小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com选择性必修第一册UNIT5WORKINGTHELANDⅠ.阅读理解TodayChinaistheworld’sbiggestconsumerofwheat.Butitwasn’talwaysthatway.WheatonlycametotheareanowknownasnorthernChinatowardtheendoftheNeolithic(新石器)period，some4，600yearsago.Initially，wheatdidn’tseemtobesodeliciousandhadbeentreatedasacropofdesperationratherthanacookingdelight.ThefirstfarmersofnorthernChinaprimarilygrewmillet(粟)，startingasearlyas11，500yearsago.BythetimeoftheTangDynasty，wheathadreplacedmillet，becomingamajorcrop.Butrelativelylittlewasknownaboutexactlywhythisshiftoccurred.Inanattempttotracktheanswer，Iaccumulatedacollectionofnearly1，200datapointscoveringmorethan50sitesfromthemid-Neolithic，about9，000yearsago，tothecollapseoftheEasternHanDynastyin220AD.Thesiteswereacross8modernprovinces，rangingfromGansuProvinceinthenorthwesttoShandongProvinceintheeast.Onepossibleexplanationisamajorclimateshift，calledtheHoloceneEvent3，whichhappened4，000to4，500yearsago.Atthattime，theclimatebecamecolderanddrieracrosscontinents，causingdamagetocropproduction.Ontopofthis，thelateNeolithicperiodwasalsoatimeofrapidpopulationgrowtharoundtheworld.Withanever-increasingpopulationandunsteadycropproduction，itisreasonabletoassumethatNeolithicfarmersinnorthernChinawerestruggling.Wheat，itturnsout，actuallyneedsmorewaterthanmillet，makingitseemapoorchoiceforadryperiodofhistory.Butimportantly，itcanbesowedaftermillethasbeenharvested.That，wethink，isthemostlikelyreasonwhythepeopleacrossnorthernChinastartedtogrowwheat.小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.comFrommoreextremeweathertochangingcoastlines，climatechangehasalwaysbroughtunexpectedandsometimesdramaticchangestosocieties.Inthisinstance，theconsequenceoftheHoloceneEvent3innorthernChinaproved，eventually，delicious.1.Whatcanwelearnaboutwheatfromthesecondparagraph?A.Itreplacedmilletforitsgreattaste.B.Itwasapoorchoiceatthebeginning.C.Itoutnumberedmillet4，600yearsago.D.ItwastheearliestcropgrowninChina.2.WhatdothefiguresinParagraph3show?A.Theauthorfoundtheexactanswer.B.Theauthordidworldwideresearch.C.Theauthortooktheresearchseriously.D.Theauthorwasgoodatcollectingdata.3.WhatwasprobablythemainreasonfornorthernersinChinatogrowwheat?A.Thewatersupplywasenoughthen.B.Theharvestofmilletwasnotsatisfying.C.Itadjustedtotheweatherconditionsbetter.D.Ithadanalternativesowingseasonwithmillet.4.Whichofthefollowingcanbethebesttitleforthetext?A.HowwasmilletintroducedtoChina?B.WhydidChinesefarmersswitchtowheat?C.WhydidChinabecomethebiggestwheatconsumer?D.HowwasChina’swheatgrowthaffectedbyclimatechange?Mostpeopledon’tthinkmuchaboutthefoodscrapstheythrowaway；however，researchersinTokyohavedevelopedanewmethodtoreducefoodwastebyrecyclingdiscardedfruitandvegetablescrapsintorobustconstructionmaterials.Worldwideindustrialandhouseholdfoodwasteamountstohundredsofbillionsof小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.com小学、初中、高中各种试卷真题知识归纳文案合同PPT等免费下载www.doc985.compoundsperyear，alargeproportionofwhichcomprisesedible(可食用的)scraps，likefruitandvegetablepeels.Thisunsustainablepracticeisbothcostlyandenvironmentall...