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六级阅读第二十九天(提高卷)完整版

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Passage★★★☆☆

Questions1to5arebasedonthefollowingpassage.

Scatteredthroughtheseasoftheworldarebillionsoftonsofsmallplantsandanimalscalledplankton.Mostoftheseplantsandanimalsaretoosmallforthehumaneyetosee.Theydriftaboutlazilywiththecurrents,providingabasicfoodformanylargeranimals.Planktonhasbeendescribedastheequivalentofthegrassesthatgrowonthedrylandcontinents,andthecomparisonisanappropriateone.Inpotentialfoodvaluehowever,planktonfaroutweighsthatofthelandgrasses.Onescientisthasestimatedthatwhilegrassesoftheworldproduceabout49billiontonsofvaluablecarbohydrateseachyear.Thesea’splanktongeneratesmorethantwiceasmuch.

Despiteitsenormousfoodpotential,littleeffortwasmadeuntilrecentlytofarmplanktonaswefarmgrassesonland.Nowmarinescientistshaveatlastbeguntostudythispossibility,especiallyasthesea’sresourcesloomevenmoreimportantasameansoffeedinganexpandingworldpopulation.Nooneyethasseriouslysuggestedthat“planktonburgers”maysoonbecomepopulararoundtheworld.Asapossiblefarmedsupplementaryfoodsource,however,planktonisgainingconsiderableinterestamongmarinescientists.

Onetypeofplanktonthatseemstohavegreatharvestpossibilitiesisatinyshrimplikecreaturecalledkrill.Growingtotwoorthreeincheslong,krill

providethemajorfoodforthegiantbluewhale,thelargestanimalevertoinhabittheEarth.Realizingthatthiswhalemaygrow100feetandweigh150tonsatmaturity,itisnotsurprisingthateachonedevoursmorethanonetonofkrilldaily.

Krillswimaboutjustbelowthesurfaceinhugeschoolssometimesmileswide,mainlyinthecoldAntarctic.Becauseoftheirpinkcolor,theyoftenappearasasolidreddishmasswhenviewedfromashiporfromtheair.Krillareveryhighinfoodvalue.Apoundofthesecrustaceanscontainsabout460calories—aboutthesameasshrimporlobster,towhichtheyarerelated.

Ifthekrillcanfeedsuchhugecreaturesaswhales,manyscientistsreason,theymustcertainlybecontendersasnewfoodsourceforhumans.1.Whichofthefollowingbestportraystheorganizationofthepassage?[A].Theauthorpresentstheadvantagesanddisadvantagesofplanktonasafoodsource.

[B].Theauthorquotespublicopiniontosupporttheargumentforfarmingplankton.

[C].Theauthorclassifiesthedifferentfoodsourcesaccordingtoamountofcarbohydrate.

[D].Theauthormakesageneralstatementaboutplanktonasafoodsourceandthenmovestoaspecificexample.

2.Accordingtothepassage,whyisplanktonregardedtobemorevaluablethanlandgrasses?[A].Itiseasiertocultivate.

[B].Itproducesmorecarbohydrates.[C].Itdoesnotrequiresoil.[D].Itismorepalatable.

3.Whydoestheauthormention“planktonburgers”?[A].Todescribetheappearanceofonetypeofplankton.[B].Toillustratehowmuchplanktonawhaleconsumes.[C].Tosuggestplanktonasapossiblefoodsources.[D].Tocomparethefoodvaluesofbeefandplankton.4.Whatismentionedasoneconspicuousfeatureofkrill?[A].Theyarethesmallestmarineanimals.[B].Theyarepinkincolor.

[C].Theyaresimilarinsizetolobsters.[D].Theyhavegrasslikebodies.

5.Theauthormentionsallofthefollowingasreasonswhyplankton

couldbeconsideredahumanfoodsourceexceptthatitis___.[A].highinfoodvalue.

[B].inabundantsupplyintheoceans.[C].anappropriatefoodforotheranimals.[D].freeofchemicalsandpollutants.

