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如图,在△ABC中,DE∥BC,=,则的值是( )
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如图在边长为2的等边△ABC中D.为BC的中点E.是AC边上一点则BE+DE的最小值为.
如图△ABC中D.是BC的中点DE∥ABBF平分∠ABC交DE于点F.若DF=6则BC的长是____
如图在△ABC中∠BAC=90°AB=AC点D.为边AC的中点DE⊥BC于点E.连接BD则tan∠D
如图在等腰三角形△ABC中AC=BCD.E.分别为ABBC上一点∠CDE=∠A.1如图①若BC=BD
如图△ABC中D.是BC上一点DE⊥ABDF⊥AC垂足分别为E.F.1若D.是BC的中点且DE=DF
如图△ABC中BE平分∠ABCDE∥BC若DE=2ADAE=2那么EC=.[
.如图Rt△ABC中∠C.=90°BC=4AC=6现将△ABC沿ED翻折使点A.与点B.重合折痕为D
如图在△ABC中DE//BC若AD=1BD=2BC=9则DE=
2
3
4
5
如图在Rt△ABC中∠ABC=90°点D.是AC的中点作∠ADB的角平分线DE交AB于点E.1求证D
已知如图△ABC中AB=AC=10D.是BC边上的任意一点分别作DF∥AB交AC于F.DE∥AC交A
如图在△ABC中已知DE∥BCAD=4DB=8DE=3.1求的值2求BC的长.
如图在△ABC中DE∥BCDE=2BC=3.求的值.第21题
如图在△ABC中若DE∥BCAD=5BD=10DE=4则BC的值为
8
9
10
12
如图所示△ABC中DE∥BCAD=5BD=10AE=3.则CE的值为
9
6
3
4
如图J68在△ABC中AB=BC=12cm∠ABC=80°BD是∠ABC的平分线DE∥BC.1求∠
如图在Rt△ABC中∠B.=90°AB=4BC>AB点D.在BC上以AC为对角线的所有平行四边形AD
如图在△ABC中DE∥BCADDB=12DE=2则BC的长是______.
如图11在△ABC中BC是以AB为直径的⊙O.的切线且⊙O.与AC相交于点D.E.为BC的中点连接D
如图在△ABC中DE∥BCAD=3AE=2BD=4求的值以及ACEC的长度.
如图△ABC中BE平分∠ABCDE∥BC若DE=2ADAE=2那么EC=.
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6分Moviemakersatonetimeworriedthattheymightbeputoutofbusinessbytelevision.Recentlyhowevermoreandmorepeoplehavebeengoingtothemovies.ThismaybepartlybecausetheeconomicsituationinAmericahasworsened.Whenatthemoviespeopleforgettheirtroublesastheygetinvolvedinthestoryonthescreen.Alsodirectorshaverecentlybeenproducingpicturesthatlargenumbersofpeoplewanttosee. Americansinthemillionsarereturningtotheirloveaffairwiththemovies.MotionpictureindustryexpertsseetwomainfactorsresponsibleforthisanincreasedneedbyAmericanstoescapefromeconomicworriesandalargenumberofnewmovieswithbroadaudienceappeal. Moviemakersadmitthattheirrisingpopularityispartlytheresultofpooreconomicconditionswhichtraditionallybringanincreaseintheaterattendance.WhenpeoplearefearfulaboutthefuturetheylookforescapecommentsJackValentipresidentoftheMotionPictureAssociationofAmerica.Inashadedtheaterwitha65﹣footscreenyouloseyourselffortwoandahalfhoursandpeoplefindthisbeneficial. 1Whatdidmoviemakersworryaboutbefore? A.Thatnoonewouldgotothecinema. B.Thatmoviescouldn'tbeabusinessanymore. C.Thattheirmoviesmightbeplayedontelevision. D.ThatpeoplepreferredwatchingTVtoseeingfilms. 2Whyaresomanypeoplegoingtoseemoviesnow? A.Becausepeoplenowhavemuchmoremoney. B.Becausepeoplehavetroubles. C.Becausepeoplewantedtoescapefromreallife. D.BecausewatchingmoviesisnowmuchcheaperthanwatchingTV. 3What'sthepassagemainlyabout? A.ThatmoreAmericanpeoplearewatchingmoviesthanbefore. B.Thattelevisionwilltaketheplaceofmovies. C.America'seconomicdepression. D.ThatAmericansprefertowatchmoviesratherthanwatchTV.
