高考英语一轮复习 Unit1 Living with technology 牛津译林版选修7.ppt

unit1livingwithtechnology 重点单词 1 play plays played played playing vi 玩耍 游玩vt 播放 扮演 承担 嘲弄 玩弄 进行比赛n 游戏 剧本 比赛 同 近义词 havefun takeon makefunof haveasportsgamewith game 温馨提示 1 play用作及物动词 与名词连用 有不同的用法并表示不同的意义 表示 进行球类运动 时 用playbasketball volleyball football etc 运动名称前不用冠词 表示 演奏西洋乐器 时 用playtheviolin thepiano etc 乐器名称前用定冠词 但如果演奏的是中国古典乐器 则乐器名称前不用冠词 表示 与 比赛 时 则用playsb ateam 2 playwith 则表示 动物或小孩子无意识的行为 玩耍 或是表示不严肃的态度 玩弄 必记搭配 playarole partin 在 扮演角色 起作用playfair规规矩矩地比赛 光明正大地行动 办事公办fairplay公正的态度 公平的比赛 光明正大的行动play about with 同 在一起厮混 玩弄 戏弄 不大认真考虑 某一问题 playwithfire玩火 做危险的事 2 wind winds wound wound winding vt 缠绕 卷绕theman sarmwaswoundwithbandages vt 给 上发条it stimetowindyourwatch vi 迂回 蜿蜒theroadwinds 必记搭配 winddown 人在紧张 兴奋之后 松弛下来windup使紧张 3 casualadj 偶然的 碰巧的acasualmeeting偶然的聚会adj 随便的 非正式的theguestsworecasualclothes 客人们穿着便服 adj 不小心的 漫不经心的shesoundedalmostcasual 她听起来几乎是漫不经心的 4 oppose opposes opposed opposed opposing vt vi 反对 使相对hehadopposedjim sentryrightatthebeginning 从一开始他就反对吉姆参与 温馨提示 表示 反对 的表达 1 opposesthwetotallyopposetheuseofgastokillanyanimal 我们完全反对使用毒气杀害任何动物 2 beopposedtosththeyareopposedtothedeathpenalty 他们反对死刑 在这个问题上 我们的观点截然不同 3 beagainststhnooneisagainstthisproposal 没有人反对这个提议 4 objecttosthireallyobjecttobeingchargedforparkingatthehospital 我坚决反对医院收取停车费 5 religiousadj 宗教的that sareligiousquestion 那是个宗教问题 adj 谨慎的 认真的shegavereligiousattentiontothedoctor sorders 她一丝不苟地遵照医生嘱咐 6 sacrifice sacrifices sacrificed sacrificed sacrificing vt 牺牲 奉献 把 作为祭品n 牺牲 同 近义词 devote offer 温馨提示 sacrificialadj 牺牲的 献祭的 必记搭配 makeasacrifice todosth 为做某事而做出牺牲 atthesacrificeof以牺牲 为代价sellsthatasacrifice亏本出售sacrificesthtosb 把 供奉 祭奠给某人sacrifice for 为 而牺牲 sacrificetime one slifetodosth牺牲时间 生命做某事 7 rid rids rid rid ridding vt 解除 免除 使摆脱 同 近义词 remove free 温馨提示 riddancen 摆脱 必记搭配 ridsb sthofsth sb摆脱 去掉ridoneselfofsth使自己摆脱某物beridof免除 摆脱 去掉bewellridof有幸摆脱了 getridof除掉 卖掉 摆脱掉 运用提升 从a b c d四个选项中 选出可以填入空白处的最佳选项 1 nomatterhowlowyouconsideryourself thereisalwayssomeone youwishingtheywerethathigh 2010安徽 a gettingridofb gettingalongwithc lookinguptod lookingdownupon 1 c gettingridof意为 摆脱 去除 gettingalongwith意为 与 相处 进展 lookingupto意为 尊敬 敬仰 lookingdownupon意为 看不起 轻视 句意为 你无论认为自己怎样低下 总希望有个高尚的人来尊敬你 2 thiswomansucceedsinhercareer thesacrificeofherfamily a atb forc withd through 2 a atthesacrificeof以牺牲 为代价 3 thatpieceofmusicsoundsquitefamiliar who thepianoupstairs 2011重庆 a hasplayedb playedc playsd isplaying 3 d 由sounds一词的时态可知此处应该用现在进行时 4 thesoldierswereputinprisonbecausethey toobeyorders a refusedb rejectedc deniedd objected 4 a reject及物动词 表示因为不令人满意 有缺陷或无用而抛弃 它暗示无条件地拒绝 refuse通常暗示决心且常带有粗鲁 既是及物动词也是不及物动词 可以与不定式连用 deny表示否认 object表示反对 5 theoldengineer seyesstillshonebrightinthewrinkledbrownfaceandhisstepashecameacrosstheroomwas thoughslow 2011湖北 a shakyb heavyc casuald steady 5 d 从后面的thoughslow可知此处应该选steady 稳健的 6 boredwithallthosetasks hedecidedtotakeaweekoff a windingupb towindupc windingdownd towinddown 6 d 此处考查wind的用法 windup意为 给 上发条 winddown意为 松弛下来 其中此处用动词不定式表目的 运用提升 从a b c d四个选项中 