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已知函数y=|x2-2x-3|的大致图象如图所示,如果方程|x2-2x-3|=m(m为实数)有2个不相等的实数根,则m的取值范围是 .
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已知函数y=logax+b的图象如图所示则a+b=________.
已知二次函数y=ax2+bx+c的图象如图所示则毛1这个二次函数的解析式为__________2当x
已知函数y=fx的导函数f′x的图象如图所示试画出函数y=fx的大致图象.
已知y=fx的图象如图所示.1求fx的解析式2求函数的值域.
已知函数y=logax+b的图象如图所示.1求实数a与b的值2函数y=logax+b与y=logax
已知二次函数y=﹣x2+2x+31在如图所示的坐标系中画出该函数的图象2根据图象回答x取何值时y>0
已知函数y=gx的图象由fx=sin2x的图象向右平移φ0<φ<π个单位得到这两个函数的部分图象如图
函数y=fx的图象如图所示则导函数y=f′x的图象大致是
如图已知函数y=2x+b和y=ax-3的图象交于点P-2-5根据图象可得方程2x+b=ax-3的解是
已知二次函数y=ax2+bx+c的图象如图所示.1对称轴方程为____________2函数解析式为
一次函数y=kx+b的图象如图所示则方程kx+b=0的解为
x=2
y=2
x=-1
y=-1
已知一次函数y=kx+b的图象如图所示则下列判断中不正确的是
方程kx+b=0的解是x=﹣3
k>0,b<0
当x<﹣3时,y<0
y随x的增大而增大
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)
2
+3
y=3(x-1)
2
+3
y=-3(x+1)
2
+3
y=3(x+1)
2
+3
函数y=fx的图象如图所示试画出导函数f′x图象的大致形状.
已知函数y=fx其导函数y=f′x的图象如图所示则y=fx
在(-∞,0)上为减函数
在x=0处取极小值
在(4,+∞)上为减函数
在x=2处取极大值
已知二次函数y=ax2+bx+ca≠0的图象如图所示则以下说法不正确的是
根据图象可得该函数y有最小值
当x=﹣2时,函数y的值小于0
根据图象可得a>0,b<0
当x<﹣1时,函数值y随着x的增大而减小
若函数y=fx的图象如图所示则函数y=f1﹣x的图象大致为
抛物线y=ax2+bx+ca≠0的图象大致如图所示下列说法①2a+b=0;②当-1≤x≤3时y
一次函数y=3x+12的图象如图所示由此可知方程3x+12=0的解为.
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_
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Althoughhometreatmentmayproviderelieffromasorethroatthediseasecanonlybecuredwithmedications. A.present B.permanent C.temporary D.thorough
Ifyouwanttolearnanewlanguagetheveryfirstthingtothinkaboutiswhy.Doyouneeditfora1reasonsuchasyourjoboryourstudies?2perhapsyouareinterestedinthe3filmsorthemusicofadifferentcountryandyouknowhowmuchitwillhelptohavea4ofthelanguage. Mostpeoplelearnbestusingavarietyof5buttraditionalclassesareanidealstartformanypeople.They6anenvironmentwhereyoucanpracticeunderthe7ofsomeonewho'sgoodatthelanguage.Wealllead8livesandlearninglanguagetakes9.Youwillhavemoresuccessifyoustudyregularlysotrytodevelopa10.Itdoesn'tmatterifyouhaven'tgotlong.Becoming11inalanguagewilltakeyearsbutlearningtogetbytakesalotless. Manypeoplestartlearningalanguageandsoongivenup.I'mtoo12theysay.Yeschildrendolearnlanguagesmore13thanadultsbutresearchhasshownthatyoucanlearnalanguageatany14.Andlearningisgoodforthehealthofyourbraintoo.I'vealsoheardpeople15aboutthemistakestheymakewhen16.Wellrelaxandlaughaboutyour17andyou'remuchlesslikelytomakethemagain. Learninganewlanguageisnever18.Butwithsomeworkanddevotionyou'llmakeprogress.Andyou'llbe19bythepositivereactionofsomepeoplewhenyousayjustafewwordsin20wonlanguage.Goodluck! 1A.technical Bpolitical C.practical D.physical 2A.After B.So C.Though D.Or 3A.literature B.transport C.agriculture D.medicine 4A.view B.knowledge C.form D.database 5A.paintings B.regulations C.methods D.computers 6A.protect B.change C.respect D.provide 7A.control B.command C.guidance D.pressure 8A.busy B.happy C.simple D.normal 9A.courage B.time C.energy D.place 10A.theory B.business C.routine D.project 11A.bored B.fluent C.interested D.devoted 12A.old B.nervous C.weak D.tired 13A.closely B.quickly C.privately D.quietly 14A.age B.speed C.distance D.school 15A.worry B.hesitate C.think D.quarrel 16A.singing B.working C.bargaining D.learning 17A.progress B.mistakes C.cleverness D.clumsiness 18A.tiresome B.hard C.interesting D.easy 19A.blamed B.amazed C.interrupted D.informed 20A.their B.his C.our D.your
