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1、Unit3TheMillionPoundBankNote**阅读理解。Vinegarmakessalad,friesanddumplingstastebetter,andyoucanevenuseittocleanyourwindows.Andnow,accordingtoscientists,itmayeventheplanet’spopulationsurviveclimatechange.ResearchersfromtheRIKENCenterforSustainableResourceScience(CSRS)inJapa
2、nfoundthatgrowingplantsinvinegarmakesthemmoreresistanttodroughts.Thiscouldmeanthatinthefuture,worriesaboutclimatechangeaffectingtheworld’ssupplyoffoodwillbemuchlower.ThediscoverywasmadeaftertheresearchersstudiedtheArabidopsis,aplantknownforitsabilitytosurviveindryweath
3、er.Itwasfoundthatwhentheplantwasplacedindrought-likeconditions,itproducedachemicalcalledacetate（醋酸盐）—themaincomponentofvinegar.Afterdiscoveringthis,thescientistsexperimentedfurtherbyaddingacetatetothesoilofotherplants,beforetheystoppedgivingthemwatercompletely.Afterlea
4、vingtheplantsfor14days,theyfoundthattheonestreatedwithacetatehadsurvived,whiletheuntreatedplantshaddriedupanddied.It’shopedthatthissimplemethodofsurvivalcouldsoonbeusedtohelpfarmersindrycountrieskeeptheircropsalive."Intheexperiment,wetargetedthestaplefoodsoftheworld—ri
5、ce,wheatandmaize—andthebasicplantofbreedingspecies,rapeseed（油菜籽）,"JongMyongKim,co-authorofthestudy,toldPopularSciencemagazine.Kimalsotoldthemagazinehe’salreadybeenintouchwithpeopleallovertheworldwhoareinterestedintryingthissimpleandcost-effectivemethodoutforthemselvesf
6、romflowergrowingcompaniestoamateurgardeners.Althoughatthispointkeepingthirstyplantsaliveisn’taseasyasjustpouringvinegaroverthem,Kimsaidheandhisteamareworkingonmakingtheprocessassimpleaspossible."Nowwearetryingtocooperatewithsomefarmers,andalsosomecompanies,tomakeametho
7、dtoapplythissystem,"hesaid.Andforthoseofuswhoalwaysforgettoaskourneighborstowaterourplantswhenwegoaway,hopefullythismeanstheendofreturninghomefromatriptofindourfavoriteflowershavedied.1.Whatisthearticlemainlyabout?A.Theworld’sfoodsupplywillbeincreased.B.Plantsbettersur
8、vivedroughts.C.TheArabidopsisisresistanttodroughts.D.Vinegarcouldbeusedtofightdroughts.2.Itwasdiscoveredthatacetateca