选出可以填入空白处的最佳选项 1 thetimehehasdevotedinthepasttenyears thedisabledisnowconsidered ofgreatvalue a tohelp beingb tohelping tobec tohelp tobed helping being 1 b devotetimetodoingsth奉献时间做某事 beconsideredtobe被认为 2 theuniversityoftokyoistheoldestuniversityinjapanandhasalwaysbeenintheleadwhenitcomesto newchallenges a facingtob facingc facingwithd facingupto 2 b 句意为 当面临新挑战时 日本老牌东京大学总是领先 face用作及物动词 面临 面对 faceupto 勇敢面对 befacedwith 面临 faceto 朝 向 3 itissaidthatdogswillkeepyou foraslongasyouwantwhenyouarefeelinglonely a safetyb companyc housed friend 3 b keepsbcompany陪伴某人 4 roseis atranslationofafrenchnovel a occupiedinb engagedinc absorbedtod busyin 4 b 四个词都有表示忙于某事的意思 用法和介词搭配上略有不同 beoccupiedwithsth indoingsth beengagedinsth doingsth beabsorbedinsth doingsth bebusywithsth bebusydoingsth 根据句意 从所提供的词组中选择恰当的词组填入相关的句中 注意词形的变化 1 inthisbusinesswehaveto ourforeigncompetitors 2 eversincetheni vebeenlongingtomeethim 3 restyoureyesbylettingthem distantobjects 4 pronunciationwhenyoulearnaforeignlanguage 5 heseemsunwillingto hisresponsibilitiesasafather keeppacewith facetoface focuson payattentionto faceupto 关键句型及惯用法 1 itallbeganin1877 whenthomasedisonmadethefirstrecordingofahumanvoiceonhisinvention therecordplayer p3 l27 28 译 一切都始于1877年 当时托马斯 爱迪生进行了对人类声音的第一次录音 itallbeganwhen 是一个常用的句型 表示 这一切 某事件或某情形 从 开始 句中的it为泛指代词 指代前文提到的事件或情形 句中的when引出的从句与in1877同为时间状语 可视为同位语从句 例如 thereisagenerationgapbetweenmyparentsandme itallbegan in2007 whenibeganmyseniorhighschoolandsometimesbegantogooutwithouttheirpermission 我与我的父母间有代沟 一切都得从2007年开始 那年我考入高中 并开始在没有得到他们的允许的情况下外出 趁热打铁 选择填空 lastnightwehadsuchaprobleminmyfamily itallbegan iwenttoaninternetcafeafterschool a whenb sincec whiled because 答案 a itallbeganwhen 句型运用 在这一句型中 itallbegan后紧跟的是when引出的时间状语从句 且从句中常用动作动词 2 couldyoupleasegivemesomeinformationaboutmobilephones p12 译 你能向我提供一些关于手机的信息吗 在英语中would could不一定总是表示过去时态 在问句中有时也用来表示委婉语气 might在陈述句中则表示不太肯定 excuseme couldyoutellmethewaytothebusstation 对不起 你能告诉我去汽车站怎么走吗 wouldyoucomeandfillintheapplicationformbyyourself 你能否自己过来填写一下申请表 iamnotsure buthemightbeanamerican 我不确定 但他也许是个美国人 思考 a would还能用于什么句型 b could还有哪些用法 c would could mightyou 问句应该怎样回答 答案 a would表示想要 iwouldliketodosth 引用他人讲话从句部分表示 将会 的内容 hesaidthathewouldbebackintenminutes 在含条件状语从句的虚拟语气句中 主句常用would 表示 可能 就会 b could有时与形容词的比较级连用强调某人或某物不可能再更多地具有某种属性 例如 youcouldn tbemorewrong 你真是大错特错 icouldn tbehappier 我简直是幸福极了 在含条件状语从句的虚拟语气句中 主句常用could 表示 很有可能 c would could mightyou 问句的回答用以下方式 其肯定回答不能沿用would could might 因为用这种方式则表示态度不是很明确 或是内心本来是不愿意等意思 would could mightyoupleaselendmeyourbook yes iwill yes ican ofcourse iamsure or no iamafraidnot buti 3 whilethesemessagesalwaysseemimportantatthattime mostpeoplecannotreallyrememberthemthenextday p15 l85 88 译 尽管这些信息当时显得很重要 但大部分人第二天就不记得它们了 while在此用作连词 引导让步状语从句 相当于though although 思考 while在英语中还有哪些常见的用法 答案 用作名词 表示 一段时间 如 i llbebackinawhile 我一会儿就回来 用作连词 引导时间状语从句 表示 当 时 和 同时 此时的主从句谓语动作同时发生 从句谓语通常是延续性动词 如 marywatchedtvwhilesheatehersupper 玛丽边吃晚饭边看电视 另外 如主从句的主语一致 且从句谓语又含有be 则从句主语和be可省略 while后可直接跟现在分词 名词 形容词或介词短语 如 weareteacherswhile weare