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二次函数y=2x2﹣2x+m(m为常数)的图象如图所示,如果当x=a时,y<0,那么当x=a﹣1时,函数值( )
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如图二次函数y=x2+bx+c的图象过点B0﹣2.它与反比例函数y=﹣的图象交于点Am4则这个二次函
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已知二次函数y=x2-2mx+m2+3m是常数.1求证不论m为何值该函数的图象与x轴没有公共点2把该
已知二次函数y=﹣x2+2x+m的部分图象如图所示则关于x的一元二次方程﹣x2+2x+m=0的解为.
二次函数y=ax2+bx+ca≠0的图象如图所示那么一元二次方程ax2+bx+c=ma≠0m为常数且
1
2
-1
-2
二次函数y=ax2+bx+c的部分图象如图所示由图象可知该二次函数的图象的对称轴是直线x=.
已知:如图所示一次函数y=-2x+3的图象与x轴y轴分别交于A.C.两点二次函数y=x2+bx+c的
二次函数y=x2-x+mm为常数的图象如图所示当x=a时y
) y<0 (
) 0< y< m (
) y>m (
) y= m
已知二次函数y=﹣x2+2x+m.1如果二次函数的图象与x轴有两个交点求m的取值范围2如图二次函数的
已知二次函数y=﹣x2+2x+m的部分图象如图所示则关于x的一元二次方程﹣x2+2x+m=0的解为.
已知某二次函数的图象如图所示则这个二次函数的解析式为
y=-3(x-1)
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y=3(x-1)
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y=-3(x+1)
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y=3(x+1)
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已知二次函数y=ax2+bx+cabc是常数图象如图所示则当x满足的条件是
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﹣6<m<﹣2
已知二次函数y=-x2+2x+m.1如果二次函数的图象与x轴有两个交点求m的取值范围2如图二次函数的
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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. DearRita I'mgladthatyouwillcompeteinthefinaloftheChineseSpeechContest.Congratulationtoyou!Herearemyadviceonhowtomakegoodpreparationsforyourspeech. Firstpickainterestingtopicsothattheaudiencewon'tgetboring.Seconddobroadresearchesonthetopictosatisfytheaudience'shungerforknowledge.ThenwriteyourspeechandturntoyourChineseteachersforhelpwhichadvicewillbebeneficial.Besidesmuchattentionshouldbepayingtoyourvoiceorbodylanguage.Trytospeakasfluentaspossible.Inawordyou'dbetterdowhateveryoucanwinthecontest. Wherethereisawillthereisaway.Lookingforwardtohearingfromyourgoodnews. Yours Joana
Thisweekwe'resharingourfavoriterecentreads.Tohelproundoutourrecommendationswealsotappedsomefolkswhoyou'veheardonCodeSwitchbefore﹣novelistsscholarspoetsandpodcasters. AllYouCanEverKnowbyNicoleChung ThebookisanextraordinaryhonestandsympatheticlookatadoptionraceinAmericaandfamiliesingeneral.It'salsosuchanengagingread.Istayedupwaytoolateonenightreadingitbecausethestoryjustpulledmein.AndI'verecommendedmanyofmyfriendstoreaditsoIcantalkaboutitwiththem.﹣JasmineGuilloryauthorofTheWeddingDateTheProposalandtheforthcomingbookTheWeddingPart. BecomingbyMichelleObama It'sadeeply﹣movingcomingofagestoryofMichelleObamainherearlylife.Therearesuchmovinganecdotesabouthowthisfamilyjustinvestedeverythinginthepossibilityofgivingtheirchildrenabetterlife.It'snotasweetbookbutatthesametimeit'sdeeplyhopefulaboutthepossibilityofwhathappenswhenyouworkhardwhathappenswhenyoulovehard.﹣TayariJonesauthorofAnAmericanMarriageSilverSparrowandotherbooks. RageBecomesHer:ThePowerofWomen'sAngerbySorayaChemaly WhatreallyimpressedmeaboutthisbookisthisideathatwomenshouldbeallowedtoexpresstheirangerparticularlyinLatinAmericanfamiliesandcommunities.IjustthinkSorayagoesintothisincredibledetailcitingscientificstudiesanddifferentworksofliteraturethatreallyconveythenecessitytofemaleangernotonlyforthehealthofwomenbutforthehealthofequalityinsociety.﹣JeanGuerreroreporterwithKPBSandauthorofCrux:ACross﹣BorderMemoir. 1WhowroteTheWeddingDate? A.TayariJones B.JeanGuerrero C.JasmineGuillory D.SorayaChemaly 2Whichbooktellsabitterstorywithhope? A.Becoming B.AllYouCanEverKnow C.SilverSparrow D.Crux:ACross﹣BorderMemoir 3What'sthepurposeofthepassage? A.Tosellbooks. B.Tocommentonbooks. C.Tosharereviewsofbooks. D.Tocollectopinionsofbooks.
