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如图26-Z-5，点A，B的坐标分别为（1，4）和（4，4），抛物线y=a（x-m）2+n的顶点在线段AB上运动，与x轴交于C，D两点（点C在点D的左侧），点C的横坐标最小值为-3，则点D的横坐标最...
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如图点AB的坐标分别为14和44抛物线y=ax﹣m2+n的顶点在线段AB上运动与x轴交于CD两点C
如图一条抛物线与x轴相交于AB两点其顶点E在线段CD上移动若点CD的坐标分别为﹣1444点B的横坐
B两点，其顶点E在线段CD上移动，若点C．D的坐标分别为（﹣1，4）．（4，4），点B的横坐标的最大值为6，则点A的横坐标的最小值为（ ）
A．2
0
﹣2
﹣3
如图点
，
的坐标分别为（1,4）和（4, 4）,抛物线
的顶点在线段AB上运动，与x轴交于
D.两点（C.在
的左侧），点C.的横坐标最小值为
，则点D.的横坐标最大值为( )
A.－3 B.1C.5D.8
如图点AB的坐标分别为14和44抛物线y=ax﹣m2+n的顶点在线段AB上运动与x轴交于CD两点C
7
8
9
10
如图在平面直角坐标系中点
B.C的坐标分别为（1，4）、（5，4）、（1，﹣2），则△ABC外接圆的圆心坐标是（ ）
A.（2，3）
（3，2）
（1，3）
（3，1）
如图一条抛物线与x轴相交于
B.两点，其顶点P.在折线C.－D.－E.上移动，若点C.D.E.的坐标分别为（-1，4）、（3，4）、（3，1），点
的横坐标的最小值为1， 则点A.的横坐标的最大值为（ ） A.1B.2
3
4
如图在平面直角坐标系中以P.46为位似中心把△ABC缩小得到△DEF若变换后点A.B.的对应点分别为
某宗地丘有5个界址点其坐标分别为J151J261J344J422J531则该宗地的面积数值为____
13.5
7.5
6.5
14.5
如图点AB的坐标分别为14和44抛物线y＝ax﹣m2+n的顶点在线段AB上运动与x轴交于CD两点C
某宗地丘有5个界址点其坐标分别为J151J261J344J422J531则该宗地的面积数值为
6.5
7.5
13.0
15.0
如图点AB的坐标分别为14和44抛物线y=ax﹣m2+n的顶点在线段AB上运动抛物线随顶点一起平移与
﹣3
1
5
8
如图在直角坐标系中点A.B.的坐标分别为14和30点C.是y轴上的一个动点当最大时点C.的坐标是__
如图点AB的坐标分别为14和44抛物线y=ax-m2+n的顶点在线段AB上运动与x轴交于CD两点C
-3
1
5
8
如图点AB的坐标分别为14和44抛物线y=ax﹣m2+n的顶点在线段AB上运动与x轴交于CD两点C
如图点AB的坐标分别为14和44抛物线y=ax﹣m2+n的顶点在线段AB上运动抛物线随顶点一起平移
﹣3
1
5
8
如图在直角坐标系中点A.B的坐标分别为14和30点C是y轴上的一个动点且A.B.C三点不在同一条直线
如图□ABCD的顶点坐标分别为
(1，4)、
(1，1)、
(5，2)，则点
的坐标为（ ） A.(5，5)B.(5，6)C.(6，6)D.(5，4)
如图在平面直角坐标系中点ABC的坐标分别为14541－2则△ABC外接圆的圆心坐标是
(2，3)
(3，2)
(1，3)
(3，1)
如图26-Z-4点AB的坐标分别为14和44抛物线y=ax-m2+n的顶点在线段AB上运动与x轴交于
△ABO的顶点坐标分别为A-14B32O00试将△ABO放大为△EFO使△EFO∽△ABO且位似比为
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折线统计图不能反映各种数量的多少．判断题
一种小汽车原价12万元现价9万元降低了%
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﹨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. TwomonthsagomymotherandIwerewalkinghomefromshoppingwhilewenoticedasmalldoglyingsillonthemiddleoftheroad.Howdangeritwas!Wegotcloselytohimandfoundthathewasbadlyinjured.Sawthepoordogwedecidedtohelphim.Immediatelywecalledataxiandsendhimtoananimalhospitalwherehewasexaminedandreceivedtreatment.Afterstayinginhospitalforfewdayshebecamegoodenoughtowalk.Thenwetookhimhomeandlookedafterhimcarefullyuntilhewasfullyrecovered.Nowheisalreadyanimportantmemberofourfamilyandbringsourselvesalotofhappiness.
