首页
试卷库
试题库
当前位置：
X题卡
>
所有题目
>
题目详情
代数式在实数范围内有意义，则x的取值范围是 ．
查看本题答案
包含此试题的试卷
教案备课库《》真题及答案
点击查看
你可能感兴趣的试题
若代数式在实数范围内有意义则x的取值范围是
x≥－3
x＞3
x≥3
x≤3
若代数式在实数范围内有意义则x的取值范围是
x≥-3
x＞3
x≥3
x≤3
代数式在实数范围内有意义则的取值范围是.
若代数式在实数范围内有意义则x的取值范围是
x＜2
x＞2
x≥2
x≤2
若代数式在实数范围内有意义则实数a的取值范围为
a＝4
a＞4
a＜4
a≠4
若代数式在实数范围内有意义则x的取值范围是_______
若代数式在实数范围内有意义则x的取值范围是____________.
若代数式在实数范围内有意义则x的取值范为是
x≥－2
x＞－2
x≥2
x≤2
若代数式在实数范围内有意义则x的取值范围为
x<-３
x≥-3
x>2
x≥-3，且x≠2
代数式在实数范围内有意义则x的取值范围是．
代数式在实数范围内有意义则x的取值范围是
代数式在实数范围内有意义则x的取值范围是.
代数式在实数范围内有意义则x的取值范围是
若代数式在实数范围内有意义则实数x的取值范围是
x≥﹣1
x＞2
x≠2
x≥﹣1且x≠2
若代数式在实数范围内有意义则实数x的取值范围是
x＜3
x＞3
x≠3
x＝3
若代数式在实数范围内有意义则x的取值范围是
代数式在实数范围内有意义则x的取值范围是.
若代数式在实数范围内有意义则实数x的取值范围是
x＜3
x＞3
x≠3
x＝3
若代数式在实数范围内有意义则实数x的取值范围是．
已知代数式在实数范围内有意义则x的取值范围是.
热门试题
更多
小强的奶奶有一只玉镯他通过网络了解到密度是玉器品质的重要参数通过实验他测出了玉镯的密度．用调节好的天平测出玉镯的质量当天平平衡时右盘中砝码及游码的位置如图玉镯的质量是．用量杯测得玉镯的体积是20cm3．则玉镯的密度为kg/m3．
寒冷的冬天玻璃窗上会起“雾”或结“冰花”下面关于此现象的说法正确的是
25分假定你是李华你校组建了游泳俱乐部.请给你的留学生朋友peter写信邀请他加入.内容包括: 1.组建俱乐部的目的; 2.俱乐部的主要活动; 3.报名的时间和地点; 注意: 1.词数100左右; 2.可以适当增加细节以使行文连贯. 开头语和结束语己为你写好不计入总词数. DearPeter Howiseverythinggoing﹣﹣﹣﹣ Yoursever LiHua
10分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. IfoundawalletacoupleofweeksagointhecarwhereIwasrenting.Thewallethadcreditcardsbutquiteabitofcashinside.Thegentlemanitwasbelongedtohappenedtobecelebratinghisbirthdaythatsameday.Iwasabletomailhimhiswallet.AfewweekslaterIreceivethis.JamieIcan'ttellyouhowfortunatelyIfeltwhenIreceivedmywalletsendingbyyou.Itisrarethatsomeonecanreturnawalletletalonereturnwith100%ofitscontent.I'llbethankfulforyouforever.TearsfilledmyeyewhenIfinishedreadinganote.
15分Aninsect1callthefallarmywormhasalreadyeatencropsintheAmericasandAfricaNowitisdoingthesameinAsia.Theyoungwormsareaboutthesizeofaperson'ssmallestfinger.Theycandamagemaize玉米especially2makethevegetablesoftandwet.UrapomNounartis3expertonfarmpestsatThailand'sAgricutureDepartment.Weneverbadthisonebeforeshesays.Thefallarmyworms4findlatelastyearinanareanorthwestofBangkok.It'sabigproblemNounartadded.Thewormscanmakefarmerslosetheirprofits.Tomakematters5badtheyaredifficult6fight.Yetlimitingtheinsectsiscritical.AlthoughAsiaiswell﹣known7itsricegrowingmaizeisalsoamajorcropandanimportantsourceoffoodforchickenscowsandotheranimals.ThefallarmywonnisnativetoanareathatspreadsfromArgentinatonorthernCanada.Theretheinsecthasnaturalenemies8existencehelpstokeepthefallarmywormpopulationatacceptablelevels.Butsuchhelpisnotfoundeverywhere.Expertsnotethat9chemicalagainstthewormsarecostlydangerousanddonotalwayswork.Sosomefarmerswhosufferagreat10loseinThailandaretryingotherwaystofightthefallarmyworms.