Wetouchthelivesofothersinwaysweoftenneverknow.Peoplesometimescomeintoourpersonalworldforfleetingmomentsbutcanleaveusforeverchanged.Wehavemorepowertocreateortodestroythanwecanimagine.Wecanleavethingsorindividualsbetterorworsethanwefindthem.Alookawordoragesturemayhaveagreatimpact.Itwasarainyday.Iwasgoingtoworkonabus.Ididn'tnoticethebusinessmanuntilwebothgotoffatthesamestopandwalkedtothesamenewsstand报刊亭togetamorningpaper.Themanrunningthestandwasobviouslyhavingabadday.Hewasrudeandunsmilingaswepurchasedourpapers.Thebusinessmancaughtmyeyeandsmiled.Hesmiledbrightlyandthankedthenewsstandownerforthepaper.Themanrunningthenewsstandrespondedonlywithasourexpression.Thebusinessmanthenpleasantlywishedhimapleasantday.AsweturnedawayIaskedthismanwhyhehadcontinuedtobepleasanttothenewsmanwhowasn'tfriendly.Thebusinessmansmiledatmeandsaid'WhywouldIletsomeoneelsecontrolwhatIsayandwhatIfeelorwhatkindofdayI'mgoingtohave?'Wethenseparatedtogotoourownworkplaces.TothisdayIdon'tknowwhothatbusinessmaniswhereheworksoranythingelseabouthim.ButI'veneverforgottenthewordshesaidorthewayhesmiledwhichseemedlikealineoflightonagreydayWecannotcontrolpeopleandsituationsthatcometousbutwecanalwayscontrolourresponsetothem.Andinsuchpositivedecisionslieourcontrolandpersonalpowertomakeapositivedifferencetoourlivesandthelivesofothers.1Whatdoestheunderlinedword'fleeting'inParagraph1mean?Nomorethan1word2Whatdidthebusinessmancometothenewsstandfor?Nomorethan3words3Whydidthewriterconcludethatthenews﹣standownerhadabadday?Nomorethan10words4Whatmadeagreatdifferenceonthatgreyday?Nomorethan10words5Whatcanwelearnfromthebusinessman?Nomorethan30words
Istillremembermymiddleschoollifeinthatsmalltown.IamtheninaschoolforstudentsfromTibet.Aswealllefthomeataearlyagewemetlotsofproblemsinourdailylife.Wehadtodothewashingcleaningandshoppingbyus.Howeverweseldomfeltlonelyorhelplessly.Weenjoyedourhappylife.Atweekendswewouldplaybasketballswaminthepoolorgoforapicnic.Wearelivedinabigfamily.Wetreatedeachotherbrothersandsisters.Ifanyoneofushadanydifficultywithhisstudiestheotherstudentwouldhelphimout.Ithasbeenfiveyearswhenwegraduatedbutthosememoriesareassweetasneverbefore.
Mygrandmotherwasalwaysencouragingmetosetgoalsandworkhardtoachievethem.Shewouldtellmenottobeafollowerandnottoset1onwhatIcouldachieve.She2believedthattherewerenolimitsthatyoucould3whateveryouwanted.Iwouldneverforgetthefollowingstorythatsheoncetoldme.Afarmerwonfirst4atthecountryfairforhishugeradish小萝卜thatwastheexactshapeand5ofamilkbottle.Manywere6astohowthefarmerwasabletogrowthisradishthatwastheexactshapeofamilkbottle.7onegentlemanwentuptothefarmerandaskedthequestion.Thefarmerreplied'Itwas8.IgottheseedgrowingandthenIputitintothemilkbottle.Ithad9elsetogo.'Youcanusethisstoryasananalogy比喻tolife﹣ourlivesare10bythekindofsurroundingsweplaceourselvesinthepeoplethatweallowto11usandthegoalswegiveourselves.Ifweonly12andtakenoactionthenwegetnofurther.Butifwe13setagoalandtakeactionthenourlifetakesa14shape.Goalsandactionscanhelpusaccomplishmoreinayearthanwhatsomepeoplewillaccomplishinalifetime.Toprovethis15readthebiographiesof16peopleandyouwillseethatgoalsandactions17playedabigroleintheirsuccess.Rememberthe18ofMaryKayAshwhosaid'Don'tlimityourself.Manypeoplelimitthemselvestowhattheythinktheycando.Youcango19yourmindletsyou.Whatyoubelieverememberyoucanachieve.'Insummarydon'tputyourselfinabottleinotherwordsmoveoutofwhatis20andsecureifyouwanttomoveforward.1A.expectations B.rules C.limits D.lines2A.truly B.naturally C.tightly D.partly3A.win B.grasp C.realize D.achieve4A.price B.prize C.position D.award5A.size B.length C.weight D.height6A.doubtful B.worried C.anxious D.curious7A.Immediately B.Gradually C.Finally D.Actually8A.strange B.easy C.funny D.secret9A.nowhere B.everywhere C.somewhere D.anywhere10A.shaped B.formed C.controlled D.improved11A.understand B.help C.influence D.contact12A.dream B.refuse C.doubt D.change13A.struggle B.refuse C.continue D.plan14A.beautiful B.different C.solid D.clear15A.truth B.lesson C.point D.evidence16A.successful B.brave C.friendly D.careful17A.asusual B.aboveall C.atall D.infact18A.case B.wisdom C.thought D.speech19A.asif B.incase C.asfaras D.aslongas20A.comfortable B.valuable C.ordinary D.boring
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