30分Inalandfarawayonceuponatimetherewasgreatpoverty贫困andonlytherichcouldmanagewithoutgreat1.Threeofthoserichmenandtheirservantswere2togetheronaroadwhentheycametoavery3village. Thefirstcouldnotstandseeingthepoverty4hetookallthegoldandjewelsfromhiswaggons四轮载重马车andshared5outamongthevillagers.Hewishedthemallthebestofluckandheleft. Thesecondrichmanseeingthe6situationstoppedforashorttimeandgave7allhisfoodanddrinksincehe8seethatmoneywouldbeoflittle9tothem.Hemadesurethattheyeach10theirfairshareandwouldhaveenoughfoodto11forsometime.Thenheleft. Thethirdrichmanonseeingsuchpoverty12andwentstraightthroughthe13withoutstopping.Thetwootherrichmensawthisfromadistanceandcommentedwitheachother14thethirdrichmanlackedsympathy.Itwas15thattheythemselveshadbeentheretoofferhelp. Howeverthreedayslaterthey16thethirdrichmanwhowascomingintheoppositedirection.Hewas17travellingquicklybuthiswagons18thegoldandvaluablestheyhadbeen19werenowfulloffarmingtoolsandbagsof20.Hewasrushingbacktohelpthemoutofpoverty. 1A.loss B.expectations C.success D.problems 2A.standing B.travelling C.gathering D.running 3A.faraway B.poor C.different D.ancient 4A.unless B.because C.so D.if 5A.them B.anything C.nothing D.those 6A.curious B.worrying C.dangerous D.puzzling 7A.thevillagers B.hisservants C.theothers D.therest 8A.could B.might C.should D.must 9A.interest B.concern C.use D.attraction 10A.returned B.gained C.offered D.received 11A.remain B.last C.supply D.share 12A.turnedback B.setout C.showedoff D.speededup 13A.village B.land C.field D.road 14A.whether B.how C.where D.when 15A.good B.certain C.true D.strange 16A.welcomed B.met C.accepted D.persuaded 17A.still B.already C.always D.indeed 18A.exceptfor B.insteadof C.apartfrom D.alongwith 19A.loading B.treasuring C.carrying D.earning 20A.food B.jewels C.money D.seeds
1分﹣Janewhichcolordoyoupreferredorblue? ﹣.Iprefertobuyagreenone. A.EitherwillbeOK B.BothwillbeOK C.Tobehonestneither D.GenerallyI'mnotsure
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10分I'velovedmymother'sdesksinceIwasjusttallenoughtoseeabovethetopofitasmothersatdoingletters.StandingbyherchairlookingattheinkbottlepensandwhitepaperIdecidedthattheactofwritingmustbethemorewonderfulthingintheworld. Yearslaterduringherfinalillnessmotherkeptdifferentthingsformysisterandbrother.Butthedeskshe'dsaidagainit'sforElizabeth. Ineversawherangryneversawhercry.Iknewshelovedme;sheshoweditinaction.ButasayounggirlIwantedheart﹣to﹣hearttalksbetweenmotheranddaughter. Theyneverhappened.Andagulfopenedbetweenus.Iwastooemotional易动感情的.Butshelivedonthesurface表面. AsyearspassedIhadmyownfamily.Ilovedmymotherandthankedherforourhappyfamily.Iwrotetoherincarefulwordsandaskedhertoletmeknowinanywayshechosethatshedidforgive原谅me. Ipostedtheletterandwaitedforheranswer.Nonecame. Myhopeturnedtodisappointment失望thenlittleinterestandfinallypeace﹣itseemedthatnothinghappened.Icouldn'tbesurethattheletterhadevengottomother.IonlyknewthatIhadwrittenitandIcouldstoptryingtomakeherintosomeoneshewasnot. Nowthepresentofherdesktoldasshe'dneverbeenabletothatshewaspleasedthatwritingwasmychosenwork.Icleanedthedeskcarefullyandfoundsomepapersinside﹣aphotoofmyfatherandaone﹣pageletterfolded折叠andrefoldedmanytimes. Givemeananswermyletterasksinanywayyouchoose.Motheryoualwayschosetheactthatspeakslouderthanwords. 