三个和尚挑水吃的故事相信大家耳熟能详如图所示甲图中和尚们商量出新的挑水方案胖和尚一人挑两小桶瘦和尚和小和尚两人合抬一大桶．以下说法中不正确的是
用铅笔可以做很多物理小实验．1如图甲所示手指压铅笔尖手指感到疼因为力的作用是．2如图乙所示用两手指水平压住铅笔的两端．感觉压笔尖端的手指较痛说明在相等时受力面积越小压力作用效果越．3用一根橡皮筋水平匀速拉动放在桌面上的一本书然后在书下垫几支圆铅笔后再拉橡皮筋更短图丙由此得出的结论是．
如图是用来研究凸透镜成像规律的实验装置示意图屏未画出当蜡烛和透镜放在图示位置时通过移动光屏可以在光屏上得到与物体等大的像．若透镜位置不变将蜡烛移到刻度为30cm处则
10分Throughouthistoryandineveryculturepeoplecry.NowadayspeoplearefacingmoreandmorepressurefromworklifefamilyhealthandloveSometimeswhensadnessreachesacertainlevelcryingisanecessaryconsequence.1PsychologicalcounselorLiJinfromtheYangGuangHuaRenPsychologicalServicesaystheanswerisYes.Weepingisoneofthemechanismsthathumansusetogetridofsometoxins毒素.Tearsmaybeinvolvedinremovingwasteproductsortoxicsubstancesfromthebody.Perhapsthatiswhysomanypeoplesaytheyfedbetteraftercrying.ThechemicalcomponentsoftearsarefarmorecomplexthanonewouldimagineLiJinintroducedaninterestingexperimentconductedbyAmericanscientists.Thescientistsfirsthadsomevolunteerswatchasadmovie.2Latertheyhadthesevolunteerscutonionstoproducetears.Chemicalanalysisafterwardsshowedthatthetearscollectedfromcuttingonionsareverydifferentfromthosecreatedbywatchingasadmovie.Somepeoplemaythinkthatcryingissimplyasignofweaknessorbeingoutofemotionalcontrol.3.Whenyoufeelpressurefrustrationsorroworanger﹣anynegativeemotions﹣youshouldtakeeffectivemeasurestorelievethem.4LiJinaddedthatcryingisjustonewaytoreleasepressure.5Findingtheonethatfitsyoubestisthekeytokeepingastableconfidentandhealthypsychologicalstate.A.Andthentheycollectedtheirtears.B.Cryingisjustanaturalandhealthymeans.C.Butactuallycryingisaformofstressrelief.D.WouldyouusecryingasawaytogainsupportE.Therearemanyalternativesyoucanusetomakeit.F.Thesadmoviefailedtomakethemburstintotears.G.Arethereanyphysicalorhealthbenefitsfromcrying
30分BrianPetershadonethingtodobeforeleavinghisjobasapoliceofficerinBrooklyn.Hedecidedtospend﹩500he1forhisservicetobuy10giftcardsandhandedthemouttostrangersinBrooklynCenteronhis2day. Ittookhimabouttwohoursto3thecardsandthathecouldputsmilesonalotofpeople's4includingonewomanhestopped5noticingtheconditionofhercar.Hercarwasreallyoldandreally6.Isawherscreenwiperswere7intheuppositionPeterssaid.I8whatIwasdoingandgaveheragiftcardand9shelitupwithasmile. Oncepeople10theinitialshockofwhathewasdoingPeterssaidhe11alotmorehugsthatday.MoniqueDrierwho12withPeterssaidPetershas13wantedtogivebackanddidn'treallywanttheattention.Hedidn'tevenhaveagoingaway14Driersaid.Hehasalwaystriedto15thehumansideoflawpractice.Hewasagreat16andwillbedearlymissed. Peterswhostartedhis17jobthreedaysagosaidhestillwantstocontinuegivingbacktothe18.Communityserviceisextremely19andwhenyou'refortunateinlifeyoushouldgivebacktootherswhoaren'tasfortunateasyouPeterssaid.That'swhat20theworldgoround. 