限时训练(十二)Ⅰ.阅读理解A话题：3D打印难度：★★ItalianbioengineerGiuseppeSciontifromSpanishstartupNovameathasinventedthe“world’sfirst”3D-printedmeat-freesteakmadefromvegetableproteins，whichmimics(模仿)thetextureofbeef.Veganingredientssuchasrice，peasandseaweed，whichprovidetheaminoacidsneededforahealthydiet，areturnedintoafoodpastethatis3D-printedtoformarawandsteak-likesubstance.Despiteanabundanceofmeat-freeproductsalreadyonthemarketthattastesimilartoanimalmeats，Sciontifoundthatthesearelimitedtoimitationburgers，ormeatballs.Inanefforttoreducetheimpactofanimalagricultureandtoimprovepeople’snutrition，theMilaneseresearchersetouttocreateaplant-basedalternativeto“fleshy”meatproducts.Bycombiningtissueengineeringandbio-printingwithmoderncookingmethods，hecreatedaveganproductthatboaststhesameconsistency，appearanceandnutritionalpropertiesasanimalmeatproducts.3Dprintingallowedthescientisttogeneratecomplexandmicro-structuredthree-dimensionalformsthatareimpossibletoachieveusingothertechniques.Syringes(注射器)containingthelight-coloredfoodpastewereplacedina3Dprinter，whichfollowedapre-setcodedesignedbySciontiusingcomputer-aideddesign(CAD)software，toprintoutthemixtureintheshapeofasmallsteakthatcanthenbecooked.Itdidnotincludeanycolourant(着色剂).Itwasalightbrowncolor，similartoordinarycookedmeat.Whiletherearesomecompaniesworkingonthecreationofartificialmeatfromanimalcellsculturedinthelabs，sometimesknownas“cleanmeat”，thiskindofmeattakesalongtimetomakeandisexpensive.Scionti’smethodallowshimtoprinta100-grampieceofsteakinaround30minutes.Inadditiontocreatinganethicalmeatalternative，Sciontidesignedthemeat-freesteaktohelpinreducinggreenhousegasemissionsfromlivestock，whichaccountfor14.5percentofthecurrenttotalman-madegreenhousegasemissions.“ThelatestreportsfromtheFoodandAgricultureOrganizationoftheUnitedNations(FAO)showthatthecurrentlarge-scalelivestockbreedingisnolongersustainableglobally，”heexplained.“Ifwecontinuewiththecurrentsystem，inthefuturetherewillbelittlechanceofhavingtheresourcestodistributefoodtoeveryone，”hecontinued.“Itisforthesereasonsthatfindinganotherwayofproducinghealthyandeconomicalfoodthatcontainsallthefundamentalnutrientswillhelpustobettermanageourplanet’sfoodresources.”1.Sciontiowedhissuccessto.A.theadequatesupplyofmeatproductsB.theapplicationofadvancedtechnologyC.thegreatdemandformeat-freeproductsD.thegeneralsupportfromallwalksoflife答案B解析推理判断题。根据第四段内容可知，Scionti认为自己之所以能够造出“素牛排”，是因为有了3D打印技术的支持。故选B。2.Comparedwith“cleanmeat”，whatistheadvantageofScionti’ssteak?A.Includinglittlecolourant.B.Providingmorenutrition.C.Consumingmuchlesstime.D.Causingnoharmtohumans.答案C解析细节理解题。根据第六段中“...sometimesknownas‘cleanmeat’，thiskindofmeattakesalongtimetomakeandisexpensive.Scionti’smethodallowshimtoprinta100-grampieceofsteakinaround30minutes.”可知，与利用动物细胞所造的“人造肉”相比，Scionti的“素牛排”耗时更少。故选C。3.WhatisoneofScionti’spurposesindesigningthemeat-freesteak?A.Topromotethe3Dprintingtechnology.B.Toavoidglobalfoodcrisisinthefuture.C.Toprovideaffordablefoodforpoorareas.D.Tomeetconsumers’requirementsformeat.答案B解析推理判断题。根据倒数第二段最后一句和最后一段可知，Scionti希望通过这种“造肉”的方式来避免未来世界可能会出现的食物危机。故选B。B话题：种植蔬菜难度：★★Ihavenev...
