十一、主旨大意——标题归纳题(2018·6月天津，C)There’sanewfrontierin3Dprintingthat’sbeginningtocomeintofocus：food.Recentdevelopmenthasmadepossiblemachinesthatprint，cook，andservefoodsonamassscale.Andtheindustryisn’tstoppingthere.FoodproductionWitha3Dprinter，acookcanprintcomplicatedchocolatesculpturesandbeautifulpiecesfordecorationonaweddingcake.Noteverybodycandothat—ittakesyearsofexperience，butaprintermakesiteasy.ArestaurantinSpainusesaFoodinito“re-createformsandpieces”offoodthatare“exactlythesame，”freeingcookstocompleteothertasks.Inanotherrestaurant，allofthedishesanddessertsitservesare3D-printed，ratherthanfarmtotable.Sustainability(可持续性)Theglobalpopulationisexpectedtogrowto9.6billionby2050，andsomeanalystsestimatethatfoodproductionwillneedtoberaisedby50percenttomaintaincurrentlevels.Sustainabilityisbecominganecessity.3Dfoodprintingcouldprobablycontributetothesolution.Someexpertsbelieveprinterscouldusehydrocolloids(水解胶体)fromplentifulrenewableslikealgae(藻类)andgrasstoreplacethefamiliaringredients(烹饪原料).3Dprintingcanreducefueluseandemissions.Grocerystoresofthefuturemightstock“food”thatlastsyearsonend，freeingupshelfspaceandreducingtransportationandstoragerequirements.NutritionFuture3Dfoodprinterscouldmakeprocessedfoodhealthier.HodLipson，aprofessoratColumbiaUniversity，said，“Foodprintingcouldallowconsumerstoprintfoodwithcustomizednutritionalcontent，likevitamins.Soinsteadofeatingapieceofyesterday’sbreadfromthesupermarket，you’deatsomethingbakedjustforyouondemand.”ChallengesDespiterecentadvancementsin3Dfoodprinting，theindustryhasmanychallengestoovercome.Currently，mostingredientsmustbechangedtoapaste(糊状物)beforeaprintercanusethem，andtheprintingprocessisquitetime-consuming，becauseingredientsinteractwitheachotherinverycomplexways.Ontopofthat，mostofthe3Dfoodprintersnowarerestrictedtodryingredients，becausemeatandmilkproductsmayeasilygobad.Someexpertsareskepticalabout3Dfoodprinters，believingtheyarebettersuitedforfastfoodrestaurantsthanhomesandhigh-endrestaurants.46.Whatbenefitdoes3Dprintingbringtofoodproduction?A.Ithelpscookstocreatenewdishes.B.Itsavestimeandeffortincooking.C.Itimprovesthecookingconditions.D.Itcontributestorestaurantdecorations.答案B解析推理判断题。根据Foodproduction下的第二句中的“...ittakesyearsofexperience，butaprintermakesiteasy.”可知，利用3D打印机打印食物省时省力。故答案为B。47.Whatcanwelearnabout3DfoodprintingfromParagraph3?A.Itsolvesfoodshortageseasily.B.Itquickensthetransportationoffood.C.Itneedsnospaceforthestorageoffood.D.Itusesrenewablematerialsassourcesoffood.答案D解析推理判断题。根据第三段中的“Someexpertsbelieveprinterscouldusehydrocolloids(水解胶体)fromplentifulrenewableslikealgae(藻类)andgrasstoreplacethefamiliaringredients(烹饪原料).”可知，3D打印机用的是可再生材料。故D项正确。48.AccordingtoParagraph4,3D-printedfood.A.ismoreavailabletoconsumersB.canmeetindividualnutritionalneedsC.ismoretastythanfoodinsupermarketsD.cankeepallthenutritioninrawmaterials答案B解析推理判断题。根据第四段中的“Foodprintingcouldallowconsumerstoprintfoodwithcustomizednutritionalcontent，likevitamins.”可知，3D打印机打印食物可以满足个人的营养需求。故答案为B。49.Whatisthemainfactorthatprevents3Dfoodprintingfromspreadingwidely?A.Theprintingprocessiscomplicated.B.3Dfoodprintersaretooexpensive.C.Foodmaterialshavetobedry.D.Someexperts...