1A.earned B.created C.borrowed D.achieved 2A.first B.last C.victory D.great 3A.giveout B.giveaway C.giveup D.giveoff 4A.eyes B.heads C.mouths D.faces 5A.before B.until C.after D.since 6A.damaged B.destroyed C.ruined D.harmed 7A.placed B.laid C.set D.stuck 8Aannounced B.declared C.explained D.appreciated 9A.gently B.kindly C.immediately D.totally 10A.overcame B.admitted C.believed D.struck 11A.accepted B.received C.agreed D.distributed 12A.stayed B.performed C.organized D.watched 13A.often B.always C.seldom D.hardly 14Aconference B.congratulation C.celebration D.party 15A.remember B.forget C.prevent D.insist 16A.soldier B.policeman C.teacher D.official 17A.convenient B.free C.different D.new 18A.world B.country C.community D.association 19A.authentic B.practical C.brilliant D.important 20A.forces B.equips C.makes D.explores
8分Haveyoueverseensomethingcute可爱likeababydogorababyrabbitandjustwantedtohugittopiecesI'mprellysureyouhave.Whenyouthinkaboutithaturgeiskindofpeculiarmaybeevenalittledangerous. HoweveritturnsouttheIwanttohugyouandsqueezeyoutodeathurgeyoumightfeelwhenyousetsomethingcuteistotallynormal.AstudydoneatYaleUniversityrecentlyexploredthisphenomenonandtheFindingswerepublishedinPsychologicalScience.Theexperimentstudiedwhathappenedwhenpeoplewerepresentedwithcutestimuli刺激. Thestudyfoundthatpeoplewhohavecxtremelypositivereactionstocutebabiesalsodisplayedstrongeraggressiveexpressions.Iknowthatsoundskindofstrangebutwhatthey'resayingisthatpeoplewhowerereallyintothebabieswantedtopresstheircheeksormaybesqueezetheirslightlyfatlegs‘Totallynormal.Keepinmindthatwe'retalkingaboutaninnocentlittlesqueezenotanurgetoactuallydoanyharm. ButwhydoesithappenOrianaAragonascientistsaysit'scommonforsomepeoplewhoexperienceastrongemotiontoimmediatelyexpresstheirfeelingsinawaythatseemstobeoppositetowhatthey'refeeling.Likecryingwhenyou'rehappyorlaughingwhenyou'resad.Thesamethingisgoingonwhenyouwanttosqueezethatbabyrabbit.Itservesanactualbiologicalfunction.Accordingtothestudyithelpsreestablishyourcmolionalequilibrium.Inotherwordsitkeepsyouremotions情感balanced. Alsoifyou'retakingcareofababyorbabyanimalyoursqueezingurgeactuallyhelpsyoubeabeltercaretaker.AragonsaysBecausetheymayhelppeopletoregaincontrolovertheirstrongemotionstheseexpressionshelpthecaretakertocareforananimalorbabyappropriately. 1WhatdoestheunderlinedwordpeculiarinParagraphIprobablymean A.Normal. B.Popular. C.Desperate. D.Strange. 2WhichcanbeclassifiedasaggressiveexpressionsintheYalestudy A.Topressababy'snosesoftly. B.Tomakeababylaugh. C.Tosqueezeababy'slegstopieces. D.Tobreakababy'sfingers. 3What'sthebiologicalfunctionofpeople'scryingwhentheyarehappy A.Tohidetheirtheirfeelings. B.Tobalancetheirstrongfeelings. C.Todrawothers'attention. D.Toexpresstheiractualsadness. 4WhatdoesAragonthinkofacaretaker'ssqueezingurge A.It'squitedangerous. B.Itshouldbecontrolled. C.It'sactuallybeneficial D.It'sthemostappropriate.
