中考英语复习：难度较大的阅读文章含答案五.doc

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1、第一篇“Salty”RicePlantBoostsHarvestsBritishscientistsarebreedinganewgenerationofriceplantsthatwillbeabletogrowinsoilcontainingsaltwater.Theirworkmayenableabandonedfarmstobecomeproductiveoncemore.TimFlowersandTonyYeo,fromSussexUniversity’sSchoolofBiologicalSciences,havespentseveralyears

2、researchinghowcrops,suchasrice,couldbemadetogrowinwaterthathasbecomesalty.Thepairhaverecentlybegunathree-yearprogramme，fundedbytheBiotechnologyandBiologicalSciencesResearchCouncil，toestablishwhichgenesenablesomeplantstosurvivesaltyconditions.Theaimistobreedthiscapabilityintocrops，st

3、artingwithrice.Itisestimatedthateachyearmorethan10mhectares（公顷）ofagriculturallandarelostbecausesaltgetsintothesoilandstunts（妨碍生长）plants.Theproblemiscausedbyseveralfactors.Inthetropics，mangroves（红树林）thatcreateswamps（沼泽）andtraditionallyformedbarrierstoseawaterhavebeencutdown.IntheMedi

4、terranean，aseriesofdroughtshavecausedthewatertabletodrop，allowingseawatertoseep（渗透）in.inLatinAmerica，irrigationoftencausesproblemswhenwaterisevaporated（蒸发）bytheheat，leavingsaltdepositsbehind.Excesssaltthenenterstheplantsandpreventsthemfunctioningnormally.Heavyconcentrationsofmineral

5、sintheplantsstopthemdrawingupthewatertheyneedtosurvive.Toovercometheseproblems，FlowersandYeodecidedtobreedriceplantsthattakeinverylittleslatandstorewhattheydoabsorbincellsthatdonotaffecttheplants‘growth.Theyhavestartedtobreedthesecharacteristicsintoanewricecrop，butitwilltakeabouteig

6、htharvestsbeforetheresultingseedsarereadytobeconsideredforcommercialuse.Oncethecharacteristicsforsurvivingsaltysoilareknown，FlowersandYeowilltrytobreedtheappropriategenesintoallmannersofcropsandplants.Landthathasbeenabandonedtonaturewillthenbeabletobloomagain，providingmuchneededfood

7、inthepoorercountriesoftheworld.31WhichofthefollowingstatementsaboutFlowersandYeoistrue？ATheyarestudentsatSussexUniversity.BTheyarericebreeders.CTheyarehusbandandwife.DTheyarecolleaguesataninstitutionofhigherlearning.32FlowersandYeohavestartedaprogrammeAtofindwaystopreventwaterpollut

8、ion.Btoidentifygene