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1、第一编专题一考点3面时巩GU6]（2018-天津，C）There"sanewfrontierin3Dprintingthat'sbeginningtocomeintofocus：food.Recentdevelopmenthasmadepossiblemachinesthatprint,cook,andservefoodsonamassscale・Andtheindustryisn，tstoppingthere・FoodproductionWitha3Dprinter,acookcanprintcomplicatedchocolatesculpturesandbeautifulpiec
2、esfordecorationonaweddingcake・Noteverybodycandothat—ittakesyearsofexperience,butaprintermakesiteasy・ArestaurantinSpainusesaFoodinitoure—createformsandpieces”offoodthatare"exactlythesame,vfreeingcookstocompleteothertasks・Inanotherrestaurant,allofthedishesanddessertsitservesare3D—printed,rathertha
3、nfarmtotable.Sustainability（可持续性）Theglobalpopulationisexpectedtogrowto9.6billionby2050,andsomeanalystsestimatethatfoodproductionwillneedtoberaisedby50percenttomaintaincurrentlevels.Sustainabilityisbecominganecessity.3Dfoodprintingcouldprobablycontributetothesolution.Someexpertsbelieveprinterscou
4、ldusehydrocolloids（水解胶体）fromplentifulrenewableslikealgae（藻类）andgrasstoreplacethefamiliaringredients（烹饪原料）•3Dprintingcanreducefueluseandemissions.Grocerystoresofthefuturemightstock"food”thatlastsyearsonend,freeingupshelfspaceandreducingtransportationandstoragerequirements.NutritionFuture3Dfoodpri
5、nterscouldmakeprocessedfoodhealthie匚HodLipson,aprofessoratColumbiaUniversity,said,uFoodprintingcouldallowconsumerstoprintfoodwithcustomizednutritionalcontent,likevitamins.Soinsteadofeatingapieceofyesterday'sbreadfromthesupermarket,you'deatsomethingbakedjustforyouondemand.”ChallengesDespiterecent
6、advancementsin3Dfoodprinting,theindustryhasmanychallengestoovercome・Currently,mostingredientsmustbechangedtoapaste（糊*犬物）beforeaprintercanusethem,andtheprintingprocessisquitetime—consuming,becauseingredientsinteractwitheachotherinverycomplexways.Ontopofthat,mostofthe3Dfoodprintersnowarerestricted
7、todryingredients,becausemeatandmilkproductsmayeasilygobad.Someexpertsareskepticalabout3Dfoodprinters,believingtheyarebettersuitedforfastfoodrestaurantsthanhomesandhigh—endrestaurants.文章大意：本文是一篇科普文章。它主要介绍了3D食物打印机的优点和缺点。OWhatb