6分PreschoolChineseTeacherJuliaGabrielCentre&ChittemHouse •CandidatemustpossessatleastaBachelofsDegree; •Atleast2yearsoffull﹣timeworkingexperienceintherelatedfield; •RequiredSkills:ClassroommanagementEarlyYearsEducationArtandCraftMusicMicrosoftOfficeStorytellingDramaLessonPlanning; •AbletospeakclearstandardChinese; •AvailableinMarch2019 Website:http://www.juHagahnel.comTelephoneNo:03﹣20955500FulMimeChineseTeacherBrainyKidsLearningCentre •CandidatemustpossessatleastaPostGraduateDiploma; •Atleast3yearsoffull﹣timeworkingexperienceinChineseteaching; •TeacherCertificateisrequirediftheapplicant'sdegreeisnotinEducation; •rmemationalexperienceespeciallyinAsiaishighlyvalued; •Immediatetyavailable. Website:hup:www.hrainykids.comTelephoneNo:03﹣62768755PrimarySchoolChineseTcacherNilaiInternationalSchool •CandidatemusthaveatleastaPostGraduateDiploma; Acertificateineducationisrequired; •Atleast4years'fulMimeexperienceinteachingChinese; •Computerliteracyandexcellentcommunicaiionandinterpersonalskills; •Abletostartworkinmid﹣September2019. Website:http:www.nis.edu.myTelephoneNo:06﹣85002188PartTimeChineseTutorMindStretcherEducation •CandidatemustpossessatleastaBachelor'sDegree; •MuiUbeexpertinChineseduetoworknature; •Experienceinteachingwillhsvcanaddedadvantage; •RequiredSkills:ComputerSkillMicrosoftOffice; •AbletostartworkinJuly2019. Website:http://wwwjnse.edu.wtyTclcphoneNo:603﹣79876366 1WhichoffersuitsyouifyouarcnotavailableuntilAugust2019 A.Jul.aGabrielCentre&ChiltcmHouse. B.BrainyKidsLearningCentre C.NilaiIntentionalSchool. D.MindStretcherEducation. 2Whichpositionisopentofreshgrdduates A.ChineseTeacher. B.Full﹣timeChineseTeacher. C.SchoolChineseTeacher. D.PanTimeChineseTutor. 3What'sthesimilarrequirementofthefourpositions A.PostGraduateDiploma. B.AgoodcommandofChinese. C.Imemauonalexperience. D.Excellentcomputerskills.
下列说法中正确的是
小芳的妈妈买了一台洗衣机妈妈交给小芳一张洗衣机说明书如表所示和四个需要小芳解答的问题小芳的答案如下其中不正确的是
8分FridaywouldbeSamiaandSalem'sweddingday!Everyoneinthevillagewasexcitedandwasbusypreparingforthehappyevent.ThevillagerswereveryproudofSalemasheworkedlonghoursandcaredaboutthepeopleinhisvillage.Whileotherswereenjoyingthepreweddingcelebrationstogetherwiththenursesthegroomwasbusydeliveringababyinhisclinic. Thebridewasinherroomhappilyarrangingherhairandmake﹣upgettingreadyforthearrivalofherguests.Herfamilyandfriendshadexcitedlypreparedthehenna涂指甲花party.GrandmaandMumwerebusyinthekitchenwiththefoodtheyhadmadeforthehennafeastforthedaybeforeFriday.Samia'sfriendMariamwasmakingtheweddingcake.HerfriendShaikhawascollectingthebride'sdressfromthetailor.At12noonthehennamakerarrived.Followingthetraditionshestarteddecoratingthebride'shands.Therewasanairofexcitementintheroom.Grandmastartedsingingatraditionalfolksong. Suddenlythebridefeltastrangetingling麻刺感inherhand.Itgrewworseandworse.Herhandbecameredandswollensoon.GrandmasaidOhdearIthinkitbestthatyouwashyourhandsimmediately.AsanemergencyfirstaiderMariamsuggestedapplyingsomecoldcreamonSamia'shandandranoffandreturnedwithsomeinherhand.Neitheroftheseworked.MumtookcontrolandphonedSalembutinvain.WithouthesitationshetookSamiatothehospitalurgentlywithDadandotherfriends.DrAhmedlookedatherhandandsaidYou'vehadanallergicreactiontothehenna.Tomorrowisyourwedding.WhataboutdrawingthehennausingbodycolorsEveryonesmiled. 1WhatwasSalemdoingthedaybeforethewedding A.Workingwiththenurses. B.Decoratingthebride'shands. C.Preparingfortheweddingcake. D.Visitingthetailorfortheweddingsuit. 2WhateventtookplaceinthevillageonThursday A.Celebratingaweddingceremony. B.Holdingababy'sbirthdayparty. C.Havingafeastparty. D.Orderingtheweddingdress. 3WhydidMariamrunawaywhenshesawwhathappenedtoSamia A.Togetsomewater. B.Tocallafirstaider. C.ToinformSamia'smother. D.Tofetchsomecream. 4HowdidSamia'smotherfeelfacingtheemergency A.Regretful. B.Calm. C.Powerful. D.Nervous.
