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發表於:2020-10-17
問題詳情:已知函數f(x)=x2+2ax+3,x∈[-4,6].(1)當a=-2時,求f(x)的最值;(2)求實數a的取值範圍,使y=f(x)在區間[-4,6]上是單調函數;(3)當a=1時,求f(|x|)的單調區間.【回答】解:解 (1)當a=-2時,f(x)=x2-4x+3=(x-2)2...
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發表於:2019-06-09
問題詳情:46.Post1isaimedatpeoplewhowantto_______. A.maketheirmomshappy B.enjoyeatinghamburgers C.havecheapmealsoutside D.eatchickenseafood4...
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發表於:2021-10-31
問題詳情:46.Theteachersarestrict________theirpupils.47.Wethink_________necessarytomasteraforeignlanguage.48.Therearetimes__________weneedquietandpeace.49.Beijingwasthefirs...
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發表於:2020-06-22
問題詳情:46.LiMingis_______(optimism)abouthisfuture.47._______(exhaust),Islidintoandfellfastasleep.48.Hekeptme________(inform)ofthechangesinourschool.49.Believeitornot,itm...
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發表於:2020-05-08
問題詳情:46.Haveyoumadean_______tohimforbreakinghiswindow?47.Hebeggedfor_____(forgive)forwhathehaddone.48.Reachingthetopofthetower,hewasoutof_______.49.ItissaidYogaisofgre...
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發表於:2019-08-26
問題詳情:Everycountrysharesthings 46 common:wevaluefamilyandlaughter,cherishfoodandhealth,andcelebratelarge 47 (festival)andtraditions.Yetwithinthesimilarthing...
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發表於:2021-09-24
問題詳情: (46) Youprobablythinkyouwillneverbeatopstudent;Thisisnotnecessarilyso.however,Anyonecanbecomea betterstudent ifheorshewantstoHere'show. Planyour...
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發表於:2021-03-03
問題詳情:Oncetherelivedarichman 46 wantedtodosomethingforthepeopleofhistown. 47 firsthewantedtofindoutwhethertheydeservedhishelp. Inthecentreoft...
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發表於:2021-04-24
問題詳情:46.Stand-upisakindofcomedywhoisdoneonastagebyacomedian.47.Peoplearoundtheworldenjoywatchcomedies.48.SangLanhasadaptedhernewlifesuccessfully.49.Laughterisgoodforou...
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發表於:2021-01-21
問題詳情:46.Suddenlyit_______mehowdifficult_______wasforawomanto______________ herresearchintochimpsintheforest.我突然想起,一個女子繼續在森林研究猩猩是多麼難。47.JaneGooda...
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發表於:2018-07-18
Thechylehaddisappeared46dayspostoperatively.Thecorporatetaxratealsofellto34%from46%.Eachcellofourbodiescontains46chromosomes.Bohrat46wasthegrandoldman.Note:foraccessories...
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發表於:2020-08-05
問題詳情:youdevelopAIDS,yourchancesof__________(survive)areverysmall.Iwasyoung,Ididn’tknowmuchabouttheharmful_______(affect)ofsmoking.eadvicemighthelpyoutostopand________...
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發表於:2019-12-26
問題詳情: 46.Ihavemadealotofgoodfriends Icametothisschool.47.Lindausedtobetooshytospeakin ,butnowsheisoutgoing.Themanasked ,...
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發表於:2021-03-09
問題詳情:It’snormaltowakebrieflyduringthenight. 46 Butifyou’rewakingupduringthenightandhavingtroublefallingbackasleep,thefollowingtipsmayhelp.Stayoutofyourhead.Thekeyt...
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發表於:2021-06-24
問題詳情:46.Itisrequiredthatthefirmr__________(改革)itsunfairsalarystructure.47. Thevicepresidentindicatedthatalla_________forthepostshouldhaveamaster’sdegree.48. T...
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發表於:2020-03-12
問題詳情:46.ThoughIhavefailedacoupleoftimes,Iwon’tgive______.47.Hardlyhadwesatdowninthetheater______theperformancebegan.48.Lackofmoney,theclubhastoput_______theiractivity...
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發表於:2020-12-08
問題詳情:46.Therewassuchalongqueuewaitingfortheticketsande_______________wegaveup.47.Thebadweatherisreportedtohavecontributedtothepassengerplane__________(墜毀).48.Afterwhatseeme...
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發表於:2020-06-24
問題詳情: Thetruth 46 treesarevitaltoourlifeisnotasecret.Theyprovideuswithfood,woodandmost47 (important),oxygen.Nowthereisonemorethingwecanaddtothislist—blo...
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發表於:2021-10-26
問題詳情:46.Becauseofthecomputer,nowwecan____________(交流)withotherpeopleontheInternet.47.Ourworkmatehasbeenindanger.We’reall___________(關心)abouthishealth.48.ThoughIhaven’tm...
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發表於:2020-12-06
問題詳情:46. Childrenincitiescanreceivehigher___________(educate).47. A___________(smell)gascameoutofthewell.48. ThetrafficruleinEnglandaredifferetfromthoseoftheother__...
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發表於:2019-02-06
問題詳情:46.Wecanstarttheworknextweek___________________(如果必要的話).47. _________________________________________________(就我而言),thingsaregoingsmoothly.48. Whe...
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發表於:2020-04-06
問題詳情:46.Sheaskedmeto_________(陪伴)hertotheairport.isgenerallyacceptedthatweshouldraiseour________(意識)ofprotectingtheenvironment.r_________(建議)readingthebookbefore...
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發表於:2020-06-30
問題詳情:當x=-1時,2ax3-3bx+8的值爲18,則12b-8a+2的值爲( )A.40 B.42 C.46 D.56【回答】B 分析:把x=-1代入2ax3-3bx+8得2a×(-1)3—36×(-1)+8=-2a+3b+8.因爲此式的值爲18,所以-2a+3b+8=18,所以3b-2a=10,所以12b-8a=40,所...
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發表於:2021-02-08
問題詳情:46.IntheUSA,ColumbusDayinmemoryofthe________________(到達)ofChristopherColumbusintheNewWord.47.Themostenergeticandimportantfestivalsaretheonesthat________________...
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發表於:2020-06-25
問題詳情: ParisisthecapitalandlargestcityofFrance, 46 (situate)ontheRiverSeine.TheEiffelTower, 47 famoussymbolofParis,isthemostpopularplacefortourists...