25%==20＝填小数
假如你是李华你的笔友Tom正在学汉语发来邮件询问如何提高汉语水平请你根据提示用英语给Tom回复. 提示:1.关注语音语调四个声调; 2.背诵经典; 3.写日记; 4.其他. 注意:1.词数100左右; 2.可以适当增加细节以使行文连贯. 提示词:语调intonation声调tone经典作品classics DearTom Sincerely LiHua
深圳市某风景点近几年来游客人数统计图．2000年的游客人数比1998年增长%2002年的游客人数比2000年增长%．
解方程
You'11finditamazingtosupportpeoplewhenyougoouttoeat!Justlookforrestaurantsthathirepeoplewithdisabilitieswhicharemakingtheworldamoreinclusiveplace.Eachbakerycaféandrestaurantbelowhasawonderfulandheartwarmingstory. HugsCare:McKinneyTexas RuthThompsononcehadavisiontocreateanonprofitcaféthatwouldberunandoperatedprimarilybyadultswithspecialneeds.WithhardworkastrongpassionandanamazingteamHugsCaféopeneditsdoorsin2015.HugsCaféisnowsomuchmorethanajobtoour23teammateswhichisenhancingthemeaningfullivesofadultswithspecialneedsthroughtrainingandemploymentatHugsCafé.Thompsonsays. Vinny&Bay'sCoffeeandEatery:PanamaCityFlorida AlotofpeopleplantheirvacationsaroundcomingtothiscoffeeshopsayscaféownerKaraRigby.Vinny&Bay'sCoffeeandEaterywasestablishedsothatBayleehadaplacetoworkRigbyadds.BayleeisRigby'sdaughter'sfriendwhohasadisability.Thecoffeeshop'sgoalbecometrainingforindividualslikeBaylee.SomeworkershaveevenstartedatVinny&Bay'sandwereabletoworkinaregularworkplace.Rigbysaysthatheremployeeshaveawholelotmoreabilitiesthandisabilities.Theyloveunconditionallyanditchangesthewholeenvironmentandbusiness.Rigbybelievesthatincorporatingevenjustoneortwodisabledindividualsintoabusinesscanchangethewholeatmosphere﹣forthebetter! SugarPlumBakery:VirginiaBeachVirginia HeadtoSugarPlumBakerytofindadeliciouscarrotcakeandseepeoplewithdisabilitiessuccessfullyworkingalongsidenon﹣disabledworkers.SugarPlumhasbeenpromotingtheintegrationofadultswithdevelopmentaldisabilitiesbyprovidingtrainingandemploymentopportunitiestomorethan1000peoplewithdisabilitiessince1987.Whetherthey'rescoopingcookiesormakingcupcakesSugarPlum'sdisabledemployeesarethebackboneofthebakery. 1Whatdothethreerestaurantshaveincommon? A.Theyareestablishedbyadultswithspecialneeds. B.Theyaresupportedbycharitiesorlocalgovernment. C.Theyprovidetrainingandemploymenttodisabledindividuals. D.Theemployersandemployeesthereareallindividualswithdisabilities. 2Itcanbeknownfromthepassagethat. A.HugsCafésetupin1987nowhas23teamates B.RigbyfoundedhercoffeeshoptohelpBayleeherdaughter C.Disabledindividualsarenotabletoworkinaregularworkplace D.SugarP1umBakeryhiresbothnormalpeopleandpeoplewithdisabilities 3Whatdoestheunderlinedsentenceinthelastparagraphsuggest? A.Disabledworkerstherearethemostimportantpart. B.Thebakerygetssupportandstrengthfrombackbone. C.Thecustomersarealwaysbackingthedisabledworkers. D.Theemployeeshaveawholelotmoreabilitiesthandisabilities.
