookedtonatureformedicinessinceancienttimes.Andmodernscientistshavesearchedtheworld’srainforestsfornewmedicines.Buttheoceanmaybeanevenbettersource.Atleasttwenty-sixdrugsthatcomefromseaorganisms(有机体)are

5、currentlybeingusedordeveloped.Andanewgenerationofchemistshopestoincreasethatnumber.Manydrugsareindevelopment,andtherewillbemanydiscoveriesofocean-basedmedicines.Asmallblood-suckingcreaturehasbeendiscoveredintheCaribbeanwatersofftheVirginIslands.Thecreaturemayhelpincreasescientists’un

6、derstandingofhowdiseaseispassedamongmarineanimals.Thisdiscoverywillleadtomoreinformationaboutparasites(寄生生物)andtheeffecttheycanhaveonmarineenvironments.1.Thepurposeofthetextisto　　　. A.introduceascientificsystemtomonitortheoceanB.talkaboutthecharacteroftheoceanC.presenttheimportanceof

7、theoceanD.introducearichsourcefornewmedicines2.TheOceanHealthIndexcanbedescribedas　　　. A.aprotectoroftheoceanB.theocean’sdoctorC.anobserveroftheoceanD.theocean’smirror3.Wecaninferfromthetextthat　　　. A.theworld’srainforestsarenotgoodplacesfornewmedicinesB.moremedicinesaremadefromtheoc

8、eanthanfromr