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9.Whydoesthewritermentiontheexampleof"newmothers"inparagraph2?A.Itshowsthebenefitsofthefarm-tohospitalmovement.B.IttellsusSt.Luke'sHospitalwhichcaresfornewmothers.C.Itemphasizestheimportanceofahealthydietfornewmothers.D.Itprovesorganic,locallyproducedfoodaccessibletothegeneralpopulation.10.Whatdoestheunderlinedphrase"gaintraction"meaninthelastparagraph?A.benefitB.developC.shrinkD.end11.Whatcanwelearnaboutthemovementfromthelastparagraph?A.Itischallengingbutpromising.B.Itgoessmooth.C.Ithasgainedpopularityatpresent.D.Itisexpensiveandunworthy.DThankstothefieldoflinguisticsweknowmuchaboutthedevelopmentofthe5,000pluslanguagesinexistencetoday.Wecandescribetheirgrammarandpronunciationandseehowtheirspokenandwrittenformshavechangedovertime.Forexample,weunderstandtheoriginsoftheIndo-Europeangroupoflanguages,whichincludesNorwegian,HindiandEnglish,andcantracethembacktotribesineasternEuropeinabout3000BC.So,wehavemappedoutagreatdealofthehistoryoflanguage,buttherearestillareasweknowlittleabout.Expertsarebeginningtolooktothefieldofevolutionarybiologytofindouthowthehumanspeciesdevelopedtobeabletouselanguage.Sofar,therearefarmorequestionsandhalf-theoriesthananswers.Weknowthathumanlanguageisfarmorecomplexthanthatofevenournearestandmostintelligentrelativeslikechimpanzees.Wecanexpresscomplexthoughts,conveysubtleemotionsandcommunicateaboutabstractconceptssuchaspastandfuture.Andwedothisfollowingasetofstructuralrules,knownasgrammar.Doonlyhumansuseaninnatesystemofrulestogoverntheorderofwords?Perhapsnot,assomeresearchmaysuggestthatdolphinssharethiscapabili-tybecausetheyareabletorecognisewhentheserulesarebroken.Humanbrainsallowedlanguagetoevolveinaway.Atsomepoint,ourbrainsbecameabletomakeourmouthsproducevowelandconsonantsounds,andwedevelopedthecapacitytoinventwordstonamethingsaroundus.Morequestionslieinlookingattheinfluenceofgeneticsonbrainandlanguagedevelopment.Itseemstohaveaconnectionwithspeakingandhowourbrainscontrolourmouthsandface.Monkeyshaveasimilargene,butitdidnotundergothischange.It'stooearlytosayhowmuchinfluencegeneshaveonlanguage,butonedaytheanswersmightbefoundinourDNA.12.Whathaveexpertsknownaboutlanguage?A.Howthehumandevelopedtouselanguage.B.Howlanguagechangedovertime.C.Howchimpanzeesconveytheiremotions.D.Howgenesaffectlanguage.13.WhatcapabilitydodolphinsshareinParagraph3?A.theinbornsystemofrulestogoverntheorderofwords.B.thecapabilitytoinventwordsandnamethings.C.thegrammarofdolphinlanguagefollowsthesamerulesashumanlanguage.D.thecapabilitytoproducevowelandconsonantsounds.高三英语第4页（共8页）
10.如图甲所示,一轻弹簧的两端与质量分别为m和m的两物块A、B相连接,并静止在光滑m1m2的水平面上。现使A瞬间获得水平向右、大小为3m/s的速度,以此刻为计时起点,两物块3m/s的速度随时间变化的规律如图乙所示,下列说法法正确的是4c/(ms^-1)A3BAA2BAm11m2t1甲-1t2t3t4A.在0t1时间内弹簧长度不断减小t3B.t时刻和t时刻弹簧长度相等B.t1C.0t4C.在0~t时间内物块B的位移大于物块A的位移D.两物块A、B的质量之比为m:m2=1:2m1:m2=1:2
5.如图甲所示,用于通讯的光纤由内芯和外套构成,光在内芯和外套的界面处发生全反射,所以光只在内芯中传播。对一段长直光纤,一束光由其左端的中心O点射入,若人射角在090^(趋近于90^)范围时,光只能在内芯中传播,就表明光能在内芯中正常传播。如图乙所示为某种光以α角人射时的传播光路图(α、θ已知),下列说法正确的是
1.日本将核废水排放到大海中,会对太平洋造成长时间的核污染。废水中含有铯、锶、点等多种放射性物质,其中铯137原子核具有较强的放射性,会发生衰变并释放能量,其半衰期长达30年。若铯137原子核的衰变方程为:55^137Cs55^137Ba+X,,下列说法正确的是A.铯137衰变时,衰变产物中的X为中子B.铯137衰变时,衰变产物中的X为质子C.虽然未衰变的铯137数量逐渐减少,但其半衰期并不改变D.排入太平洋后,废水中的铯137经过60年只衰变了四分之一