在绘制一幅条形统计图时如果用2厘米长的直条表示80千克那么5厘米的直条就表示千克的重量．
最简单整数比就是比的前项和后项只有公约数1．判断题
解方程 2x+3-51-x=3x-1
TheThingsThatKeepUsFromSucceeding Wehavealwaysbeentoldnottofearfailurebecauseitisessentialtosuccess.Soweshouldembracefailureoratleastthepossibilityoffailure.1.Ifyou'renotreachingthekindofsuccessyouimagineoneormoreofthefollowingthingsmightwellbetrueofyoutoo. NO.1:Youdon'thaveagoal.Atotoftimewefindourselvesstrugglingthroughaday﹣to﹣dayroutinethatisn'tgettingusanywherebecausewedon'tknowwherewewanttogo.Sometimeswehadgoalswhenwesetourselvesonaparticularpathbutwe'vechangedalongthewayandthosegoalsarenolongerthatimportant.2figuringoutwhatyourgoalsareisimportant. NO.2:Youdon'thaveavision.Settinggoalsisimportantbutisn'tenoughtodriveyoutothefinishline;it'simportanttootobeabletoimagineyourselfastheachieverofyourgoals.Ifgoalsaretheendresultofajourneyyourvisionisthefueltogetyouthere. NO.3:Youdon'thaveaplan.Ifgoalsareyourdestinationandavisionisyourfuelyourplanisthemaptogetyouthere.3.Theworldisfullofpeoplewithgoalstheyhaveneveraccomplishedbecausetheydidn'thaveaplan﹣don'tbeoneofthem. NO.4:You'retoocertainornotcertainenough.Toomuchcertaintycreatesinflexibility.Ifyou'resurethatyourplaniscorrectandrefusetoacceptthepossibilityoferroryoumaywellfindyourselfstuckwhenanunexpectedchangecomesabout.Howeverstrongyourplanandhoweversureyouareofyourgoalsmakeroomforperiodicreassessment. 4.Ifyourefusetotakeastepbecauseyouaren'tpositivethatitwillmoveyoutowardssuccessyouwon'tmakeanybetterprogressthanifyouhadnogoalsatall.Keepyoureyesopenandbewillingtochangebuthavefaithinyourselftoo. NO.5:5.Oftenwecloseourselvesofffromotherpeoplenotbecausewe'reafraidthattheywillinfluenceusbutthatwewillinfluencethem.Weareafraidthatourbrilliantideaswillbetakenupbysomeoneelseandnolongerbesolelyours.Soweavoidsharingourpassionsandspendourenergyjealouslyguardingoursecretratherthansimplymovingforward.Intheendweturnourpassionsintoburdensthataredifficulttocarryinsteadofajoy. A.Whateverthecase B.Whateverthecause C.Youworryaboutbeingcopied D.Youdon'tlearnfromyourmistakes E.Atthesametimetoolittlecertaintywillfailyou F.Howeverfearisn'ttheonlythingthatkeepsusfromsucceeding G.Withoutityouhavenoideawhatimmediatestepstotaketoachieveyourgoals
Whataredreamsfor?Ahandfuloftheorieshavethemostinfluence.SigmundFreudfamouslyclaimedthattheyrevealhiddentruthsandwishes.DespitebeinglargelyunsupportedbyevidenceresearchersfoundthatstudentsintheU.S.SouthKoreaandIndiaweremuchmorelikelytoaccepttheview.Inthesamestudyrespondentssaidthatdreamingaboutaplanecrashwouldcausethemmoreanxietythananofficialwarningaboutaterroristattack.Morerecentresearchsuggeststhattheymayhelpusprocessintenseemotionsorperhapssortthroughandstrengthenmemoriesorrehearseresponsestothreateningsituations. Evenifdreamscan'tforetellthefuturetheyseemtoexposeoursharedfascinations.ThemajorityofdreamsoccurduringREMsleepcyclesofwhichtheaveragepersonhasfourorfiveanight.AstudyofCanadianuniversitystudentsfoundthemostcommondreamtopicstobeschoolfallingbeingchasedandarrivingtoolateforsomething. Forallthecommonalitiesdreamsexhibittheyvaryacrosstimepeoplewhogrewupwatchingblack﹣and﹣whiteTVaremorelikelytodreaminblackandwhite﹣andculture.A1958studydeterminedthatcomparedwithJapanesepeopleAmericansdreamedmoreaboutbeinglockeduplosingalovedonefindingmoney.Japanesepeopleweremorelikelytodreamaboutschooltryingrepeatedlytodosomethingbeingparalyzedwithfearorwildviolentbeasts. Ifhumandreamssoundboringbearinmindthatevennegativeonescanhavepositiveeffects.InastudyofstudentstakingaFrenchmedical﹣schoolentranceexam60percentofthedreamstheyhadbeforehandinvolvedaproblemwiththeexamsuchasbeinglateorleavingananswerblank.Butthosewhoreporteddreamsabouttheexamevenbadonesdidbetteronitthanthosewhodidn't. 1WhatdoyouknowaboutFreud'sviewondreaming? A.Itwillcausepeoplemoreanxiety. B.It'salreadybeenprovedbyevidence. C.It'spopularwithsomeAmericanandAsianstudents. D.Itcanrevealthehiddentruthandpredictthefuture. 