servingasstudents 我们边当老师边当学生 theboyfellasleepwhile hewas doinghishomework 那个男孩子在做作业时睡着了 用作连词 表示前后对比 如 somepeoplewastefoodwhileothershaven tenough 有些人浪费粮食 然而有些人却吃不饱 用作连词 引导条件状语从句 意为 只要 其意思和用法相当于aslongas while可位于句首 也可位于句中 如 youdon thavetoworrywhilewearehere 只要我们在 你就别着急 用作连词 意为 同时 也 如 whilethebookiswelcomedbyscholars itwillmakeanimmediateappealtothegeneralreaders 这本书受到学者的欢迎 同时也会引起一般读者的兴趣 用作连词 意为 趁着 如 strikewhiletheironishot 谚 趁热打铁 运用提升 中译英 1 我们俩之间的误会得从上星期天的球赛说起 当时他认为我没有尽力而为 答案 asforthemisunderstandingbetweenus itallbeganonlastsundaywhenwehadamatchandhebelievedthatididn tgoallout forourteam 2 你能帮我把这封信交给吉姆吗 当然 但今天我没有空 明天好吗 答案 could wouldyouhelpmegivethislettertojim sure yes iwill yes ican butiamalittlebitbusytoday willtomorrowbeok 用while but however填空 1 itoldhimtofinishhishomeworkfirstandthenplaycomputergamesforanhour hejustdidn tlisten 2 whycan tidoaswellasjim nowihavefoundoutthesecret iwasabsent mindedinclasses hewasdeeplyconcentratedonwhattheteachersweretalkingabout 3 ihadthoughteverythinghadbeenready whenisetouttohandletheproblem iwastoldmuchmorehadhadtobedonefirst 答案 1 but 根据语境 前句表示我对他的要求 后句表示他并不听我的 这是转折关系 2 while 本句中对老师上课时 我和吉姆的表现进行了对比 3 however 前后有标点 表示意思的转折 然而 阅读下面短文 在空格处填写一个恰当的单词使全文通顺连贯 语法正确 thenewpocket sizedmark204dsolvesallyourlanguageproblems 1 greatall roundelectronicdictionarygivesyouchinesetoenglishtranslation aswellasenglish2 chinesetranslation spellcheck pronunciationguideandavarietyofwordswithsimilarandoppositemeaningsareallincluded this the to otherfeaturesincludehintsforthetoeflandieltsexams fmradioandgames theportablemark204disaperfectgiftforstudentsorbusinesspeople itonlyweighs96gramsandmeasures104 72 15mm 3 youneedquickandcorrecttranslations thestyluspen istheelectronicdictionaryforyou it selegantlyshaped 4 apen runitoveralineoftextanditdoesalltheworkforyou 5 hasaninbuiltloudspeaker6 aclearlcdscreen thestyluspen keepsthelast80wordsscannedforeasyreview andalsoletsyouread7 hearthedictionarydefinitionsofover100 000words if like it and or theministyluspen onlyweighs20grams itcomesinanelegantleathercase andhasaclipsothatyoucanwearitlikeapen forinstantaccess ituses8 aaabatteryandhasaone yearguarantee an 本单元我们复习的书面表达是写电子邮件 提出建议 写作须知1 电子邮件的格式要求 1 有称谓 但比较随意 2 首段点明写作目的 3 主体段内容明了 一则则的建议清晰明了 有时附有理由 4 尾段可点明写信目的 并给对方提出良好祝愿 5 有结束语 有落款 6 语言文体 有承接词 多用委婉句式 2 基本要点 措词要委婉 不能太直白 语言要简洁明了 层次分明 3 多用被动语态句式 4 结尾allthebest bestwishes 等 魔力模版1 魔力句子 1 i mgladtoreceiveyourletteraskingformyadviceon 2 hereareafewsuggestions 3 firstofall itisagoodideato as 4 then you dbetter not because 5 besides haveyoueverconsidered 6 what smore ifyoudid wouldbebetter 7 inaddition youcouldtry since 8 stillmore italsohelpto foryousee 9 moreover itisimportant useful helpfulto 10 lastbutnotleast itmaybebetterifyoucould 11 hopingeverythingwillgetallrightsoon 12 waitingtoseeyourproblemsolved 参考词汇 超速exceedthespeedlimit 违章者offender 斑马线pedestriancrossing 闯红灯gothroughtheredlight注意 1 词数不少于120 2 可以适当增加细节 使行文连贯 dearsir yours wangtao 参考范文 dearsir asaseniorhighschoolstudent wheneverigotoschool