8分ManyofusknowaboutRussia'sLakeBaikalfromourtextbooksorbylisteningtoChinesesingerLiJian'shitsongLieBaikal.Butoverthepastdecadetheworld'sdeepestfreshwaterlakehasbeeninthespotlightforanextremesport.EachMarchsince2005about150peoplefromaroundtheworldsignupfortheBaikalIceMarathon.Theycometoexplorethelake'sbreathtakingbeautyandchallengethemselvesinunpredictableconditions.The26﹣mile41.84﹣kilometersjourneystartsonthelake'seasternshore.InMarchtheiceisameterthickandiron﹣hard.Runnerscrossthisfrozensurfacefinishingonthewesternsideofthelake.KnownastheblueeyeofSiberiaLakeBaikalhasexceptionallyclearwaters.Thismeansitsiceisalmostperfectlytransparent透明的.Seenfromabovearunnerontheicelooksasifheorshewerejoggingthroughspace.TheNewYorkTimesnoted.Thelandscapemightbebeautifulbutit'salsoharsh.Strongwindsblast侵袭acrossthelakeandfrostbitecanoccurwithinhalfanhour.Runnerssaythecoldclimateiswhatdrawsthem.Theywanttotesttheirlimits.Whenyouareinsuchanenvironmentyoudon'thavecarsaroundyouandyoudon'thavethenoisearound.Ithinktheseextremeracesallowyoutobealonewithnature.AlicjaBarahonaa64﹣year﹣oldrunnerfromtheUStoldABCnews.Thelocationofferssomestrangeanduniquecharacteristicsforthismarathon.Thefinishinglineisvisiblefromthestartbuttheendlesswhiteoffersnoprogressmarkers.Theracealsoendswithlittlefanfare隆重的欢迎.Touristscrowdingtheicearemostlyaddictedtosnappingselfies自拍andjustignoretherunners.Forsomerunnerstheabsenceofspectatorsmakestheracemorechallengingbecauseit'slonely.Theymustfightwiththemselves.YouarealoneonBaikal.Itisyourrace.Youarealonewithyourself.Allyouneedtodoistodefeatyourself.VeroniqueMessinaaFrenchrunnertoldtheTelegraph.1WhatcanweknowabouttheBaikalIceMarathonfromthearticleA.Ittakesrunnersfromthenorthernendtothesouthernendofthelake.B.Itinvolvesextremeweatherandbeautifulscenery.C.Itattractsmoreandmoreparticipantseachyear.D.Itisabout26kilometersinlength.2HowdoestheBaikalIceMarathondifferfromothermarathonsA.Onlymenareallowedtoruninthisrace.B.Therunnersareoftendistractedbytourists.C.Therearemanyprogressmarkersontheice.D.Therunnerscanseethefinishinglinefromthestart.3WhatisthemostchallengingpartoftheraceforMessinaA.Thecoldclimate.B.Thelongdistance.C.Noisysurroundings.D.Loneliness.4HowmanyreasonsarelistedtoshowthelonelinessA.5.B.4.C.3.D.2.