2Accordingtorecentresearchdreamsmay. A.makeemotionsintense B.helpprepareforspecialsituations C.reduceourmemories D.helpustakenotes 3Accordingtoparagraphs2and3whichofthefollowingistrue? A.Theaveragepersonhasfourorfivesleepcyclesanight. B.Canadianstudentsaren'tworriedaboutbeinglateforschoo1. C.AmericansusuallysharethesamedreamtopicswithJapanese. D.FilmsaboutwildbeastsmaybewidelyshowninAmericain1958. 4Ifyoudreamthatyoufailedtheexam. A.yourdreamwillcometrue B.you'llbedepressedwithfear C.youaresupposedtotakeitseriously D.itshowsthatyoucarealotabouttheexam
化简比．1
解方程
一班和二班人数比54已知二班48人一班和二班一共有多少人
求比值．千米500米
假定你是李华你的美国朋友Tom听说在中国通过扫描二维码scanQRcode就可以轻松实现移动支付mobilepayment感到不可思议.请你写封邮件告知移动支付在中国的相关情况.内容包括: 1.在中国最流行提供了便利. 2.快捷且强大的功能:如买早餐买地铁票. 3.改变我们的生活引领世界. 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯. DearTom Yourssincerely LiHua
解方程
ForKimDuffysendingawayherteenagedaughterwasthebesthopeforsavingthegirl'slife. Corinnethen17hadbeenstrugglingwithbulimia贪食症andanorexia厌食症formorethanfiveyears.DuffyandherhusbandTerryfoundaresidentialfacilityinVirginiaandCorinnesignedonforatwo﹣monthstayinthesummerof2009. TodayCorinne'shealthyandpursuingamaster'sdegreeinColorado.Sheandherparentsbelievetheholistic整体approachandindividualizedfocuswerekeytoherrecovery.Andtheyknowtheyhadaccesstouniqueresources.WewerefortunatesaysDuffy.Wecouldpayforeverything. Butmanycan't.AccordingtoareportreleasedinNovember2014bytheStandingCommitteeontheStatusofWomenbetween600000andonemillionCanadianssufferfromaneatingdisorder.Publicinpatientprogramsoftenwon'tadmitpatientsuntilthey'reinlife﹣threateningcondition.Privateclinicsoftenhavealongwaitlistsandhighcosts﹣atHomewoodinGuelphOnt.aroomis﹩305to﹩360perday. TheDuffs'struggleledthentoconnectotherfamilieswiththequalityofcaretheyreceivedintheUnitedSates.Inlate2013heyfoundedtheWaterStoneClinicaprivateeatingdisordercenterinToronto. Sincethefacilityopened170clientshavereceivedtreatment.Theytakeyogadoarttherapyandparticipateinmealpreparationbuildingreal﹣lifeskillswithasupportteam.Programsrunweekdaysfrom8a.m.to2p.m.andnotablysofarWaterStonehasnowaitinglist. Butthisapproachiscostly:approximatelyS650perday.RealizingthatthepricetagputsWaterStoneoutofreachformanytheDuffyscreatedtheWaterStoneFoundation﹣acharitythatprovidesaidtopatientswhocan'taffordtreatmentthefollowingyear.Candidatesareassessedbywocommitteesthatmakeadecisionbasedonclinicalandfinancialneed.Since2014thefoundationhashelped100people. Duffyalsowantstochangethepublicsystem.InJuneofthisyearthefoundationawarded＄170000tofourOntariohopitalsofferingcreativetreatmenttoeatingdisorderpatients.Yespeopleneedprivatetreatmentshesaysbutit'simportanttohelpoutonabroaderscaletoo. 1WhydidDuffythinktheywerefortunate? A.Theyhadenoughmoneytoravelabroad. B.Theycouldaffordthemedicalresources. C.Theyhappenedtofindarighthospital. D.Theymetveryexperienceddoctors. 2WhatcanweinferfromParagraph3? A.Publichospitalscannottreatpatientswitheatingdisorder. B.ManypeoplediefromeatingdisorderinCanadianpublichospitals. C.Alotofeatingdisorderpatientshavenoaccesstopropertreatment. D.Inprivateclinicseatingdisorderpatientswillreceivetimelytreatment. 3WhichofthefollowingpatientswillreceivehelpfromWaterStoneFoundation? A.Pooroneswhosufferfromthedisease. B.Oneswhoarerejectedbypublichospitals. C.Oneswhoarefacingdeath. D.oldoneswhoarepoor. 4WhatdoweknowfromDuffy'swordsinthelastparagraph? A.Onlyprivateclinicscangivepropertreatmenttothepatients. B.Treatmentofthediseaseinpublichospitalsshouldbeimproved. C.Shewantstocooperatewithpublichospitalstohelpthepatients. D.Publichospitalsshoulddomoretohelppeoplewitheatingdisorder.