HONGKONG﹣Cross﹣borderbusesoperatedbyHongKongcompaniesonFridaystartedtrialrunsontheHongKong﹣Zhuhai﹣MacaoBridgeHZMBinpreparationforthebridge'supcomingopening. ThetrialrunsarrangedbythegovernmentsoftheChinesemainlandtheHongKongSpecialAdministrativeRegionSARandtheMacaoSARwouldlastforthreedaysandaimedattestingthereadinessofboundarycrossingfacilities设施ofthethreeplacestheHongKongSARgovernment'sTransportandHousingBureautoldXinhua. Twomajorcross﹣boundarycoachtradeassociationsinHongKongwereinvitedtosendbusesandmemberstoparticipateinthetrialruns. FreemanCheungsecretaryofHongKongGuangdongBoundaryCrossingBusAssociationsaidhisassociationwouldrunonebuswithabout10passengersonFridayandSaturdayrespectivelyaspartofthetrialruns. OurbusstartedatnoonfromtheHongKongBoundaryCrossingFacilitiesandranallthewaytoZhuhaiinabout40minuteshesaidaddingthatthejourneywassmooth. AlanChansecretaryofanothertradeassociationwhoparticipatedinthetrialrunsasapassengersaidtheclearanceproceduresatboundarycrossingfacilitiesofthethreeplacesallwentonwellandsmoothly. TheboundarycrossingfacilitiesofZhuhaiandMacaoinparticularareoperatedinacollaborative合作的waywhichhelpsremarkablyshortenthetimeneededfortheclearanceprocedureshesaid. TheHZMBsituatedatthewatersofLingdingyangofPearlRiverEstuaryisamega﹣sizeseacrossinglinkingtheHongKongSARZhuhaicityofGuangdongProvinceandtheMacaoSAR. The55﹣kmbridgeisthelongestbridge﹣and﹣tunnel隧道seacrossingintheworld. ThebridgeismeanttomeetthedemandofpassengerandfreightlandtransportamongHongKongtheChinesemainlandandMacaoandtoestablishanewlandtransportlinkbetweentheeastandwestbanksofthePearlRiver. 1Welearnfromthepassagethat. A.AlanChanparticipatedinthetrialrunsasadriver B.twocoachtradeassociationsinZhuhaitookpartinthetrialruns C.theHZMBislocatedatthewatersofLingdingyangofPearlRiverEstuary D.the55﹣kmbridgeisthesecondlongestbridge﹣and﹣tunnelseacrossingintheworld 2Whatisthemainideaofthesecondparagraph? A.Therouteofthetrialruns. B.Theeffectofthetrialruns. C.Thepurposeofthetrialruns. D.Theevaluationofthetrialruns. 3Whatdoestheunderlinedwordfreightinthelastparagraphmean? A.Goodsthataretransportedbytruckstrainsshipsorplanes. B.Linesofraisedwaterthatmovesacrossthesurfaceofthesea. C.Partsoftheseawherefisharecaughtinlargenumbers. D.Theregularrisingandfallingofthelevelofthesea. 4Whichofthefollowingcanbethebesttitleforthenewsreport? A.HZMBIstoEstablishNewLandTransportLink B.Cross﹣borderBusesStartTrialRunsonHongKong﹣Zhuhai﹣MacaoBridge C.Mega﹣sizeSeaCrossingLinkingHongKongSARZhuhaiandMacaoSAR D.BoundaryCrossingFacilitiesofZhuhaiandMacaoOperatedCollaboratively
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. LastSundaywhileeatinginarestaurantInoticeabowlfullofdumplingsonthetablenexttomine.Theymusthavebeenleftbysomeone.Justthentheoldmanentered.JudgedfromhisclothesIbelievedshewaspoor.Hesawthedumplingsleftonthetable.Lookingshylyhesatdownandstartedeating.Theothersaroundlookedhimpuzzledbutsomeevenlaughed.Howeverafterfinishingthedumplingshewentuptothedonationboxesonthecounterputonehundredyuaninitandleftthatleftusallshockedandashamed.Weshouldn'tjudgebyapersonjustfromhisorherappearance.