icanseesomepeoplebreakingtrafficrules forexample somepedestriansoftengothroughtheredtrafficlight andsomepeopledon tcrossthestreetatthepedestriancrossing what sworse somecarsexceedthespeedlimitonbusystreetsiftherearenopoliceworkingthere ihatetheseoffendersbutcan tdoanythingtostopthem inmyview itisthedutyofeverycitizentoobeythetrafficrulesforthesakeofyourandothers safety wemustn tneglectthefactthatalargenumberofpeopleareinjuredorkilledintrafficaccidentseveryyear isuggestwehavemorepolicemenorassistantsworkingatthecrossroadsandonthebusystreets whoeverbreakstherulesshouldbefinedandpunished onlyinthiswaywilleveryonefollowtherulesandcanwehaveabettertrafficenvironment yours wangtao unit1livingwithtechnology directions foreachofthefollowingunfinishedsentencestherearefourchoicesmarkeda b candd choosetheonethatbestcompletesthesentence 1 inthelongrun ourattentionmust economicconstruction a focusonb focusc befocusedd befocusedon 1 d focuson与attention之间为动宾关系 故用被动形式 2 abouttheeconomiccrisisthathedecidedtolookformoreinformationaboutit a socurioushewasb socuriouswashec suchcurioushewasd suchcuriouswashe 2 b 用so修饰形容词curious 且socurious放在句首 主句应用部分倒装 故选b项 3 themanisstrongenoughtoliftastone asmuchasfourhundredkilograms a weighedb weighingc toweighd beingweighed 3 b 此处考查weigh表 称起来 不表具体动作 而表主语性质时 用主动形式表被动意义的用法 此处还是非谓语 又是主动形式 所以选b 4 ihavetosaythatafteryoupresentedyouridea iagreewithyou a withadegreeb toadegreec byadegreed withthedegree 4 b 此处考查固定短语搭配 toa some certaindegree意为 从某种程度上 5 doyouknowthe3gmobilephonewillcomeintothemarketsoon really itissaidtobesuperior anyothermobile ican twaittobuy a to oneb than onec to itd than it 5 a besuperiorto比 更好 用one代指前面提及的同一类事物 6 manyproposalswereputforward thebossdecidedontheplan a becauseb beforec whetherd unless 6 b 此处考查before的用法 一般过去时态 before 一般过去时态 常作 然后 本句意为 许多的建议被提出 然后老板定下了这个计划 7 didjimhandinhisassignmentontime yes itwasnotyeteighto clock hefinishedit a beforeb whenc thatd until 7 b 本题考查句型 itis was 时间点 when引导的定语从句 本句意为 还不到8点 他就做完了 8 didjimhandinhisassignmentontime yes itwasbeforeeighto clock hefinishedit a beforeb whenc thatd until 8 c 本题考查强调句 如果itis was后接的是介词短语 则一定是强调句强调状语 所以填that 9 itiseightyears ilivedinthecountryside a sinceb whenc befored that 9 a 本题考查itis 时间段 since的固定句型 意思为 自从 到现在已经多久了 本句意思是 我不住在农村已经有8年了 10 heissuchadishonestman nobodywantstobelievein a as himb that 不填c as 不填d whom him 10 c 本题有两种填法 若把man当先行词 后面看成定语从句 由于先行词被such修饰 所以关系词用as 后面不填 第二种 把从句当做结果状语从句 引导词填that 第二个空填him 所以答案为c 11 theradiationamountofamobilephonefortwohalf hourperiodsperdayisequalto toanx rayfortenseconds a exposeb exposingc beexposedd beingexposed 11 d 此处考查beequalto中to是介词 所以后面要接动名词形式 而beexposedto是 接触 的意思 所以答案为d 12 isentforatechnician johnisn tfamiliar thecomputersoftwaretheyuse a incase withb incase toc sothat withd sothat to 12 a 根据本题意思 我派人去叫一个技术人员 以防john不熟悉他们使用的电脑软件 所以第一个空要填incase 第二个空 befamiliarwith 主语为人 befamiliarto主语为物 所以答案为a 13 thesituationishardto becauseheisn tamaneasyto a bedealt communicateb bedealtwith becommunicatedc dealwith communicatewithd deal