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2020-2021学年韶关市始兴县风度中学高三英语下学期期中考试试题及答案解析
第一部分阅读（共两节，满分40分）
第一节（共15小题；每小题2分，满分30分）
阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项
A
Amidthecoronavirusoutbreak,theU.S.DepartmentofHomelandSecurityrecommendshavingatleastatwo-weeksupplyofwaterandfood.
Potatoes
Shelflife：2to5weeksifstoredinacool,dry,darkplace
YukonGold,red,andfingerlingpotatoeswilllastfromtwotothreeweeks.Largerwhitepotatoescanlastforthreetofiveweeks.Sweetpotatoeshaveaboutthesameshelflife.Don'tstorethemnexttoonions,however.Thetwomightgotogetherwellincooking,butraw,eachgivesoffgasesandmoisturethatmightcausetheothertospoilfaster.
Tea
※Shelflife：6to12monthspast"sell-by"date
Driedtealeaves,whetherloose(inasealedcontainerorinteabags(inanunopenedboxcaneasilylastayearormoreifthey'renotsubjectedtodamporhumidity.However,theteadoestendtoloseflavorovertime.
Peanuts
●Shelflife：1to2months
Peanutsintheirshell,especiallywhenkeptcoolanddry,areperfectlyhappyinthecupboardforaslongastwomonths.
Cannedfruitsandvegetables
●Shelflife：1to2yearspast"sell-by”date
Canningisanextremelyefficientmeansofpreservingfood.Generallyspeaking,ifcannedfoodsaren'tsubjectedtoextremeheat,theircontentsshouldstaygoodfortwoyearsormore.Beaware,however,ofdentedcansorthosewithswollentops,whichmayindicatethepresenceofbacteriainside.1.Whichcangobadfasterifstoredwithonions?A.Potatoes.B.Tea.
C.Peanuts.D.Cannedfruitsandvegetables.

2.Whatisspecialabouttea?
A.Theflavorofteacanalwaysremainthesame.B.Tealeavesarebettertobepreservedinanopenjar.C.Tealeavesshouldbekeptawayfromthestateofbeingwet.D.Themaximumlengthoftimethatteacanbestoredis6months.3.Whatmayshortenthe"sell-by”dateofcannedfoods?A.Shapesofcans.B.Categoriesoffoods.
C.Declineofthetemperature.D.Exposuretohightemperature.
B
Contrarytothelong-heldbeliefthatplantsinthenaturalworldarealwaysincompetition,newresearchhasfoundthatinsevereenvironmentsadultplantshelpsmalleronesandgrowwellasaresult.
Theresearch,ledbyDrRocio,studiedadultandseedling(幼苗plantsintheecologicaldesertinthesouth-eastofSpain.DrRociosaid,“Ifyou'reaseedlinginapoorland—thetopofamountainorasandhill,forexample-andyou’reluckyenoughtoendupunderneathabigplant,yourchancesofsurvivalarecertainlybetterthanifyoulandedsomewhereonyourown.Whatwehavefound,whichwassurprising,isanestablishedlargeplant,calleda‘nurse’,protectsaseedling;italsoproducesmoreflowersthanthesameplantsofsimilarlargesizegrowingontheirown.”
Otherbenefitsofnurse-seedlingpartnershipsincludethatmorevarietyofplantsgrowingtogethercanhaveapositiveeffectontheenvironment.Forexample,vegetationareaswithnurseplantswithmoreflowersmightbeabletoattracthighernumbersofpollinators(传粉者inanarea,inturnsupportinginsectandsoillifeandevenprovideagreaterrangeofdifferentfruittypesforbirdsandotheranimals.
“Thebiggestwinnerforthissystemofnursingaplantisbiodiversity(生物多样性,”DrRociosaid.“Themorebiodiverseanarea,thegreaternumberofspeciesofplants,insectlife,mammalsandbirds,andthebetterthechancesoflong-termhealthyfunctioningoftheenvironmentandecosystems.”Thissystemiswin-winforadultandseedlingplantsinunfavorableenvironments.
Theresearchisofvaluetothosewhomanageandprotectplantsintoughenvironments.Mosthomegardenersandfarmersplantoensuretheirsoilandconditionsarethebesttheycanbeforplantgrowth,butthefindingsmightbeofvaluetothosewhogardeninbareplaces.4.Whatisacommonunderstandingofplants?
A.Theycanhelpeachother.B.Theycansurviveillconditions.

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