15分WhydosomanypeoplereachsuccessandthenfailOneofthebigreasonsisthatwethinksuccessisaone﹣waystreet.Whenwesucceedwestopdoingeverythingthatmadeussuccessful1sitbackinourcomfortablezone.Soitdoesn'ttakelongtogodownhill.I2workhardbeforereachingsuccess.OnceIwasgoodatcomingup3creativeideasanddidwhatIloved.ButthenIstoppedbecauseIthoughtImadeitandIcanrelax.IthoughtIwas4ableguyandIshouldn'thavetoworkatideasandgotintothethingsthatIdidn'tlovelike5manage.Iwastheworld's6badmanagerbutImustdoitbecauseIwasthepresidentofthecompany.Iseemedverysuccessfulbutactuallyvery7depress.Itdidn'ttakelongforbusinesstodroplikearock.8savemoneyIhadtoletallmyemployeesgo.Idid9tookmebacktosuccess.Finallybusinessgrewbiggerthanever.Successisn'taone﹣waystreetbuta10continuejourney.Oncewearesuccessfulweshouldstillmoveonbecausethatisnotonlyhowweachievesuccessbutit'showwekeepit.
在图中所示的电路中电源电压保持不变灯泡L1L2分别标有“6V3W”和“6V6W”字样若开关S1断开S2闭合时恰好有一只灯泡正常发光当开关S1断开S2闭合时与开关S1闭合S2断开时电流表的示数之比为23设灯丝电阻不随温度变化．求 1开关S1断开S2闭合时电压表和电流表的示数 2电路消耗的最大电功率和最小电功率．
6分ConsideringthetemperateclimateinEnglandmosttouristsliketovisitLondonbetweenAprilandSeptember.TouristsalsoenjoywhatLondonhastoofferduringChristmas. GettingaroundLondon TransportationinLondonisdividedintozonesmeaningthefurtheryouintendtogothemoreexpensiveitwillcostyou.You'llfindoneofthebestsubwaysherewithsingleridesstartingatabout﹩2.5.Youcanalsousetaxiskeepinmindthatblackcabsdonotacceptsmartcardsboatsbusesaswellascommutertrains市郊火车.Toavoidanytroubleyoucangetyourselfasmartcardandperhapsloaditwith﹩50dollarstocoveryourweeklytravelbudget. LondonWeather ToenjoywarmweatherinLondonplanyourvisitinJulyasitisthehottestmonth.JanuaryisthecoldestmonthinLondon. WhatyoushouldKnowBeforeVisitingLondon UnlikemostcitiesinEuropelifeinLondonisabitmoreexpensive.Alsomakesureyouplanaheadsothatyoudon'tmissoutonthebestticketshotelsandoffers. BESTOFLONDON SEALIFELondonAquarium EnjoyaspectacularexperiencewithunderwatercreaturesatSEALIFELondonaquarium.Itisperfectforafamilyfunday. TheCoca﹣ColaLondonEye AmajorfeatureofLondon'sskylinetheTheCoca﹣ColaLondonEyeboastssomeofthebestcityviewsfromits32capsules.You'lldefinitelyenjoythebreathtakingexperience. SherlockHolmesMuseum Aperfectplacetovisitifyoulovebooksandmusic. 1ThepeakmonthtovisitLondonismostlikelytobe. A.January B.March C.May D.October 2Whatisgoodaboutasmartcard A.Itcanbepaidforanytransportmeans. B.Itcancoveranyexpenses. C.Itisavailableonline. D.Itisconvenient. 3lfyourfamilywanttoseeavarietyoffishyouwillgoto. A.SEALIFELondonAquarium B.TheCoca﹣ColaLondonEye C.SherlockHolmesMuseum D.LondonCanalMuseum
对于静止在水平桌面上的文具盒下列说法中正确的是
如图所示下列四种现象中属于增大压强的是
25分假设你是张华你的英国笔友Michael即将到中国来学习并在中国过中秋节.他发来电子邮件询问有关中秋节的习俗.请你用英语写一封100词左右的回信介绍一下有关情况. 内容要点: 1.中秋节通常在九月或十月我们吃各种月饼; 2.人们喜欢在户外边吃月饼边赏月; 3.中秋节是家人团聚的日子回顾过去展望未来. 开头和结尾已给出不计入总词数. DearMichael Yours ZhangHua
小华家在农村还没用上天燃气使用的是瓶装液化气．如果每瓶中装入20kg液化气液化气的热值取4.2×107J/kg则每瓶液化气全部完全燃烧放出的热量是J若放出的热量有50%被利用在标准大气压下可把kg的水从20℃加热至沸腾c水＝4.2×103J/kg•℃．一次烧水过程中水烧开后她看到锅盖向上跳动其原因是水蒸气的能转化为锅盖的能．大气压为一标准大气压
发电机的工作原理是它能将能转化为能田湾核电站是利用核产生的能量发电的选填“裂变”或“聚变”．
10分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. IwasusedtobeahealthygirlbutmorethantwoyearsagoIgetintothehabitofeatingalotofjunkfoodandsnacks.InadditionIspentalotoftimelayonthesofawatchingTVanddoinglittleexercise.AsaresultIputonsuchmuchweightthatIfounddifficulttoclimbthestairs.SoIdecidedtochangemyunhealthylifestyle.Ibegantohaveabalancingandhealthydiet.Ialsotookpartinvarioussportsactivitysuchasswimmingskatingrunningorplayingbasketball.OneyearlateIbecameasfitasbefore.