Thetonsofplasticwe'redumpingintheoceansisfindinganewhome﹣thestomachsofourbeautifulmarineanimals.YetanotherreminderofthisfactwashedashoreinEasternIndonesiathisweek.Alargeamountofwasteincludingdrinkingcupsandflip﹣flopswasfoundinthestomachofawhalethatdiedoffthecoastnearKapotaIsland. The9.5﹣metrespermwhale抹香鲸wasfoundbyrescuersfromtheWakatobiNationalPark. Thewhalehadswallowed5.9kilogramsofplasticwastecontaining115plasticcupsfourplasticbottles25plasticbagsandmorethan1000otherkindsofpiecesofplasticparkchiefHeriSantosotoldthereporter. AlthoughwehavenotbeenabletodeducethecauseofdeaththefactsthatweseearetrulyawfulsaidDwiSupraptiamarinespeciesconservationco﹣ordinatoratWWFIndonesia.Shesaiditwasnotpossibletodetermineiftheplastichadcausedthewhale'sdeathbecauseoftheanimal'sadvancedstateofdecay腐烂.Butthisisonlythelatest. FourAsiannations﹣IndonesiathePhilippinesVietnamandThailand﹣accountfor50%oftheplasticwasteintheoceansaccordingtoareportbyenvironmentalcampaignerOceanConservancyandtheMcKinseyCenterforBusinessandEnvironment.ThePhilippinesissecondtoIndonesiawhenitcomestoputtingawayplasticwasteintheoceansaccordingtoastudypublishedinthejournalScienceinJanuary.Ofthe3.2millionmismanagedwasteitproduceseveryyear1.29millionendsupintheocean. Areportreleasedearlierthisyearstatedthattheamountofplasticintheoceanislikelytoincrease. 1Whatcanweknowaboutthespermwhale? A.Itsstomachisthehomeofplasticwaste. B.Itdiedofswallowinglotsofplasticwaste. C.Itwasthefirstwhaletoeatplasticwaste. D.Ithadeatenmuchplasticwastebeforeitsdeath. 2Whichcanbestreplacetheunderlinedworddeduceinparagraph3? A.confirm B.cause C.approve D.contain 3Whichcountrydumpsthemostplasticwasteintotheoceans? A.Thailand B.Indonesia C.Vietnam D.Philippines 4What'sthemainideaofthepassage? A.Philippinesputsaway1.29milliontonsofplastic. B.AspermwhalewasfounddeadnearKapotaIsland. C.Muchdumpedplasticwastewasfoundinadeadwhale. D.Weshouldtakemeasurestoreducethewasteinwhales.
在同一直角坐标系中一次函数y=kx﹣k与反比例函数y=k≠0的图象大致是
某企业的年产值在两年内从1000万元增加到1210万元求平均每年增长的百分率.