1Thewriterbegantolovehermother'sdesk. A.afterMotherdied B.beforeshebecameawriter C.whenshewasachild D.whenMothergaveittoher 2Thepassageshowsthat. A.motherwascoldonthesurfacebutkindinherhearttoherdaughter B.motherwastooseriousabouteverythingherdaughterhaddone C.mothercaredmuchaboutherdaughterinwords D.motherwrotetoherdaughterincarefulwords 3Thewordgulfinthepassagemeans. A.deepunderstandingbetweentheoldandtheyoung B.differentideasbetweenthemotherandthedaughter C.freetalksbetweenmotheranddaughter D.partoftheseagoingfarinland 4Whatdidmotherdowithherdaughter'sletteraskingforgiveness? A.Shehadneverreceivedtheletter. B.Foryearssheoftentalkedabouttheletter. C.Shedidn'tforgiveherdaughteratallinallherlife. D.Shereadtheletteragainandagaintillshedied. 5What'sthebesttitleofthepassage? A.MylettertoMother B.MotherandChildren C.Mymother'sDesk D.TalksbetweenMotherandMe
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8分LongagotherewasasmallvillageinCambodia.Thepeoplewerepoor.Howevertheywerenotunhappy.Afteralltheirforefathershadlivedinthesamewayforcenturies. Thenonedaysomevisitorsfromthecityarrived.Theytoldthevillagersthereweresomepeopleelsewherewholikedtoeatfrog'slegs.Howevertheydidnothaveenoughfrogsoftheirownandsotheywantedtobuyfrogsfromotherplaces. Thisseemedlikemoneyfornothing.Thereweremillionsoffrogsinthefieldsaroundandtheywerenousetothevillagers.Alltheyhadtodowastocatchthem.Agreementwasreachedandthechildrenweresentintothefieldstocatchfrogs.Everyweekatruckarrivedtocollectthecatchandhandoverthemoney.Forthefirsttimethepeoplewereabletodreamofabetterfuture.Butthedreamdidn'tlastlong. Thechangewashardlynoticedatfirstbutitseemedasifthecropswerenotdoingsowell.Moreworryingwasthatthechildrenfellillmoreoftenandthereseemedtobemoreinsectsaroundlately. Thevillagersdecidedthattheycouldn'tjustwaittoseethecropsfailingandthechildrengettingweak.Theywouldhavetousethemoneyearnedtobuypesticides杀虫剂andmedicines.Soontherewasnomoneyleft. Thenthepeoplerealizedwhatwashappening.Itwasthefrog.Theyhadn'tbeenuseless.Theyhadbeendoinganimportantjob﹣﹣﹣eatinginsects.Nowwithsomanyfrogskilledtheinsectswereincreasingmorerapidly.Theyweredamagingthecropsandspreadingdiseases. Nowthepeoplearestillpoor.Butintheeveningstheysitinthevillagesquareandlistentosoundsofinsectsandfrogs.Thesesoundsofthenightnowhaveamuchdeepermeaning. 1FromParagraph1welearnthatthevillagers. A.workedveryhardforcenturies B.werepoorbutsomewhathappy C.dreamedofhavingabetterlife D.livedadifferentlifefromtheirforefathers 2Whydidthevillagersagreetosellfrogs? A.Thefrogswereeasymoney. B.Theyneededmoneytobuypesticides. C.Theywantedtopleasethevisitors. D.Thefrogsmadetoomuchnoise. 3Whatmightbethecauseofthechildren'ssickness? A.Thecropsdidn'tdowell. B.Thepesticideswereoverused. C.Thevisitorsbroughtindiseases. D.Thereweretoomanyinsects. 4Whatcanweinferfromthelastsentenceofthetext? A.Happinesscomesfromapeacefullifeinthecountry. B.Healthismoreimportantthanmoney. C.Theharmony和谐betweenmanandnatureisimportant. D.Goodolddayswillneverbeforgotten.