30分ImadeaspeechatEtonSchoollastyear.Whenthe1wasovertheheadmasteraskedmeifIwouldvisitan2student.Anillnesshadkepttheboyhomebuthehadexpressedaninterestin3meandtheheadmasterknewitwould4muchtohim.I5.Duringthenine﹣miledrivetohishomeI6somethingsaboutMatthewwhohadamuscledisease.Whenhewasbornthe7toldhisparentshewouldnotliveto5.Hewas13andfromwhatIwastolda8fighter.Hewantedtomeetme9Iwasagold﹣medalpowerlifterandIknewabout10difficultiesandgoingformydreams. Ispentoveranhour11withMatthew.Neveroncedidhecomplain抱怨oraskWhymeHespokeaboutwinningand12andgoingforhisdreams.13heknewwhathewastalkingabout.Hedidn't14thathisclassmateshadmadefunofhimbecausehewasdifferent;hejusttalkedabouthis15forthefutureandhowonedayhewantedto16weightswithme. WhenwefinishedtalkingIwentintomysuitcaseand17outthefirstgoldmedalIwonforpowerliftingandputitaroundhis18.Itoldhimhewasmoreofa19.HelookedatitforamomentandthenreturnedittomeandsaidRickyouareachampion.You20thatmedal.SomedaywhenIgettotheOlympicsandwinmygoldmedalIwillshowittoyou. 1A.program B.performance C.procedure D.story 2A.smart B.distinguished C.energetic D.special 3A.interviewing B.approaching C.greeting D.meeting 4A.reflect B.mean C.improve D.matter 5A.agreed B.understood C.smiled D.hesitated 6A.putaside B.foundout C.turnedto D.gaveaway 7A.officials B.teachers C.doctors D.colleagues 8A.real B.hard C.helpless D.serious 9A.after B.before C.unless D.because 10A.admitting B.avoiding C.overcoming D.recognizing 11A.declaring B.chatting C.predicting D.arguing 12A.seeking B.relaxing C.succeeding D.working 13A.Bravely B.Finally C.Disappointedly D.Obviously 14A.mention B.notice C.doubt D.realize 15A.methods B.lives C.hopes D.questions 16A.lose B.support C.bear D.lift 17A.carried B.pulled C.dragged D.kicked 18A.hand B.shoulder C.neck D.head 19A.winner B.helper C.reader D.survivor 20A.adopted B.earned C.designed D.used
10分Nowadayspeoplewanttoknowyourwebsite.1Yourwebsiteisanelectronicmeetingplaceforyourfamilyfriendsandpotentiallymillionsofpeoplearoundtheworld.Bestofallyoumaynothavetospendacent.Thewebisfilledwithallkindsoffreeservicesandallittakesissometimeandcreativity.Thinkofyourhomepageasthestartingpointofyourwebsite.2Yoursitecanhaveoneormorepagesdependingonhowyoudesignit.Whilewebpagesvarygreatlyintheirdesignandcontentmostuseatraditionalmagazinelayout.Atthetopofthepageisabanner横幅.Nextcomesagreetingandshortdescriptionofthesite.Picturestextsandlinkstootherwebsitesfollow.Beforeyoustartbuildingyoursitedosomeplanning.3Nextgatherupthematerialsthatyouwanttoputonthesite.Whiletherearenorulesyouhavetofollowthereareafewthingstokeepinmind.4Ifyouwanttoomuchatthebeginningyoumaynevergetthesiteofftheground.Youcanalwaysaddtoyoursite.Lessisbetter.Mostpeopledon'tliketoreadalotoflongtextsonline.Breakitintosmallpieces.Sinceitcantakealongtimetodownloadlargefiles.Havetheright.Don'tputanymaterialonyoursiteunlessyouaresureyoucandoitlegally.5.A.Startsimply.B.Makeitcolorful.C.Drawaroughlayoutonasheetofpaper.D.Thinkaboutwhomthesiteisforandwhatyouwanttosay.E.Alwaysremembertogetthepermissionfromthewriterfirst.F.Havingawebaddressisalmostasimportantasowingastreetaddress.G.Likethetableofcontentsofabookormagazinethehomepageisthefrontdoor.