每日一句(DailySentence)

Thedifferenceinwinningandlosingismostoften...notquitting.

——WalterEliasDisney

赢与输的差别通常是--不放弃。

——华特·迪士尼

Words

1.scatter:['skætə(r)]vt.(使)散开,(使)分散,驱散2.sontinent:[ˈkɒntɪnənt]n.大陆,陆地3.comparison:[kəmˈpærɪsn]n.比较,对照

4.supplementary:[ˌsʌplɪˈmentri]adj.增补的,追加的5.maturity:[mə'tʃʊərətɪ]n.成熟,完备

6.devour:[dɪ'vaʊə(r)]vt.狼吞虎咽地吃光,吞没,毁灭7.solid:['sɒlɪd]adj.固体的,实心的,结实的,可靠的8.contender:[kənˈtendə(r)]n.(冠军)争夺者,竞争者

9.conspicuous:[kənˈspɪkjuəs]adj.明显的,显而易见的,惹人注意的10.cultivate:['kʌltɪveɪt]vt.耕作,种植,教养,栽培

11.palatable:[ˈpælətəbl]adj.可口的,美味的,愉快的,鲜美可口

12.illustrate:['ɪləstreɪt]vt.说明,表明,给…加插图13.shrimp:[ʃrɪmp]n.虾,小虾,矮小的人14.lobster:['lɒbstə(r)]n.龙虾,龙虾肉

题目解析

1.选[D]。题目问文章的结构是啥?就全文来看,作者首先说了浮游生物,说它营养价值蛮高的,是许多大型动物的食物,而后作者有具体举了一个例子,krill的例子,具体阐述一下浮游生物作为食物的优势。所以根据选项来看,答案应该选D。

2.选[B]。题目问根据文章,浮游生物为什么比陆地上的草更有价值呢?本题定位到原文第一段最后两句话。就潜在的食物价值来说浮游生物要比牧草大得多,它所提供的碳水化合物是牧草的两倍。所以,浮游生物更有价值的原因就在它能提供更多的营养(碳水化合物)。A.它更易于养殖,D.它更好吃,这两个原因原文都没有提到,C.它不需要土地。这的确是个原因,但不是主要原因的。3.选[C]。题目问作者为什么要提及planktonburgers这个词呢?Planktonburgers是合成词,翻译过来就是浮游生物汉堡,在第三段,作者说谁也没想到planktonburgers会这么流行的,流行的原因就是因为它能提供很大的营养,而且一些海洋科学家也开始对其进行研究了。所以作者这么说就是要强调它的食物价值。答案应该选C。其他选项说的都有点跑偏了~~

4.选[B]。题目问krill的最显著的特点是啥?本题要定位到原文的第四段和第五

段。这两段都是在讨论krill的,krill是一种浮游生物,体型很小,跟小虾(shrimp)片暗红色的东西(难道是赤潮??),但是提的营养价值却和小虾或者龙虾(lobster)一样,很丰富的哦~。题目问它的显著特点,我们从选项一个一个来看。A.他们是最小的海洋生物,这个一定不是啦(就不解释啦~);C.他们和龙虾一样大,这个原文没有说,原文说的是他们和小虾体型相似,再说,龙虾好大的呀,要是有那么大的浮游生物不得吓死人啊!D.他们有牧草一样的体型。这个原文真没有。只有B.他们是粉色滴~~

5.选[D]。题目问下列选项中哪个不是把浮游生物作为人来食物来源的原因?文章列举了好多浮游生物的好处,作者也在一步一步的暗示浮游生会成为人类食物的来源,所以,我们只要找出选项中哪个不是浮游生物作为食物来源的有点就可以啦(要以原文为依据哦!)。A.很高的营养价值,B.海洋里有充足的供应源,C.也是其他动物的食物来源,。这几个选项都在原文可以找到,也是浮游生物的优点,但是D.没有化学药物和污染,这个原文可没有提到啊!

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