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8分Football﹣﹣calledsoccerintheUnitedStates﹣﹣isprobablythemostpopularsportintheworldtodayIthasbeenpopularforalongtime.Butmanyyearsagoeachcountryhaddifferentrulesforitsownfootballgame. In1863agroupofpeoplemetinEnglandtochangethis.Theywroteasetofrulesforallcountriestofollow.Theyalsoplannedforsoccerteamsfromdifferentcountriestoplayagainsteachother.Theideaworked.Theserulesarethesametodaymorethan100yearslater.NowteamsfromalltheworldcompeteinthefamousWorldCup.Thecupisaseriesofgameswhichisheldeveryfouryears.Teamfrommanycountriesplaystoseewhichisthebest.Soccerissopopulartodaythatitisnotunusualfor600millionpeopletowatchaWorldCupmatchontelevision. HowdidtheWorldCupstart?ThesoccerteamfromUruguaywontheOlympicchampionshipinsoccerin1924and1928.ThatcountrydecidedtohavethefirstWorldCupgamesinMontevideoin1930Thesefirstgameswerenotverysuccessful.OnlythirteenteamsarrivedtoplayandeightofthemwerefromSouthAmerica. Itdidn'tseemlikeaworldchampionship.TheteamfromUruguaywontheCupthatfirstyear. 1In1863agroupofpeoplemetinEngland. A.toplayforfootballteamsfromdifferentcountries B.tolearntherulesforfootball C.towriteasetofrulesforfootball D.tohavematchesbetweenteamsfromdifferentcountries 2Theruleswrittenin1863are. A.thesameastoday's B.differentfromtoday's C.changedalot D.changedalittle 3WhendidthefirstWorldCuptakeplace? A.In1930. B.In1924. C.in1928 D.In1934 4ThefirstWorldCupwasnotsuccessfulbecause A.theOlympicchampiondidn'ttakeplace B.someoftheteamsarrivedtoolate C.allteamswerefromSouthAmerica D.itdidnotseemlikeaworldchampionship
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25分假如你是星光中学的学生李华将参加主题为MyChineseDream的英语演讲比赛请撰写一篇演讲稿主要内容包括 1.梦想成为一名山村教师帮助山村孩子 2.山区偏僻教育落后 3.父母和朋友都反对 4.我会… 注意1.词数100左右 2.开头和结尾已为你写好. Goodmorningeveryone! Thankyou!
20分Iwillalwaysappreciatemyfatherandhisfaith. AsIheldmyfather'shandsonenightIcouldn'thelpbutnoticetheircalluses老茧androughness.Hishandstellthestoryofhislifeasa1includingallhisstruggles. One2Irememberadrought旱灾hitOntarioturningitintoaburningdesert.OnoneofthosehotmorningsIwaspickingsweetcornwithmydadtofillthelast3fromthegrocerystore.Fiftydozenwasallweneededwhich4tooktwentyminutes.Thatmorninghowevertheprocessdidn'tgoquickly.Afterfortyminutesof5walkinginthefieldwe6neededtwentydozen.Iwascompletelyfrustratedandangry.7thebasketheavilyIdeclaredIfthestorewantsitslasttwentydozentheycanpickitthemselves!Dadlaughed.Justthinkmylittlegirlonly8dozenleftforeachof9andthenwe'redone.SuchisDad﹣﹣﹣﹣whateverproblemhe10henevergivesup. 11thedisastrouseffectsofthedroughtwerefeltalloverourcounty.Itwasachallengingtimeforeveryone12Dadremainedoptimistic.He13tobegratefulforotherthingslikegoodhealthandfoodonourplate.OnlythendidItrulybeginto14Dadandhisfaiththatguidedusthroughthehardtimes. Dadisalsoalivingexampleofreal15.Fromdawntoduskheworkscountlesshoursto16ourfamily.Healwaysputsourhappiness17hisownandneverfailstocheermeonatmysportsgames18hisexhaustion疲劳afterlongdays.Hislovingandselflessnaturehasinspiredmetobecomemoresympatheticand19othersfirst. Dadthelife20Ihavelearnedfromyouwillstaywithmeforever.Youaremyfatherteacherfriendandmostimportantlymyhero. 