Anewstudyfrombrainresearchershelpsexplainhowthehumanbrainevolvedorchangedovertimetopermitpeopletospeakandwrite. MichaelUllmantheleadresearcheraprofessoratGeorgetownUniversityMedicalSchoolinWashingtonD.Chasbeenstudyinglanguagelearningformorethan20years. Ullmansayshisresearchshowsthatthehumanbraindoesnothaveaspecialareaorsystemformakinglanguage.Overtimewehavesimplyreusedorco﹣opted指派partsofourbrainforlanguage.Andthosepartshesaysareancient﹣oldereventhanhumansthemselves. Thisstudyexaminesthetheoreticalframework准则thatlanguageislearnedstoredand'processedintwoancientlearningandmemorysystemsinthebrain. UllmanHamrickandtherestoftheteamlookedatdatafrom16otherstudiesonlanguage.Theyfoundthatpeoplelearnlanguageusingtwomemorysystems:declarativeandprocedural.Memorizingvocabularyforexampleisadeclarativememoryprocess.Butlearninggrammarismostlyaproceduralmemoryprocess. Declarativememoryinhumansatleastiswhatwethinkofaslearningmemory'suchas'Ohrememberwhatyousaidlastnight'orthingslikethat.Andproceduralmotormemoryiswhatweoftencallmotormemory'suchashowyoulearntorideabicycle.OrUllmanaddsTheseproceduralmemoryskillsbecomesodeeplyleanedthatwearenolongerawarethatwearedoingthem. HoweverUllmanexplainsthatthetwolong﹣termmemorysystemscansharetasks.Andheadstheadultbrainusesthesystemstolearnlanguageabitdifferentlythanachild'sbrain. Adultlanguagelearnersofasecondlanguagemayusetheirdeclarativememoryforusinggrammarpatterns.Theythinkaboutitpurposefully.Forachildthegrammarmaycomemorenaturally.Theydon'thavetothinkaboutthegrammarrulesbeforespeaking. InadditiontolanguagelearnersUllman'sstudycouldhelppeoplewhohaveabraininjurythataffectsspeakingandwriting.Thisknowledgecanalsohelpthosewhohavelearningdisabilitiessuchasdyslexia阅读障碍.Peoplewithdyslexiahavedifficultyrecognizingwordsandsymbolsaccurately. 1HowdidUllmanstudyhuman'smemorysystems? A.Byexaminingthebrainwithhisteam. B.Bystudyinglanguagelearningoveryears. C.Bycomparingdifferentlanguagesyearafteryear. D.Byreferringtodatafromotherstudiesonlanguage. 2Whichofthefollowingisanexampleofmotormemory? A.Learningtomakeamodelplane. B.Rememberingthegrammarpatterns C.Repeatingwhatyouheard. D.Memorizingwhatyouread. 3Whatdoestheunderlinedworditreferto? A.Declarativememory. B.Anadultlanguagelearner. C.Usinggrammarpatterns. D.Asecondlanguage. 4What'sthemainideaofthetext? A.Humanhasadvancedourlanguageunderstanding. B.Anewresearchhelpspeoplelearnanewlanguage. C.Learningmemoryismoreactivethanmotormemory. D.Humanbeingslearnlanguageinprehumanareaofbrain.
