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下列图象能正确反映有关变化的关系的是（ ）
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下列图象不能正确反映其对应变化关系的是
下列图象能正确反映其对应操作中各量变化关系的是
下列图象能正确反映加热氯酸钾和二氧化锰混合物制氧气时有关量随时间变化的是
下列图象能正确反映对应变化关系的是
下列图象能正确反映变化关系的是
下列四个图象能正确反映实验变化关系的有
下列图象能正确反映对应变化关系的是
A
B
C
D.
下列图象能正确反映对应变化关系的是
如图所示乙图中图象记录了单摆中摆球的动能势能随摆球位置变化的关系下列关于图象的说法正确的是
a图线表示势能随位置的变化关系
b图线表示机械能随位置的变化关系
c图线表示动能随位置的变化关系
图象表明摆球在势能和动能的相互转化过程中机械能不变
下列图象能正确反映对应变化关系的是
下列图象能正确反映对应变化关系的是
A
B
C
D
下列图象能正确反映对应变化关系的是
下列各图象能正确反映其对应变化关系的是
下列图象与描述不能正确反映其对应变化关系的是
下列4个图象中能正确反映变化关系的是
下列4个图象能正确反映对应变化关系的是
A
B
C
D
下列四个图象能正确反映对应变化关系的是
下列图象能正确反映对应变化关系的是
下列图象能正确反映其对应操作中各量变化关系的是
下列图象能正确反映其对应关系的是
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现定义一种变换对于一个由有限个数组成的序列S0将其中的每个数换成该数在S0中出现的次数可得到一个新序列S1例如序列S042342通过变换可生成新序列S122122若S0可以为任意序列则下面的序列可作为S1的是
WhenChristopherColumbuslandedonthethenunnamedCostaRicain1502hesawmanyIndianswearinggoldearrings.Sohethoughtthelandmustberichingold.HenamedtheplaceCostaRicawhichmeansrichcoastinSpanish. ThoughlittlegoldwasfoundCostaRicatodayisindeedrichwithcoffeeandbananas.CoffeeisthemostimportantproductinCostaRicaandmostofitisexportedtoothercountrieslikeAmericaandWestGermany.Bananasarethecountry'ssecondmostimportantexport. CostaRicansalsogrowmanyothercropssuchasfruitscornandbeansfortheirownuse.CostaRicanslovecolorsandtheirhousesarepaintedinbrightcolors. EducationisveryimportanttotheCostaRicans.Almosteveryvillagehasaschoolandeducationisamustforchildrenbetweensevenandfourteenyearsofage.Boysandgirlsgotoseparateschools.ClassesbegininMarchandendinNovember.Theotherthreemonthsoftheyearareharvesttimeandthechildrenhavetohelptheirparentstopickcoffeebeans. 1What'sthemainideaofthefirstparagraph? A.HowColumbusfoundCostaRica. B.HowCostaRicagotitsname. C.WhattheCostaRicanswore. D.WhatlanguagetheCostaRicansspoke. 2TheCostaRicansmayNOTpainttheirhouses. A.pinkandred B.greyandblack C.blueandgreen D.yellowandorange 3InCostaRicaboysandgirlsbetweensevenandfourteen. A.mustgotoschool B.studyinthesameschool C.donothavetogotoschoolatall D.canchoosetostopschoolingatanytime 4FromDecembertoFebruaryschoolchildreninCostaRica. A.havelessonseveryday B.havetheirexaminations C.helptheirparentspickcoffeebeans D.helptheirparentsdecoratetheirhouses 5Thispassageismainlyabout. A.ChristopherColumbus B.CostaRica C.someproductsfromCostaRica D.theeducationofCostaRic
如图在正方形ABCD和正方形DEFG中点G在CD上DE＝2将正方形DEFG绕点D顺时针旋转60°得到正方形DE'F'G'此时点G'在AC上连接CE'则CE'+CG'＝．
DirectionsWriteanEnglishcompositionin120﹣150wordsaccordingtotheinstructionsgivenbelowinChinese. 作为一名高中生你认为什么品质是你最需具备的?请通过一个事例来说明理由.