计算
LikemanymilitarywivesIhadtostandthelongseparationsuntilmyhusbandretired.ThoughIsupportedhiminhischosencareerI1everymomentawayfromhim. To2ourseparationsIwroteletterseveryday.Imadeupdozensofsmall3forhimwhichIsecretlyputintohisbagsothathecould4themwhenhewasouttosea.Tothisdaythosenotesarestill5tous. 6in1996myhusbandretiredfromtheNavy.Buttheonlyjob7formyhusbandwassixandahalfhoursofdrivingawayinNorfolkVirginia. Wespenteightmonths8.Thatwasourhardestseparationperhapsbecausewehad9plannedtobeapartagain.He10toapplyforjobsintheareawherewehopedtolive.Weexpectedwewouldsoonbeabletobe11again. OnedayLouiecalledmewiththegood12.HefoundajobinsouthwestVirginia.Wewereexcited!Therewasonlyonesmall13.Louiewouldhavetoliveinacamper露营车whileourdaughtersandIlivedinalittlehouseanhourandahalfofdriving14.Mydaughterswere15enoughtotakecareofthemselves?SoIleftthemandstayedwithLouie. LouieandIspentseveral16weekstogether.OnemorningafterheleftforworkIsat17inthecampertryingtorememberanypossessionthatwasaspricelessasthe18westayedtogether.Icouldn't19asinglething.Thenallofusmovedintothatcamperandlivedthereforayear.Itwaspurejoy!I'velearnedthatthegreatest20IhaveisthetimeI'vespentwiththeonesIlove. 1A.spent B.enjoyed C.hated D.missed 2A.dealwith B.preparefor C.thinkof D.fightfor 3A.stories B.gifts C.letters D.notes 4A.receive B.discover C.consider D.write 5A.precious B.important C.strange D.necessary 6A.Once B.Again C.Soon D.Finally 7A.convenient B.common C.ready D.available 8A.easily B.apart C.normally D.happily 9A.already B.just C.never D.always 10A.continued B.afforded C.managed D.liked 11A.rich B.young C.close D.together 12A.news B.job C.chance D.skill 13A.shame B.mistake C.fault D.problem 14A.far B.distance C.away D.farther 15A.clever B.old C.strong D.beautiful 16A.long B.simple C.wonderful D.busy 17A.patiently B.alone C.sadly D.calmly 18A.plan B.promise C.time D.place 19A.dependon B.thinkof C.careabout D.focuson 20A.treasure B.happiness C.luck D.feeling
Haveyoueverbeeninasituationwherefirstaidwasrequired?Didyouknowwhattodo?Didyoufeeladequatelyequippedandconfidentenoughtoperformfirstaidprocedures?AttheSOSCentertrainedprofessionsprovidesomeone﹣ononeandgroupcoursesinfirstaid.1. FirstAidForInfants婴儿 Thiscourseisdesignedforfirst﹣timeparentswhodonothaveabasicknowledgeoffirstaidforinfantsandbabies2orifyouwanttoavoidmorelifethreateningproblemsandillnessesyouwillgetthemfromthesetopics. FirstAidforChildren Everyparentknowsthefearofreleasingtheirsmallchildoutintotheworldawayfromtheirwatchfuleye.3.Thiscourseteachesparentshowtodeterminewhenaninjuryrequiresstitches缝针howtotreatbasiccutsaswellashowtotreatsunburnsandotherwounds. 4Ourmostpopularcourseoffersallkindsofapproachestoapplyingfirstaid.Inthistwo﹣daycourseyou'lllearnsomebasicskillssuchashowtorespondwhenachildoradultchokeswhattodoifsomeonehasaheartattackorstrokehowtoreacttosnakebitesandspiderbitesandmore.Thiscourseishighlyrecommendedforlearnersofallages. 5InadditionweareplanningtoopenspecialcoursesincommunitycentersaroundBeijing.FormoreinformationonSOSandourcourseselectionortoregisterforacoursepleasevisitwww.firstthigsfirst.com. A.BasicTrainingCourseinFirstAid B.VariousFirst﹣AidCoursesforBabies C.Whenyouwanttoeaseyourbaby'sdiscomforts D.Ifyouwanttoavoidtheriskofyourparents'injuries E.Classesareofferedonaregularbasisatourmainoffice F.Weofferavarietyofcoursesdesignedtomeetparticularneeds G.Aschildrengrowmoreadventuroustheriskofinjuryincreasesaswell
已知等腰三角形腰长为2cm面积为1cm2则这个等腰三角形的顶角为.
三角形三边长为6810则这个三角形的面积是.
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