1A.teacher B.grocer C.gardener D.farmer 2A.spring B.summer C.autumn D.winter 3A.gap B.form C.order D.position 4A.usually B.repeatedly C.finally D.really 5A.happily B.aimlessly C.easily D.hardly 6A.yet B.even C.still D.nearly 7A.Cutting B.Taking C.Picking D.Dropping 8A.five B.ten C.twenty D.fifty 9A.them B.you C.me D.us 10A.bringsup B.meetswith C.worksout D.thinksabout 11A.Thankfully B.Strangely C.Hopefully D.Unfortunately 12A.or B.for C.but D.so 13A.happened B.stopped C.aimed D.continued 14A.face B.examine C.appreciate D.question 15A.love B.pride C.friendship D.honesty 16A.settle B.support C.start D.impress 17A.before B.after C.beside D.under 18A.intermsof B.incontrolof C.inspiteof D.inplaceof 19A.putting B.cheering C.thinking D.turning 20A.lessons B.styles C.ways D.history
10分假定英语课上老师要求同桌之间交换修改作文请你修改你同桌写的以下作文.文中共有10处语言错误每句中最多有两处.每处错误仅涉及一个单词的增加删除或修改. 增加在缺词处加一个漏字符号∧并在其下面写出该加的词. 删除把多余的词用斜线\划掉. 修改在错的词下划一横线并在该词下面写出修改后的词. 注意1.每处错误及其修改均仅限一词 2.只允许修改10处多者从第11处起不计分. Deareditor Inthepastmyhometownwasusedtobeabeautifulplace.Thicktreesandgreengrasscouldbeseenineverywhere.Inordertobuildhouseandgrowmorecropspeoplecutdownmoreandmoretrees.Withtimewentonthewholeforestwasalmostdestroyed.Thegreenhillshavechangedintowasteland.Asresultsandstormsstruckusnowandthenfromthatwesufferalot.HoweverIdohopeallthepeopleshouldrealizetheterriblyresultofnotcaringaboutourenvironment.What'smoretheyshouldtakegoodcareoftheforestsandplanttreesinsteadofcuttingthemdowntoimproveourlivingconditions.
10分Mostofusleadabusylife.1WethinkIfIreachedmygoalthenIwouldbehappyorIfIcouldgetabetterjobthenIwouldenjoylife.Butwhynotenjoyliferightnow? Firstlytaketimetonoticeandappreciatethebeautyinyourownsurroundings.2Thereisagreatbigworldofwonderandbeautyaroundus!AndasBrodersenexplainsLookforthebeautyofthesunriseandofafriend'ssmilethatbrightensyourday.Openyoureyestoseethebeautyyoumightnotnormallysee.Doingsohelpstocheeryouup. Secondlytakingtimetoexperiencesomesimplepleasuresalsocanbringjoytoyourheartandeaseyourstress.Takemeforexample.3Oneuniversalsimplepleasureisfindingthingsthatmakeyoulaugh.Maketimetolaugheveryday. Thirdlydon'ttakeyourfamilyandfriendsforgranted.Richrewardingrelationshipsaddgreatlytotheenjoymentoflife.Whenyouthinkofsomeonewhynotcalle﹣mailorwritethem?4AsWayneLawtonexplainsInvest投资timetorelationships.Removetheattitudewhat'sinitforme?Happinessisfoundinputtingother'sinterestsdesiresandconcernsaheadofourownwheneverpossible.Selfishnessisadead﹣endstreet.5. A.Beawareofbeautyinnature. B.InmysparetimeIenjoycollectingstampsandreadingnovels. C.Drivenbytheurgentweforgettoenjoylife. D.Ashorte﹣mailorphonecallcanmakeaworldofdifferencetosomeone. E.Youdon'tneedtotravelfartofindbeauty. F.Idelightinsimplethingslikemyfavoriteteadrinkabubblebathorfamilyphotos. G.Sopleasetreasurerelationship.