Somepeoplethinkthatsuccessisonlyforthosewithtalentorthosewhogrowupintherightfamilyandothersbelievethatsuccessmostlycomesdowntoluck.I'mnotgoingtosaylucktalentandcircumstancesdon'tcomeintoplaybecausetheydo.Somepeoplearebornintotherightfamilywhileothersarebornwithgreatintelligenceandthat'sjusttherealityofhowlifeis. Howevertosucceedinlifeonefirstneedstosetagoalandthengraduallymakeitmorepractical.Andinadditiontothatinordertogetreallygoodatsomethingoneneedstospendatleast10000hoursstudyingandpracticing.Tobecomegreatatcertainthingsit'llrequireevenmoretimetimethatmostpeoplewon'tputin. Thisisabigreasonwhymanysuccessfulpeopleadviseyoutodosomethingyoulove.Ifyoudon'tenjoywhatyoudoitisgoingtofeellikeunbearablepainandwilllikelymakeyouquitwellbeforeyoueverbecomegoodatit. Whenyouseepeopleexhibitingsomegreatskillsorhavingachievedgreatsuccessyouknowthattheyhaveputinahugepartoftheirlifetogetthereatahugecost.It'ssometimeseasytothinktheygotluckyortheywerebornwithsomeraretalentbutthinkingthatwaydoesyounogoodandthere'sahugechancethatyou'rewronganyway. Whateveryoudoifyouwanttobecomegreatatityouneedtoworkdayinanddayoutalmosttothepointofaddictionandoveralongperiodoftime.Ifyou'renotwillingtoputinthetimeandworkdon'texpecttoreceiveanyrewards.Consistenthardworkwon'tguaranteeyouthelevelofsuccessyoumaywantbutitwillguaranteethatyouwillbecomereallygoodatwhateveritisyouputallthatworkinto. 1Paragraph1mainlytalksabout. A.thereasonsforsuccess B.themeaningofsuccess C.thestandardsofsuccess D.theimportanceofsuccess 2InParagraph2theunderlinedwordthatrefersto. A.beinggoodatsomething B.settingapracticalgoal C.puttinginmoretime D.succeedinginlife 3Successfulpeoplesuggestdoingwhatonelovesbecause. A.workmakesonefeelpain B.onetendstoenjoyhiswork C.onegivesuphisworkeasily D.ittakesalotoftimetosucceed 4WhatcanweinferfromParagraph4? A.Successfulpeopleliketoshowtheirgreatskills. B.Peoplesometimessucceedwithoutluckortalent. C.Peopleneedtoachievesuccessatthecostoflife. D.Ithelpstothinkthatluckortalentleadstosuccess. 5Whatisthemainthemeofthepassage? A.Havingagoalisvitaltosuccess. B.Beinggoodisdifferentfrombeinggreat. C.Onecannotsucceedwithouttimeandpractice. D.Lucktalentandfamilyhelptoachievesuccess
It'sabighammertocrackanut.Thisishowoneangryparentdescribedtherecentcrackdown强制措施byLondonpoliceonparentswhodroptheirkidsoffatschoolbycar.Yesyoureadthatcorrectly﹣theverymodeoftransportationthatmanyAmericanschoolsinsististheonlysafewaytodeliverkidstoschoolisnowconsideredillegalintheUK. ThedecisiontofineanyvehiclesseendroppingofforpickingupkidswithinaparticularzoneofeastLondoncomesfromcitycouncilors'议员long﹣termeffortstomaketheareasaferandlesscrowded.Theysaythey'vebeentryingforyearstoencouragereasonableparkingbutinvain.Neighborhoodresidentscomplainfrequentlyabouttheirdrivewaysbeingblockedbyillegallyparkedcarsfor15minutesormoreoftenwhilethey'retryingtogettoworkandthestreetsarelongovercrowded. Nowtheruleshavechanged.Someparentsareangry.Angieisamotherwhomadethebighammercommentandsaysthecrackdowniswayoverthetop.Thenearestdrop﹣offpointforhersix﹣year﹣oldisnowafive﹣minutewalkfromtheschool.Othersarehappywiththedecisionseverethoughitmayseem. CouncilorJasonFrostsaidTraffichasclearlyreducedandmorechildrenarenowwalkingtoschoolwhichisagreatoutcome.Iwouldratherhavecomplaintsthatweareslightlyinconveniencingparentsthanhearthatachildhadbeenseriouslyinjuredbecausenothingwasdone. Iwitnessdailythechaos混乱createdbythesein﹣towndriverswhenIwalkmyownkidstoschool.There'saparkinglotcrowdedwithvehiclesandaslow﹣movingtrainofcarsmovingincirclesmanyfillingtheairwithharmfulsmokes.Meanwhiletheconversationsaroundchildover﹣weightandtheimportanceofdailyphysicalactivitycontinuetostandoutinschools. 1WhyisAngieopposedtothenewrule? A.SheisoftenfinedbyLondonpolice. B.Shewillloseherjobasaschooldriver. C.ShehasadaptedtotheAmericanpractice. D.Shethinksitaddsinconveniencetoherson. 2WhyhasthenewrulebeenmadeaccordingtoJasonFrost? A.Onaccountofmanycomplaints. B.Becauseofheavytrafficjams. C.Owingtosafetyconcern. D.Duetoairpollution. 3Whatcanbeseenafterthecrackdowniscarriedout? A.Lessdailychaos. B.Supportfromallpeople. C.Moreover﹣weightchildren. D.Complaintsfromneighbors. 4Whatisthemainideaofthetext? A.Parentsattempttoresistaschoolrule. B.Londonpolicecausewidespreadanger. C.Americanschoolscaremoreaboutkids'safety. D.Differentvoicesareheardonanewtrafficpolicy.