becommunicatedwith 13 c 本题考查主系表结构 当表语是形容词时 后面的动词不定式用主动形式表被动意义 所以答案为c 14 isknowntousall onlythetheory practicecanbepractical a which baseonb which basedonc as basedond as basingon 14 c 第一个空应该填一个引导非限定性定语从句的代词 先行词为后面的整个句子 所以只能填as 因为which不能放句首 第二个空应该填非谓语动词作定语 由于bebasedon表 基于 所以用被动 答案为c 15 ihopetogotocollegenextyear always thatipassmyexams a assumeb toassumec assumingd assumed 15 c 本题考查assume作状语 由于句子主语和assume之间是主动关系 而且是非谓语作条件状语 所以我们用现在分词 directions completethefollowingsentencesbyfillingineachblankwithonewordthatbestfitsthecontext 16 ibelievethatallofuswillbenefitalot thiscompetition 17 citizensnowhavefreeaccess theparksandmuseums 18 tookherthewholeafternoontofinishthehomework 19 itwasnotuntiltherainstopped iwenthome from to it that 20 threeexcellentmusiciansmade thisbandin1999 21 mary withherhusband istravellingineurope 22 hopeprojectcontributes manychildrenreturningtoschool 23 thepresidenthad telephoneconversationwiththeforeignministerthismorning 24 theroomwasverysmall itwasverycomfortable 25 theartistwasborn october30th andbecamefamous the1990s up along to a however on in directions foreachblankinthefollowingpassagetherearefourwordsorphrasesmarkeda b candd fillineachblankwithawordorphrasethatbestfitsthecontext itisestimatedthatabout10millionpeoplegointocoastalwaterseveryyeartogetacloserlookatwhales whentheeco touriststrytohavealookatthe 26 mammalsrisingabovethewaterline killerwhales livesaregreatly 27 thoughtheyarethetopofthefoodchaininthesea wenowhavemorewhale watchingboatsthantherearewhales saidkelleybalcombbartokofan 28 inwashingtonstatewhichworkswithscientiststoprotectwhales allthisactivityiscausingpeopletoshowmore 29 aboutthewhales healthandsurvival somescientistssaynoisefromalltheboattrafficmay 30 awhale ssonar 声纳 声波 abilityasmuchas95percent thewhalesneedsonartofindfood thenewstudies 31 thismonthsuggesttheinterferencecausedbythetouristsis 32 thewhales whosepopulationinthepugetsoundregionhas 33 from98to80inlessthanadecade scientistssayallthetrafficalsoforcesthewhalestomovearoundmorn wastingenergyneededfor 34 food iwouldsaythatattimeswhentherearealotofboatsandthereisalotofnoise theyareeasily 35 saidtommcmillen captainofthewhale watchingboatstellarsea whichtakesoutthreegroupsaday scientistssaythereislessfoodintheseaforthewhalestoeat 36 thepopulationintheseaismoreserious obviouslythe 37 fromtheboatsmakethelifeofthewhalesevenworse 26 a hugeb poisonousc delicated cautions 27 a refreshedb discoveredc threatenedd witnessed 26 a whales是巨型的哺乳动物 所以此处填写huge 27 c 根据后面一句 尽管killerwhales处于食物链的顶端 但是它们的生命还是受到威胁 构成转折关系 答案为c 28 a activityb organizationc aread avenue 29 a sympathyb enthusiasmc excitementd concern 28 b 根据定语从句whichworkswithscientiststoprotectwhales 可以得出只能是organization才能workswithscientists 所以答案为b 29 d 根据上下文 whales的生命受到威胁 所以人们应该是对此关注 所以答案为d 30 a stopb decreasec increased improve 31 a releasedb abandonedc predictedd relieved 30 b 因为船多 所以减弱了whales的超声波 而它们需要超声波帮助寻找食物 31 a 新发布的研究结果 所以用released 32 a damagingb destroyingc woundingd supporting 33 a changedb sunkc