10分1oneofthebestthingsyoucanpossiblydoistostartyouownclub.It'sgreatfunespeciallyifyouarethesortofpersonwhofeelsthere'sneveranythingtododuringtheschoolholidays.Thefirstthingyouneedtocomeupwithisanideaforyourclub.2petsclothespopmusicordancinggroupssportsmakingthings?Thelistisendless.Nextyouneedsomefriendstobeinyourclubwithyou.3Allyouneedisthreeorfourotherpeoplewhoareinterestedinthesamethingasyou.4youshouldallsitdownsomewheretogetherwithlotsofpiecesofpaperandwritedowneverynameyoucanthinkup.That'llkeepyoubusyforages.Atyourfirstmeetingyoushouldmakeuparulebook.Andthefirstruleshouldbenogrown﹣upsorlittle/bigbrothersorsisters!Thebestclubsarealwayssecret!Nowyouhavejustabouteverythingyouneedexceptmembershipcards.Theseareveryimportantandagainyoucanspendalotoftimemakingthem.5whynotleavesomespaceforaphotoofyourself?Thatwillmakethemembershipcardreallylooklikeit.Sothereyouaregetclubbing!Onceyougetstartedyou'llthinkofloadsofmoreinterestingthingstodo! A.That'seasy. B.Enjoyyourownclub! C.Inviteadesignertojoinyou. D.Whatareyouinterestedin? E.Somevacationisjustaroundthecorner. F.Thenyouneedtopickanameforyourclub. G.Useabrightthickpentomakeaspecialdesign.
7.5分WiththeRioOlympicgamesgoingoncupping拔罐isbecomingwellknownallovertheworld. Cuppingcomesinseveralforms.Withdrycuppingtherapists特定疗法的技师usecupsthatsticktobutdon'tbreaktheskin.Theycanusecupswithmechanicaldevicessuchashandorelectricalpumpstocreatesuction吸.Ortheycanusefirecupswhichusetheirheatforsuction. Inwetcuppingatherapistwillfirstpuncturetheskinusingwhatlookslikeatoothbrushwithlittleneedlesthesuctioncupsslowlyfillwithblood. Thebasicideaisthatcreatingbruises淤青willencouragethebodytohealmorequicklyinthosetargetedareas. Whetheryou'reaworld﹣classathletecompetingintheRioOlympicsorajournalistbackandneckpaincanberealoccupationalhazards职业病困扰. TotreattheirsoremusclesU.S.competitorslikefamousswimmerMichaelPhelpsandgymnastAlexNaddourhaveallturnedtoanancientformoftreatmentcalledcupping. Thetechniqueinvolvesplacingsmallglasscupsontheskinthenpullingthemfromthebodytorelaxthemusclesandboostbloodflow. ThesuctioncupsleavebehindcircularbruisesliketheonesPhelpsshowedoffonSundaynightinthemen'sfreestylerelayfinals. WhilecuppingisarelativelycommonpaintreatmentinEasternculturesit'sstillarareandlittle﹣studiedpracticeintheUnitedStates. ButwithOlympiansshowingofftheirpurplediscslikegoldmedalscuppingcouldsoonbeverypopularwithathletesdeskjockeysandotherAmericanssufferingbonejointandmusclepainsaidDr.CharlesKimaspecialistatNewYorkUniversity'sLangoneMedicalCenter. PerhapssomethinglikethiswillopenuptheAmericanpublicandmaybeencouragefurtherresearchandoversightofcuppingasapotential潜在的treatmenthetoldMashable. 1Howmanywaysofcuppingaltogetherarementionedintheparagraph? A.One. B.Three C.Five D.Seven 2Whatdoestheunderlinedwordpunctureinthesecondparagraphprobablymean? A.makingcutsontheskinwithaknife B.makingtinyholesintheskinwithsharppoints C.makingnotseriousburnsontheskinwithfire D.makingclearbruisesontheskinwithasuctioncup 3Whichofthefollowingiscorrectaccordingtothepassage? A.Americanshavecarefullystudiedthetreatmentwithcupping. B.Cuttingisaverypopulartreatmentinthewesternworld. C.AlexNaddourisasciencereporterwhohaswrittenalotofreportsaboutcupping. D.Inwetcuppingtherapistsstillusehandpumpsorfiretocreatesuction.