如图所示四边形ABCD是边长为4cm的正方形动点P在正方形ABCD的边上沿着A→B→C→D的路径以1cm/s的速度运动在这个运动过程中△APD的面积scm2随时间ts的变化关系用图象表示正确的是
ForRachaelandLeighBarmanthereisonlyonewishontheirChristmaslistthisyear﹣﹣﹣thattheirsickdaughterPaigeshouldsurviveuntilDecember25.Fifteen﹣year﹣oldPaigesuffersfrom1rarebraindisease2affects影响asfewas12peopleintheworldandcouldkillheranyday3warning警告. Andherconditionhasgoneeven4badinrecentmonths.HerparentsfilledthefamilyhomewithChristmasdecorations5September1stsoshecouldenjoytherestofherlife.Sincethenshehas6regularopenedChristmaspresentsandreceivedvisitors﹣﹣﹣butshesleepsforupto19hoursadayherparentsknowingthateachtimeshecloseshereyesshemayneverwakeup. MrsBarman7describedealingwiththeconditionaslikebeingondeathrowassheneverknewif8daughterwouldwakeupthenextmorning. ThemothersaidShealwayslovesChristmasandIgetmyheart9breakwhenIseehersufferinglikethisOurbestChristmaspresentwouldbehavingPaigewithusatChristmas.Nomatter10sheleavestheworldwemakesurethatsheisalwayshappy.
LastyearmybrotherandIwenttoMiamiforavacation.Someofmyfriendswhohadbeentherebeforesaid1wasawonderfulholidaydestination.Beforewewentwehadplannedformonthswhenthedaycamewewereready. Afterourplanelandedwewenttothehotel.Wehadmadeourreservationsixmonths2earlybutthemanatthefrontdesksaidtherehadbeenamistake.We3tellthatourroomshadn'tbeenreservedforthatweek4fortheweekafter.Ididn'tunderstand5thiswouldhappenandmycreditcardhadalreadybeencharged6thereservation.What'sworsethehotelhadbeenfullybooked.Whenwewerewonderingwhattodothemanagercameout.Shewas7surprisehelpful.SheapologizedforthemistakeandgaveusaspareVIProomon8topfloor.Wehadneverstayedinsuchanamazingroomandweweren'tchargedextra. ThenextdaymybrotherandIwenttothebeach9wewatchedsomepeopleplayvolleyball.Wegotalittle10sunburnbutthedayhadbeensorelaxingthatwedidn'tmind.
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.错误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. NowadaysmoreandmoreConfuciusInstitutesarebeingbuildingallovertheworldthatshowsourChineseculturehasbecomemorepopularthanever.OnonehandtheancientChinesecultureoncehadagreatinfluenceinotherculturesespeciallythoseofAsiancountry.OnotherhandourChinesecultureconstantdevelopedthroughoutthelonghistorythusmadeitmorecolorfulandmorebrilliant.ConfuciusInstitutesaregoodplaceswheretolearnabouttheChineseculture.Whoeverwanttoknowmoreaboutitmustspendmoretime.ThereforeheorshecannothaveagoodknowledgeoftheChineseculture.
