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【英语阅读理解IFyoudonotwantpeopletoknowhowmuchyoudrink,beware.Asurgeofnewtestsonblood,urineandhaircanrevealhowmuchsomeonehasdrunknotonlyinthepastdays,butinthepastweeksandmonths.Airlinescoulduseahairtest】
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更新时间:2024-03-29 05:37:39
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英语阅读理解

IFyoudonotwantpeopletoknowhowmuchyoudrink,beware.Asurgeofnewtestsonblood,urineandhaircanrevealhowmuchsomeonehasdrunknotonlyinthepastdays,butinthepastweeksandmonths.Airlinescoulduseahairtesttoinstillsafetybyidentifyingpilotswhoareheavydrinkers.Aurinetestmightallowpolicetoprovethatsomeonehadbeendrinkingwellafteranaccidenthashappened.Usedtogether,thesetoftestscouldprovideacomprehensivepictureofsomeone'sdrinkinghabits,saysFriedrichWurstoftheUniversityofBaselinSwitzerland.Wurstisheadofamultinationalteamdevelopingthetests.Alcoholitselfvanishesfromthebodywithinhours.Afterthispoint,thereareanumberofexistingmethodsoftellingwhethersomeonehasbeendrinking,butalmostallofthemrelyonindirectevidence,suchaslevelsofliverenzymes(酶)intheblood.Andnoneofthesetestsisfullyreliable.Inthepastdecade,however,variousgroupsworldwidehavebeenstudyingproductsuniquetoalcohol.Oneoftheseindicators,ethylglucuronide(EtG),startsaccumulatinginbloodasalcohollevelsdecline.Itlastsforuptofivedaysinurine,andconfirmsthatsomeonehashadadrinkinthattime.Anothertestlooksforphosphatidylethanol(PEth).PEthlastsforuptothreeweeksinthebloodofpeoplewhoconsumemorethantheequivalenttothreebeersaday.Wurst'steamhasshownitisafarmorereliableindicatorthanliver

enzymes."Wefoundnofalsenegatives,"hesays.Lookingatthecombinedlevelsoffourfattyacidethylesters(FAEEs)inhairprovidesanevenlongermeasurementofalcoholconsumption.FAEEsappearinbloodwithin12to18hoursofalcoholbeingconsumed,andendupbeingstoredinhair.Inthelateststudy,Wurst'steammonitoredaround40drinkers,andshowedthatFAEElevelsinhaircandistinguishbetweenlightandheavydrinkers."Theonlywaytoremovetheevidenceistoshaveoffallbodyhair,"saysWurst.

6.Whatisthepassagemainlyabout?

A)Howtodrinkwithoutlettingpeoplefindout.

B)Theimportanceofsafedrinking.

C)Howtoformgooddrinkinghabits.

D)Differentwaystotestalcoholinpeopleafterdrinking.

7.EtGcanlastforuptofivedaysin__________.

A)hair

B)blood

 

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