15分Iamextremelyhonoredtobeselectedasawinnerofthisyear'sLasker﹣DeBakeryClinicalMedicalResearchAward.Iexpressmywholeheartedthankstothejurymembersfortherecognition认可ofmy1contributetothediscoveryofQinghaosu青蒿素formalaria疟疾treatment. InmychildhoodIwitnessedoccasionswhenpatients2rescuebyfolkChinesemedicinerecipes.Howeverneither3Idreamthenofsuchacloselinkofmywholelifetoresearchingthoseamazingherbs草药norcouldIimaginethenthattodayIwouldexperiencesuchanexcitingmomentwhenmyresearchhasbeenhighlypraisedbytheinternational4sciencecommunity.Istartedresearchonherbalmedicinesin1955.My5curiousaboutherbsturnedintoastrongmotivationaftercollegetrainingontraditionalChinesemedicine6arrangebytheinstitute.EquippedwithasoundknowledgeinbothtraditionalChinesemedicineandmodernpharmaceuticalsciences制药学we7successaccomplishedthediscoveryanddevelopmentofQinghaosufromQinghao. ThediscoveryofQinghaosuis8gifttomankindfromtraditionalChinesemedicine9hasservedpeopleinChinaandotherAsiancountriesformanycenturies.Continuousexplorationanddevelopmentoftraditionalmedicinewill10doubtbringmoremedicinestotheworld.…
8分Theworld'searliestknownfishhooks钩showthathumansfishedintheopenseaformuchlongerthanpreviouslythought.Paststudieshaveshownthatearlyhumanswereabletocrosstheopenoceanasfarbackas50000yearsagobutevidencethattheycouldfishwhileintheopenseadatedbackonlyto12000yearsago. Inmostareasoftheworldevidenceforourearlyancestors'coastalexploitation开发wasdrownedbyrisingsealevelssaidresearcherSueO'Connor. NowO'Connorandhercolleagueshavefoundevidenceofprehistoricfishingtoolsandtheremainsoflargefishsuchastuna金枪鱼atacaveshelterknownasJerimalailocatedintheSoutheastAsianislandnationofEastTimor.Theirdiscoveryuncoveredfishinghooksmadefrombonethatdatebacktoabout42000yearsago. MIfspossiblethatpeoplecaughtthetunainthedeepchannelthatliesoffthecoastoftheJerimalaishelterO'Connorsaid. Thesitefirstuncoveredin2005alsoincludedbonepointsshellbeadstheremainsoffishturtlesbatsandbirdsandnearly10000stonetools.TheislandofTimorhasveryfewlandanimalsoverallandonlysmallbirdscalltheislandhomeperhapsexplainingwhytheancientpeopleherewentfishing.Abouthalfthefishremainsatthesitecamefromfishsuchastuna.Catchingsuchfast﹣movingfishrequiresmuchplanningandcomplextechnologysuggestingthatearlyhumansdevelopedtheseskillsearlierthanpreviouslythought. Someotherscientistsmightsaythatmostofthefishbonesseenarefromyoungfishandthusmighthavebeencaughtmoreeasilyoffthecoastasopposedtoinopenwaters.Whilethismaybethecaseit'sstillnoteasytocatchtuna一itrequiresnetssetindeepwater. 1AccordingtoSueO'Connorevidenceforourearlyancestors'coastalexploitation. A.indicatedtunawasacommondishforourearlyancestors B.showedthetrendofseamovement C.wasburiedincaveshelters D.wasdifficulttofind 2SueO'Connor'sstudyadvancedthedateofhumans'fishingintheopenseaby. A.50000years B.42000years C.30000years D.12000years 3WhydidtheancientpeopleontheislandofTimorgofishingaccordingto. A.Theislandwastoosmallforthelargepopulation. B.Therewerefewanimalsonlandforfood. C.Itwasveryeasytocatchfisharoundtheisland. D.Peopletherelovedeatingfish. 4Whatcanwelearnfromthelastparagraph? A.SomescientistshavestudiedthesamecasemuchearlierthanSueO'Connor. B.SomescientistsdoubtedSueO'Connor'sstudy. C.ItwasnoteasyforSueO'Connortocarryoutthestudy. D.TheresultofSueO'Connor^studyneededtobetestedindeepwater.
1分Nooneknowswhensuchacustomfirst. A.cameintopower B.cameintobeing C.cametrue D.cameout
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