我总是对那些在我失意时安慰我的人心存感激.grateful
解不等式组．把不等式组的解集在数轴上表示出来．
关于x的分式方程＝的解是．
他不感激他朋友们为他所做的牺牲把这视作是理所当然的.appreciate
如图是由四个直角边分别为3和4的全等的直角三角形拼成的“赵爽弦图”小亮随机的往大正方形区域内投针一次则针扎在阴影部分的概率是．
JonHoffmanwassittingataredlightwhenhesawamanrunoutofastorecarryingaplasticdonationjarfullofcash.DressedinplainclothesJonHoffmancaughtthemanandpressedhimagainstthehood引擎盖ofhiscar.ButHoffmanhadtroublecontrollingthethiefandtheygotintoastruggle. Thedetectivehasamilitarybackgroundandhesaidhethoughtthesuspectmusthaveamilitarybackgroundtoobecausehewasabletobreakawaysoeasilyalocalpolicespokespersonsaid. Thedetectivecalledoutforhelpasacrowdgathered.AmongthosewatchingwereHarveyandKirbytwodaylaborers. Harveydidwhathasbecomecommonthesedays﹣﹣﹣hetookouthisphonetoshootthevideo.IhatetosayitbutIthoughtthatthispolicemanwasdoingsomethingstupidHarveysaid.ButwhenheaskedforhelpIthoughtwelltherewouldn'tbeshootingifIgotoverthereintime.Harveyjumpedintoactionwhilehewasstillrecordingthevideo.SodidKirby. Harveycaughtholdofthesuspect'sarmswhileKirbyseizedhislegsandtheywereabletogetthesuspecttothegroundtohelpDetectiveHoffmanputthehandcuffs手铐on.saidthepolicespokesperson.The27﹣year﹣oldsuspectwaschargedwithresistingarrestandotheroffenses.Thecharityjarhestoleheldlessthan﹩50. I'vebeenonthewrongsideofthelawseveraltimesinmylifeHarveysaid.Itfeelsgoodtobeonthefightsideanddosomethingpositive. Afterthearrestthethreemengottoknoweachotheratalocalsteakhouse﹣﹣﹣Hoffman'streatasathankyou. 1WhatmadeHoffmancallforhelpwhenarrestingthesuspect? A.Hewasnotonduty. B.Hecouldn'tcontrolthesuspect. C.Heneededwitnessestosupporthim. D.Hewantedtopushthethiefintothecar. 2WhydidHarveyandKirbyrecordthesceneatthebeginning? A.Tofollowthefashion. B.Torecordthedetective'ssillyaction. C.Tokeeptrackofthecriminal. D.Toavoidbeinginvolvedintheincident. 3WhatcanbeinferredaboutHarvey? A.Hewasreadytobreakthelaw. B.Hewasoutofworkatthattime. C.Hehadagoodmilitarybackground. D.Hemighthavehadsomeillegaldeeds. 4WhatisHoffman'sattitudetowardsHarveyandKirby? A.Grateful. B.Prejudiced. C.Skeptical. D.Admirable.
IwastenwhenIfirstsatwithmygrandmotherbehindthecashier收银台inhergeneralstore.1Iquicklylearnedtheimportanceoftreatingcustomerspolitelyandsayingthnakyou. AtfirstIwaspaidincandy.2Iworkedeverydayafterschoolandduringthesummerandonweekendsandholidaysfrom8a.m.to7p.m.Myfatherhelpedmesetupabannkaccount.3 BythetimeIwas12MygrandmotherthoughtIhaddonesuchagoodjobthatthepromotedmetosellingcosmetics化妆品.Idevelopedtheabilitytolookcustomersdirectlyintheeye.EventhoughIwasjustakidwomenwouldaskmesuchthingsasWhatcolordoyouthinkIshouldwear?Itookarealinterestintheirquestionsandwasabletotranslatewhattheywantedintomakeup化妆ideas.4 Thejobtaughtmeavaluablelessontobeasuccessfulsalespersonyoudidn'tneedtobeaRocketscientist﹣youneededtobeagreatlistener.5expecttheyareNOlongerwomenpurchasingcosmeticsfrommeinsteadtheyarekidswhotellmewhichtoystheywouldliketoseedesignedanddeveloped. A.LaterIreceived50centsanhour. B.Beforelongsheletmesirtherebymyself. C.Iendedmysellingarecordamountofcosmetics. D.TodayIstillcarrythatlessonwithmeIlistentocustomers. E.Mygrandma'strusttaughtmehowtohandleresponsibility. F.SoonIfoundmyselflookingmorebeautifulthaneverbefore. G.WatchingmymoneygrowwasmorerewardingthananythingIcouldhavebought.