小明同学欲研究通过导体的电流跟导体电阻的关系图甲是他设计的实验电路．1在实验过程中他保持电源电压不变通过改变AB间R的电阻值测得相应的电流值如表1所示．小明分析表1中数据发现总结不出电流跟电阻的定量关系其原因是．表12小明认真反思自己的实验过程后找出了自己的错误所在并采取了正确的实验操作．你认为小明每次改变电阻后接下来的正确操作是．3正确操作实验后小明将得到的实验数据记录在表2中分析表2中的数据你能得出的结论是．表24同组的小丽同学将小明设计的电路进行了改进在AB间接入电阻箱来代替定值电阻．如图乙所示你认为这样做的好处是．
如图所示一束光从空气斜射向水面入射光线及法线已画出．请画出这条入射光线的反射光线和折射光线的大概位置．
8分Theregularworldpresentedtousbyourfivesenses﹣youcouldcallitreality1.0﹣isnotalwaysthemostuser﹣friendlyofplaces.Wegetlostinunfamiliarcities;wemeetpeoplewhoselanguagewedon'tunderstand.Sowhynottrytheimprovedversion:augmentedrealityARorreality2.0ARtechnologyaddscomputer﹣producedimages图象ontherealworldviaamobilephonecameraorspecialvideoglasses. EarlyformsofARarealreadyhere.WiththerightdownloadssmartphonescandeliverinformationaboutnearbyATMsandrestaurantsandotherpointsofinterest.Butthat'sjustthebeginning.Afewyearsfromnowthequantityofinformationavailablewillhaveincreasedhugely.Youwillnotonlyseethatthere'saChineserestaurantonthenextblockbutyouwillbeabletoseethemenuandreadreviewsofit. Thisiswherethenextrevolutionincomputingwilltakeplace:intheinterface界面betweentherealworldandtheinformationbroughttousviatheInternet.Imaginebubblesfloatingbeforeyoureyesfilledwithcoolinformationaboutanythingandeverythingthatyouseeinfrontofyou. Let'sjumpaheadtotenyearsfromnow.Apersontryingtofixtheircarwon'tbereadingabookwithpictures;theywillbewearingadevicethatprojectsanimated3﹣Dcomputergraphicsontotheequipmentunderrepairlabellingpartsandgivingstep﹣by﹣stepguidance. ThewindowontotheARworldcanbeasmartphoneorspecialvideoglasses.Butintenyears'timethesewillhavebeenreplacedbycontactlenses隐形眼镜withtinyLEDswhichpresentsomethingatareadabledistanceinfrontoftheeye.Soadeafpersonwearingtheselenseswillbeabletoseewhatpeoplearesaying. Thequestioniswhileweareallabsorbedinournewaugmentedrealityworldshowwillwebecommunicatingwitheachother 1Whatdoesthetextmainlytalkabout A.Thenextinformationtechnologyrevolution. B.Earlyformsofaugmentedrealitytechnology. C.Thedifferencesbetweenreality1.0andreality2.0. D.Therelationshipbetweenpeoplelivinginreality2.0. 2WhatdoestheunderlinedworditrefertoinParagraph2 A.Themenu. B.Theblock. C.Therevolution. D.Therestaurant. 3WhataretinyLEDsusedtodo A.Protectpeople'seyes. B.Showtextandimages. C.Warnusersofdangers. D.Replacevideoglasses. 4What'stheauthor'sattitudetowardsARtechnology A.Doubtful. B.Disapproving. C.Favourable. D.Ambiguous.
热门题库
更多
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
教案备课库
高一下学期数学
教案备课库
高一上学期数学
高一上学期化学
教案备课库
教案备课库
湘公网安备 43130202000226号