reducedd fallen 32 a 根据后面定语从句说whales数量在减少 所以说明是在毁坏whales 而destroy是表示摧毁 过重 所以选damaging 33 d 根据句意是鲸鱼的数量由98降到了80 故选d 而reduce为及物动词要接宾语 34 a tastingb huntingc searchingd eating 35 a astonishedb annoyedc disappointedd excited 34 b 消耗了本用来寻找食物的能量 所以答案为hunting searching是不及物动词 要与for搭配 35 b 从上下文看出 是船只和船只的噪音影响了whales 所以whales是annoyed 36 a butb orc whiled besides 37 a soundb voicec noised echo 36 d 上句说食物锐减 后面说鲸鱼数量在减少 所以两者都是描述状况不好 属并列关系 37 c 船发出的声音对于whales来说是noise directions completethefollowingpassagebyfillingineachblankwithonewordthatbestfitsthecontext accordingtothedailymailofoctober31 athirdof33 year oldssaytheygetanaverageofonlyfivehourssleepanight asurveysuggests twothirdsclaim38 theyspendmorethan38hours39 weekintheoffice and60percentsaytheyareforcedtodoublebookworkandsocialappointmentstotrytosqueeze 挤 everything that a in 40 workandfamilycommitmentsaredealtwith theaverage33 year oldhasonlyonehouradaylefttodo41 theyenjoy andeventhen one42 fivesaystheyaresobusythatthey43 haveanytimetogooutandsocialize fifty sixpercentregularlyneedtotakeworkhometocomplete44 accordingtothestudybyinternetmailproviderhotmail ninetypercentof33 year oldwomeninthesurveysaidtheythoughttheywerebusier45 menofthesameage once after when as something what in never don t it than directions readthefollowingtwopassages eachpassageisfollowedbyseveralquestionsorunfinishedstatements foreachofthemtherearefourchoicesmarkeda b candd choosetheonethatfitsbestaccordingtotheinformationgiveninthepassage ascientistshavedevisedawaytodetermineroughlywhereapersonhaslivedusingastrand 缕 ofhair atechniquethatcouldhelptrackthemovementsofcriminalsuspectsorunidentifiedmurdervictims themethodreliesonmeasuringhowchemicalvariationsindrinkingwatershowupinpeople shair you re what you eat and drink andthat srecordedinyourhair saidthurecerling ageologistattheuniversityofutah whileu s dietisrelativelyidentical watersuppliesvary thedifferencesresultfromweatherpatterns thechemicalcompositionofrainfallchangesslightlyasraincloudsmove mosthydrogenandoxygenatomsinwaterarestable buttracesofbothelementsarealsopresentasheavierisotopes 同位素 theheaviestrainfallsfirst asaresult stormsthatformoverthepacificdeliverheavierwatertocaliforniathantoutah similarpatternsexistthroughouttheu s bymeasuringtheproportionofheavierhydrogenandoxygenisotopesalongastrandofhair scientistscanconstructageographictimeline eachinchofhaircorrespondstoabouttwomonths cerling steamcollectedtapwatersamplesfrom600citiesandconstructedamapoftheregionaldifferences theycheckedtheaccuracyofthemapbytesting200hairsamplescollectedfrom65barbershops theywereabletoaccuratelyplacethehairsamplesinbroadregionsroughlycorrespondingtothemovementofrainsystems it snotgoodforpinpointing 精确定位 cerlingsaid it sgoodforeliminatingmanypossibilities toddpark alocaldetective saidthemethodhashelpedhimlearnmoreaboutanunidentifiedwomanwhoseskeletonwasfoundneargreatsaltlake thewomanwas5feettall policerecovered26bones at shirtandseveralstrandsofhair whenparkheardabouttheresearch hegavethehairsamplestoth