阅读材料设一元二次方程ax2+bx+c＝0a≠0的两根为x1x2则两根与方程系数之间有如下关系x1+x2＝﹣x1•x2＝．根据该材料填空已知x1x2是方程x2+6x+3＝0的两实数根则+的值为
Whileresidentsofwealthynationstendtohavegreaterlifesatisfactionnewresearchshowsthatthoselivinginpoorernationsreporthavinggreatermeaninginlife. ThesefindingspublishedinPsychologicalScienceajournaloftheAssociationforPsychologicalsciencesuggestthatmeaninginlifemaybehigherinpoorernations1greaterreligiosity笃信zōng jiāo .Ascountriesbecomericherreligionbecomesless2topeople'slivesandtheyloseasenseofmeaninginlife. Thusfarthewealthofnationshasbeenalmostalways3longevityhealthhappinessorlifesatisfactionexplainspsychologicalscientistShigehiroOishioftheUniversityofVirginia.Giventhatmeaninginlifeisanimportantaspectofoverallwell﹣beingwewantedtolookmorecarefullyatdifferential4correlates相关物andpredictorsformeaninginlife. OishiandcolleagueEdDieneroftheUniversityofIllinoisatUrbana﹣Champaign5lifesatisfactionmeaningandwell﹣beingbyexaminingdatafromthe2007GallupWorldPolla6surveyofover140000participantsfrom132countries.7answeringabasiclifesatisfactionquestionparticipantswereaskedDoyoufeelyourlifehasanimportant8ormeaning?andIsreligionanimportantpartofyourdailylife? Thedatarevealedsomeunexpected9 AmongAmericansthosewhoarehighinlifesatisfactionarealsohighinmeaninginlifesaysOishi.Butwhenwelookedatthesocietallevelofanalysiswefoundacompletely10patternoftheassociationbetweenmeaninginlifeandlifesatisfaction. WhenlookingacrossmanycountriesOishiandDienerfoundthatpeopleinwealthiernationsweremoreeducatedhadfewerchildrenandexpressedmoreindividualisticattitudescomparedtothoseinpoorercountries﹣allfactorsthatwereassociatedwithhigherlifesatisfactionbuta11lowersenseofmeaninginlife. ThedatasuggestthatreligiositymayplayanimportantroleResidentsofwealthiernationswherereligiosityislowerreported12meaninginlifeandhadhighersuicideratesthanpoorercountries. Accordingtotheresearchersreligionmayprovidemeaningtolifetotheextentthatit13peopletoovercomepersonaldifficultyandcopewiththestrugglesofworkingtosurviveinpooreconomicconditions OishiandDienerhopetoreproducethesefindingsusingmorecomprehensivemeasuresofmeaningandreligiosityandareinterestedin14countriesovertimetotrackwhethereconomic15givesrisetolessreligiosityandlessmeaninginlife. 1A.bymeansof B.asaresultof C.forthesakeof D.withregardto 2A.central B.ideal C.formal D.superior 3A.relatedwith B.combinedwith C.associatedwith D.representedwith 4A.models B.styles C.designs D.patterns 5A.investigated B.diagnosed C.explored D.exploited 6A.nationwide B.thorough C.complete D.large﹣scale 7A.Exceptfor B.Insteadof C.Ratherthan D.Inadditionto 8A.opportunity B.temptation C.purpose D.definition 9A.trends B.practices C.outlooks D.currents 10A.precious B.similar C.relevant D.different 11A.exactly B.significantly C.adequately D.partially 12A.better B.less C.more D.fewer 13A.allows B.requests C.reminds D.helps 14A.following B.chasing C.pursuing D.predicting 15A.priority B.profit C.prosperity D.potential
请写一篇吸烟危害的短文. 内容要点吸烟会导致许多疾病甚至一些危及生命的疾病. 吸烟不但对吸烟者自己有害也严重影响不吸烟者的健康. 据报道美国每年至少有32万人因吸烟而丧生.目前约有四千万人仍在吸烟. 可喜的是越来越多的人已认识到其危害开始戒烟. 青年学生不应该养成这一恶习如有这一习惯应尽早戒除.
