Wheredoesthemeatonourtablecomefrom? Itusuallycomesfromlivestocklikechickensandcows.Butdidyouknowthatmeatcanalsobemadeinalab？
UScompanyJUSThasannouncedthatlabgrownmeatcouldbeonsome，
restaurantmenusintheUnitedStatesandAsiabytheendof2018，TheIndependentreported.
“Thesemeatsincludechickennuggets(鸡块)，sausageandfoiegras(鹅肝酱)，”JoshTetrick，CEOofJUST，toldTheIndependent.Labmeatissometimesreferredtoas
“cleanmeat”．Itismadeusingthestemcells(干细胞)
oflivinglivestock.Thecellsneedtobegrowninalabforafewweeks.Forexample，
makingahamburgerpatty(肉饼) takesaboutnineweeks，
CNNreported.Thisisfasterthanraisingacow，whichusuallytakesover20weeks.
Thefirstcleanmeatwasabeefburgerthatwasproducedin2013，
butitwassaidtotastequitedry.Howdoescleanmeattastenow? CleanmeatsupporterstoldCNNthattheythinkittastesjustliketraditionalmeat.
Cleanmeathasotheradvantages.Itishealthierthantraditionalmeat.Meatproducerscancontrolwhattypeoffatsgoesintothemeat.Theycanproducecleanmeatthatcontainshealthyfats，suchasomega
3fattyacids(脂肪酸)．Thiskindoffatisgoodforpeople’shearts.
Cleanmeatcanalsohelptosolveglobalwarming.AccordingtoTheWashingtonPost，
about14.5percentoftheplanet’sgreenhousegasemissions(排放)
comefromraisinglivestock.That’smorethantheemissionsfromeverycar，train，
shipandairplaneintheworldcombined.Itispredictedthatswitchingtocleanmeatcouldlowergreenhousegasemissionsby96percent，TheIndependentreported.
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语篇解读 本文是一篇科普说明文。美国JUST公司曾宣布，到2018年底，在美国和亚洲的一些餐厅菜单上可能会出现人造肉。人造肉的口感与传统肉无异，此外，人造肉比传统肉更健康、更环保。
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1．Wheremaythemeatweeatcomefrominfuture?
A．Companies. B．Greenhouses.
C．Labs. D．Restaurants.
答案 C
解析 细节理解题。根据第一段第三句“Butdidyouknowthatmeatcanalsobemadeinalab？”可知，在未来肉可能是在实验室里做成的，故C项正确。
2．Whatcanbeusedtomake“cleanmeat”？
A．Stemcells. B．Fattyacids.
C．Hamburgerpatties. D．Chickennuggets.
答案 A
解析 细节理解题。根据第二段第三句“Itismadeusingthestemcells(干细胞) oflivinglivestock.”可知，这种肉是利用活的家畜的干细胞做成的，故A项正确。
3．Whatistheadvantageofcleanmeat?
A．Itisfatty. B．Itishealthy.
C．Itisfree. D．Itissmelly.
答案 B
解析 细节理解题。根据第四段第二句“Itishealthierthantraditionalmeat.”可知，这种人造肉比传统肉更健康，故B项正确。
4．Whatdoweknowaboutcleanmeatfromthelastparagraph?
A．Itcomesfromlivestock.
B．Itcanbeswitchedoff.
C．Itresultsinglobalwarming.
D．Itbenefitstheenvironment.
答案 D
解析 推理判断题。根据最后一段第一句“Cleanmeatcanalsohelptosolveglobalwarming.”可知，这种人造肉还可以帮助解决全球变暖问题。由此可以推断，这种人造肉有利于环境保护，故D项正确。