解方程x-0.4=x+0.3
IhadstoppedtogetgasataplacewhereIalmostnevergo.Ihad1aboutcleaningmywindshield挡风玻璃.Butthenwhenthegas2wasalmostfinishedIdecidedforsomereasonto3andcleanit.That'swhatIwasdoingwhenawomanapproachedmeandaskedfor4. Thereweretwowomenonemiddleagedtheothertwenty﹣something5ayoungchildinthebackseat.Onadaywhenthetemperaturewaswellpast100theywere6inanoldcarwithnoairconditioningdrivingfromatownaboutanhouraway. CanyoutellushowtogettoMopacsir?Shehadafolded﹣upprintoutofdirectionsfromGooglemaps.Sure.WhereonMopacareyou7?Iasked.Sheunfoldedtheprintoutandshowedmethe8.Iknewitwellandstartedtogetthe9thatthismomentwasmeanttohappen.Iknow10wherethatis.Itoldher.Iusedtohavean11inthatbuildingtoworkin. I12givingdirectionstotheolderladyandthenagaintoher13whowasthedriver.IttookawhilebecauseI14eachinstructiontomakesuretheyunderstood.Inasinceremomentof15theolderladythankedme. Thewhole16helpedmemuchmorethanithelpedher.Ihadbeenhavingavery17day.InfacttheonlyreasonIhadgonetothatparticulargasstationwasthatIwantedtotakealittledriveand18myhead. AsIreplacedthegascaphavingsentthemontheirwayIsuddenly19thatIfeltbetter.Myheadwasclear.AndIam20fortherealgoodnessitbroughtintomylife. 1A.cared B.hesitated C.worried D.complained 2A.making B.leaking C.burning D.pumping 3A.goahead B.giveup C.setoff D.hurryup 4A.gas B.coins C.directions D.food 5A.upon B.with C.except D.beyond 6A.starving B.sheltering C.traveling D.hiding 7A.lost B.arranged C.located D.headed 8A.distance B.line C.sign D.address 9A.feeling B.evidence C.reward D.pleasure 10A.generally B.exactly C.wholly D.personally 11A.destination B.field C.office D.apartment 12A.thoughtof B.putoff C.turnedto D.endedup 13A.companion B.passenger C.helper D.colleague 14A.explained B.repeated C.demonstrated D.recalled 15A.silence B.coldness C.appreciation D.embarrassment 16A.situation B.accident C.conversation D.incident 17A.meaningful B.fortunate C.important D.difficult 18A.clear B.empty C.cover D.turn 19A.understood B.realized C.acknowledged D.assume 20A.anxious B.fit C.ready D.grateful
化简比．8.5米25分米
育人书店上周图书销售情况统计图．根据统计图填空1售出图书最多的一天比最少的一天多册．2本周一共售出图书册．3平均每天售出图书册．4星期五售出的图书册数是星期四售出册数的%．
Nowadays5GisverypopularamongcustomersbutChinaislookingpast5Gandintending.1builda6Gnetwork.Chinaisstartingresearchinto6G2makeitoneofthefirstcountriestodoso.Theactualdevelopmentof6Gwilt3officialbeginin2020butthecommercialusewillhavetowait. The4arriveof5Ghasattractedalotofpeople.ItnotonlybringsfastmobileInternetbutalso5enableustoconnectwithmachines.So6is6Gsupposedtobringespeciallyforordinarypeople?Foronething7willmakemobileInternetworkataspeedof1TBpersecondwhichmeansyoucandownloadaround100films8lessthanonesecond.Foranother6Gwillconnectourdevices9efficientlythan5GwhichmakesInternetcoveragemuchwider. Ofcoursethereisalongwaytogoyet10Ibelievetomorrow'sInternetisinourhands.Ourlifeinthefuturewillbewonderfulandfantastic.
求比值．
解方程-6x=-x+1
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的顶点在线段AB上运动，与x轴交于 D.两点（C.在 的左侧），点C.的横坐标最小值为
，则点D.的横坐标最大值为( ) 
A.－3 B.1C.5D.8
A.（2，3） （3，2） （1，3） （3，1）
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