FeaturedLasVegasHotels 1Wherecanfindthisinformation? A.Thetravelagency'sleaflet B.TheGlobalTravelerMagazine C.www.USAtour.com D.Advertisement 2Whichofthefollowingisnottrue? A.CircusCircusisthecheapestoneamongthefourhotels. B.LivinginVenetianResortHotelCasinoenablesyoutotraveltoVeniceforfree. C.Emmanuel.Mwasquitesatisfiedwithboththeenvironmentandthelocationofthehotelhelivedin. D.LuxorHotelandCasinohasaveryspecialappearance. 3Ifyoucarealotabouttheservicebuthaveatightbudgetwhichhotelwillyouchoose? A.LuxorHotelandCasino B.VenetianResortHotelCasino C.CircusCircusHotelandCasino D.PalaceStationHotel
如图水平地面上有一面积为30cm2的扇形AOB半径OA＝6cm且OA与地面垂直在没有滑动的情况下将扇形向右滚动至OB与地面垂直为止则点O移动的距离为
如图将两张长为5宽为1的矩形纸条交叉让两个矩形对角线交点重合且使重叠部分成为一个菱形．当两张纸条垂直时菱形周长的最小值是4把一个矩形绕两个矩形重合的对角线交点旋转一定角度在旋转过程中得出所有重叠部分为菱形的四边形中周长的最大值是
IwasneververyneatwhilemyroommateKatewasextremelyorganized.Eachofherobjectshaditsplacebutminealwayshidsomewhere.Sheevenlabeled贴标签everything.Ialwayslookedforeverything.OvertimeKategotnearerandIgotmessier.ShewouldpushmydirtyclothingoverandIwouldlaymybooksonhertidydesk.Webothgottiredofeachother. Warbrokeoutoneevening.Katecameintotheroom.SoonIheardherscreamingTakeyourshoesaway!Whyundermybed!DeafenedIsawmyshoesflyingatme.Ijumpedtomyfeetandstartedyelling.Sheyelledbacklouder. Theroomwasfilledwithanger.Wecouldnothavestayedtogetherforasingleminutebutforaphonecall.Kateansweredit.FromherendoftheconversationIcouldtellrightawayhergrandmawasseriouslyill.Whenshehungupshequicklycrawled爬underhercoverssobbing. Obviouslythatwassomethingsheshouldnotgothroughphone.Allofasuddenawarmfeelingofsympathyroseupinmyheart SlowlyIcollectedthepencilstookbackthebooksmademybedcleanedthesocksandsweptthefloorevenonherside.IgotsointomyworkthatIevendidn'tnoticedKatehadsatup. Shewaswatchinghertearsdriedandherexpressiononeofdisbelief.Thenshereachedoutherhandstograspmine.Ilookedupintohereyes.Shesmiledatme.Thanks. KateandIstayedroommatesfortherestoftheyear.Wedidn'talwaysagreebutwelearnedthekeytolivingtogethergivingin.cleaningupandholdingon. 1WhatmadeKateangryoneevening? A.Shecouldn'tfindherbooks. B.Sheheardtheauthorshoutingloud. CShegotthenewsthathergrandmawasill. D.Shesawtheauthor'sshoesbeneathherbed. 2Theauthortidieduptheroommostprobablybecause. A.shewasscaredbyKate'sanger B.shehatedherselfforbeingsomessy C.shewantedtoshowhercare D.shewasaskedbyKatetodoso 3HowisParagraphImainlydeveloped? A.Byanalyzingcauses. B.Byshowingdifferences. C.Bydescribingaprocess. D.Byfollowingtimeorder. 4Whatmightbethebesttitleforthestory? A.MyFriendKate B.HardWorkPaysOff C.HowtoBeOrganized D.LearningtoBeRoommates
Someoftheworld'smostsignificantproblemsneverhitheadlines.Oneexamplecomesfromagriculture.Foodriots暴乱andhungermakenews.Butthetrendlyingbehindthesemattersisrarelytalkedabout.Thisisthedeclineinthegrowthinyields产量ofsomeoftheworld'smajorcrops.AnewstudybytheUniversityofMinnesotaandMcGillUniversityinMontreallooksatwhereandhowfarthisdeclineisoccurring. Theauthorstakeavastnumberofdatapointsforthefourmostimportantcropsricewheatcornandsoybeans.Theyfindthatonbetween24%and39%ofallharvestedareastheimprovementinyieldsthattookplacebeforethe1980ssloweddowninthe1990sand2000s. Therearetwoworryingfeaturesoftheslowdown.Oneisthatithasbeenparticularlysharpintheworld'smostpopulouscountriesIndiaandChina.Theirabilitytofeedthemselveshasbeenanimportantsourceofrelativestabilitybothwithinthecountriesandonworldfoodmarkets.Thatself﹣sufficiencycannotbetakenforgrantedifyieldscontinuetoslowdownorreverse. Secondyieldgrowthhasbeenlowerinwheatandricethanincornandsoybeans.Thisisproblematicbecausewheatandricearemoreimportantasfoodsaccountingforaroundhalfofallcaloriesconsumed.Cornandsoybeansaremoreimportantasfeedgrains.Theauthorsnotethatwehavepreferentiallyfocusedourcropimprovementeffortsonfeedinganimalsandcarsratherthanoncropsthatfeedpeopleandarethebasisoffoodsecurityinmuchoftheworld. Thereportqualifiesthemoreoptimisticfindingsofanothernewpaperwhichsuggeststhattheworldwillnothavetodigupalotmorelandforfarminginordertofeed9billionpeoplein2050astheFoodandAgricultureOrganizationhasargued. Insteaditsaysthankstoslowingpopulationgrowthlandcurrentlyploughedupforcropsmightbeabletoreverttoforestorwilderness.Thiscouldhappen.Thetroubleisthattheforecastassumescontinuedimprovementsinyieldswhichmaynotactuallyhappen. NoteAnswerthequestionsorcompletethestatementsinNOMORETHANTWELVEWORDS. 1Thetrendlyingbehindfoodriotandhungeris. 2WhydoestheauthormentionIndiaandChinainparticular? 3Accordingtothenewstudywhat'stheproblemoftherecentcropimprovementefforts? 4Whatistheauthor'sattitudetotheargumentoftheFoodandAgricultureOrganization?
Asweallknowfriendshipisofgreatimportanceinourdailylife.Afriendcangiveushelpandshareourdifficultiesandhappiness.Buthowtomakefriendsisstilldifficulttosomeofus.1 1.Befriendlytoothers.2Youshouldtrytomakeastrangerfeelathomewhereverhehappenstobe.Thinkmoreofothersthanofyourselfandneverjudgeapersonbyhisappearanceandclothes. 2.Bereliable.Ifyouandyourfriendagreetomeetsomewheredon'tbelate.Ifyou'renotgoingtomakeitontimeormakeitatallcallthemassoonasyourealizeit.3Besomeonethatpeopleknowtheycandependon. 3.4Listencarefullytowhatpeoplesayrememberimportantdetailsaboutthemtheirnamestheirlikesanddislikesaskquestionsabouttheirinterestsandjusttakethetimetolearnmoreaboutthem. 4.EncourageyourfriendsAtruefriendalwaysgivescouragetohisfriends.5Nevermakefunoforlaughatyourfriendsinfrontofothers.Youshouldcometosupportthem. A.Whenyousayyou'lldosomethingdoit. B.Afriendtoallisafriendtonone. C.Beagoodlistener. D.Thefollowinginformationcangiveyousometips E.Smileatothersandyouaresuretogetasmileinreturn. F.Hewillremainwiththeminbothgoodaswellasbadtimes. G.Andneverleaveyourfriendwhenheisintrouble.
MyAmericanfriendkindlyinvitedmetoherhometocelebratethisyear'sThanksgivingDay.I1experiencemyfirsteverThanksgiving. OnthatdaywewatchedtheThanksgivingparade游行inNewYorkCityonTV.Myfriend'sfamilysat2frontofthetelevision.TheycamefromallovertheStatesandenjoyedbeingtogether.3lookattheirhappyfacesIthoughtitwasreallyaholidayforfamiliesjustliketheMid﹣AutumnFestivalinChina. ThateveningwehadabigThanksgivingdinner.This4traditionmealincludesroastturkeymashedpotatoesandassortedvegetables.Whenthedishesandplatesarrivedatthetablewestartedtotake5turntosaythethingswewere6thankfor.ThisinfactisaThanksgivingtraditionmanyfamiliespracticeintheUS. Thenthefood7passaroundthetableandweallatefartoomuch.Ialsohaddessertswithmydinner.There8bedifferentkindsofpiessuchasapplepiespumpkinpiesandcoconutpies. IfonementionsThanksgivingonemusttalkaboutBlackFridaytheFriday9followsThanksgivingDay.ShopsacrosstheUnitedStateswillgivetheir10bigsalesofthewholeyearonBlackFriday.Manypeoplegocrazyaboutit.Isawmanylongqueuesoutsidetheshopsonthatday.
如图在Rt△ACB中∠C＝90°AC＝3cmBC＝4cm以BC为直径作⊙O交AB于点D． 1求线段AD的长度 2点E是线段AC上的一点试问当点E在什么位置时直线ED与⊙O相切请说明理由．
FromchildhoodMoiralovedtowrite.Throughoutschoolshe1writingbutpursuing追求it2wasneverapossibility.Herfatherwasadoctorhermotheranurse.Medicinewasafairly3choiceMoirasaysAndwritingwasacareerwhereitwasn'ta4thatyou'dhavehighincome. Shebecameadoctorbutstillwantedtodosomewriting.Howeverbeingadoctorwasso5thatshedidn'ttakeupwritinguntilherthirties.She6anovel﹣afictionalizedversionofhertravelinChinaafteruniversity.Shegotexcellent7.Moirasentitoffasmanyagentsasshecouldfindandfoundonewhowantedto8her.Suddenlyitseemedshewasonher9asanauthor. Ihadonelengthyphonecallwiththeagentwherewe10allpossibleareasshethoughtneeded11.Iworkedonthoseandsentitbacktoherbutdidn'thearanything.Itwasn'tlong12Moirafoundanotheragentwhowas13ifshewaswillingtorewriteitfromthefirstpersontothethirdperson.Shedidthehardworkandsentitoffagain.Igotbackareallybriefletter‘ThankyouI'mnolongerinterested.'Itwasreally14. AdecadewentbyandMoirafoundherselfeagertowriteagainthistime15forherownenjoyment.She16herselfthechallengeofcreatingathrillerandchoseWesternAustraliaashersetting. Asshewaswritingjustforherselfsomethingsurprisingbegantohappen.Thecharacters17alifeoftheirowntheystarteddoingthingsIhadn'tthoughtabout.Itjust18out.OnedayanagentcalledfromAustralia.ThreeweekslaterMoirahadapublicationdeal.HernovelCicadawaspublishedinMarch. 19ithadn'tbeenpublishedIstillgainedsomuchfromthe20saysMoira. 1A.learnt B.avoided C.considered D.enjoyed 2A.actively B.professionally C.energetically D.permanently 3A.influential B.clear C.terrible D.safe 4A.dream B.purpose C.choice D.certainty 5A.promising B.discouraging C.demanding D.interesting 6A.produced B.introduced C.bought D.received 7A.rewards B.readers C.reviews D.praises 8A.employ B.represent C.trust D.guide 9A.own B.feet C.way D.business 10A.tookoff B.wentthrough C.pulleddown D.cameover 11A.deleting B.adapting C.polishing D.covering 12A.before B.after C.since D.when 13A.fascinated B.interested C.anxious D.amused 14A.common B.absurd C.terrifying D.disappointing 15A.purely B.wonderfully C.instantly D.sadly 16A.set B.found C.made D.permitted 17A.putup B.tookon C.wentover D.gotdown 18A.flew B.brought C.broke D.carried 19A.Eversince B.Asif C.Ifonly D.Evenif 20A.adventure B.practice C.process D.result
ItwasavillageinIndia.Thepeoplewerepoor.Howevertheywerenotunhappy.Afteralltheirforefathershadlivedinthesamewayforcenturies. Thenonedaysomevisitorsfromthecityarrived.Theytoldthevillagersthereweresomepeopleelsewherewholikedtoeatfrog'slegs.Howevertheydidnothaveenoughfrogsoftheirownandsotheywantedtobuyfrogsfromotherplaces. Thisseemedlikemoneyfornothing.Thereweremillionsoffrogsinthefieldsaroundandtheywerenousetothevillagers.Alltheyhadtodowascatchthem.Agreementwasreachedandthechildrenweresentintothefieldstocatchfrogs.Everyweekatruckarrivedtocollectthecatchandhandoverthemoney.Forthefirsttimethepeoplewereabletodreamofabetterfuture.Butthedreamdidn'tlastlong. Thechangewashardlynoticedatfirstbutitseemedasifthecropswerenotdoingsowell.Moreworryingwasthatthechildrenfellillmoreoftenandthereseemedtobemoreinsectsaroundlately. Thevillagersdecidedthattheycouldn'tjustwaittoseethecropsfailingandthechildrenhavetousethemoneyearnedtobuypesticides杀虫剂andmedicines.Soontherewasnomoneyleft. Thenthepeoplerealizedwhatwashappening.Itwasthefrog.Theyhadn'tbeenuseless.Theyhadbeendoinganimportantjob﹣eatinginsects.Nowwithsomanyfrogskilledtheinsectswereincreasingmorerapidly.Theyweredamagingthecropsandspreadingdiseases. Nowthepeoplearestillpoor.Butintheeveningstheysitinthevillagesquareandlistentosoundsofinsectsandfrogs.Thesesoundsofthenightnowhaveamuchdeepermeaning. 1Fromparagraph1welearnthatthevillagers. A.workedveryhardforcenturies B.dreamedofhavingabetterlife C.werepoorbutsomewhatcontent D.livedadifferentlifefromtheirforefathers 2Whydidthevillagersagreetosellfrogs? A.Thefrogswereeasymoney. B.Theyneededmoneytobuymedicine. C.Theywantedtopleasethevisitors. D.Thefrogsmadetoomuchnoise. 3Whatmightbethecauseofthechildren'ssickness? A.Thecropsdidn'tdowell. B.Thereweretoomanyinsects. C.Thevisitorsbroughtindiseases. D.Thepesticideswereoverused. 4Whatcanweinferfromthelastsentenceofthetext? A.Happinesscomesfrompeacefullifeinthecountry. B.Healthismoreimportantthanmoney. C.Theharmonybetweenmanandnatureisimportant. D.Goodolddaywillneverbeforgotten.
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