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已知命题p:∃x∈R,kx2+1≤0,命题q:∀x∈R,x2+2kx+1>0. (1)当k=3时,写出命题p的否定,并判断真假; (2)当p∨q为假命题时,求实数k的取值范围.
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高二上学期数学《》真题及答案
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已知命题p∃x∈R.使tanx=1命题qx2-3x+2
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q是假命题
綈p是假命题
綈q是假命题
已知命题px∈Rcosx=命题q∀x∈Rx2-x+1>0则下列结论正确的是
命题p∨q是假命题
命题p∧q是真命题
命题(¬p)∧(¬q)是真命题
命题(¬p)∨(¬q)是真命题
已知命题p∀x∈R2x<3x命题q∃x∈Rx3=1-x2则下列命题中为真命题的是
p∧q
(┐p)∧q
p∧(┓q)
(┓p)∧(┓q)
已知命题p∃x0∈R.使sinx0=命题q∀x∈R.都有x2+x+1>0.给出下列结论①命题p∧q是
②③
②④
③④
①②③
已知命题p∃x0∈R.x02<x0命题q∀x∈R.x2﹣x+1>0则下列命题中为真命题的是
p∧q
p∧¬q
¬p∧q
¬p∧¬q
已知命题P.函数fx=2a﹣5x是R.上的减函数.命题Q.在x∈R.时不等式x2﹣ax+2>0恒成立
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已知命题p∃α∈R.cosπ-α=cosα命题q∀x∈R.x2+1>0.则下面结论正确的是
p∧q是真命题
p∧q是假命题
綈p是真命题
p是假命题
已知命题px0∈R.使2x0+2-x0=1命题qx∈R.都有lgx2+2x+3>0.下列结论中正确的
命题“綈p∧q”是真命题
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命题“p∧q”是真命题
命题“綈p∨綈q”是假命题
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命题p∧q是真命题
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q)是真命题
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p∧q
(﹁p)∧(﹁q)
(﹁p)∨q
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p∧¬q
¬p∧q
¬p∧¬q
p∧q
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Bodylanguageisthequietsecretandmostpowerfullanguageofall!Itspeaks21thanwords.Accordingtospecialistsourbodiessendoutmore22thanwerealize.Infactnon﹣verbalcommunicationtakesupabout50%ofwhatwereally23.Andbodylanguageisparticularly24whenweattempttocommunicateacrosscultures. Indeedwhatiscalledbodylanguageisso25apartofusthatit'sactuallyoftenunnoticed.Andmisunderstandingsoccurasaresultofit.26differentculturestreatthe27betweenpeopledifferently.NorthernEuropeansusuallydonotlikehaving28contactevenwithfriendsandcertainlynotwith29.PeoplefromLatinAmericancountries30toucheachotherquitealot.Thereforeit'spossiblethatin31itmaylooklikeaLatinois32aNorwegianallovertheroom.TheLatinotryingtoexpressfriendshipwillkeepmoving33.TheNorwegianveryprobablyseeingthisasrudebehaviorwillkeep34﹣whichtheLatinowillinreturnregardas35 Obviouslyagreatdealisgoingonwhenpeople36.Andonlyapartofitisinthewordsthemselves.Andwhenpartiesarefrom37culturesthere'sastrongpossibilityof38.Butwhateverthesituationthebest39istoobeytheGoldenRule:treatothersasyouwouldliketobe40. 21.A.straighter B.louder C.harder D.further 22.A.sounds B.invitations C.feelings D.messages 23.A.hope B.receive C.discover D.mean 24.A.immediate B.misleading C.important D.difficult 25.A.well B.far C.much D.long 26.A.Forexample B.Thus C.However D.Inshort 27.A.trade B.distance C.connections D.greetings 28.A.eye B.verbal C.bodily D.telephone 29.A.strangers B.Relatives C.neighbors D.enemies 30.A.inotherwords B.ontheotherhand C.inasimilarway D.byallmeans 31.A.trouble B.conversation C.silence D.experiment 32.A.interrupting B.helping C.guiding D.following 33.A.closer B.faster C.in D.away 34.A.steppingforward B.goingon C.backingaway D.comingout 35.A.weakness B.carelessness C.friendliness D.coldness 36.A.talk B.travel C.laugh D.think 37.A.different B.similar C.Latin D.European 38.A.curiosity B.excitement C.misunderstanding D.nervousness 39.A.chance B.time C.result D.advice 40.A.noticed B.treated C.respected D.pleased
Anycaraccidentisfrighteningbutanaccidentinwhichyourvehicleisthrownintothewaterwithyoutrappedinsideislyterrifying.36Howevermostdeathsresultfrompanicwithoutaplanorunderstandingwhatishappeningtothecarinthewater.Byadoptingabrace支撑positionactingdecisivelyandgettingoutfastyoucansaveyourselffromasinkingvehicle. Braceyourselfforimpact撞击力.Assoonasyou'reawarethatyou'regoingofftheroadandintoabodyofwateradoptabraceposition.Theimpactcouldsetofftheairbagsysteminyourvehiclesoyoushouldplacebothhandsonthesteeringwheelinthetenandtwoposition. Undoyourseatbelt.37Untiethechildrenstartingwiththeoldestfirst.Forgetthecellphonecall.Yourcarisn'tgoingtowaitforyoutomakethecall. 38Leavethedooraloneatthisstageandconcentrateonthewindow.Acar'selectricalsystemshouldworkforuptothreeminutesinwatersotrythemethodofopeningitelectronicallyfirst.Manypeopledon'tthinkaboutthewindowasanescapeoptioneitherbecauseofpanicormisinformationaboutdoorsandsinking. Breakthewindow.Ifyouaren'tabletoopenthewindoworitonlyopenshalfwayyou'llneedtobreakitwithanobjectoryourfoot.Itmayfeelcounter﹣intuitive有悖常理的toletwaterintothecar.39 Escapewhenthecarhasequalized.Ifithasreachedthedramaticstagewherethecarcabinhasbeenfilledwithwaterandithasbecomebalancedyoumustmovequicklyandeffectivelytoensureyoursurvival.40Whilethereisstillairinthecartakeslowdeepbreathsandfocusonwhatyou'redoing. A.Openthewindowassoonasyouhitthewater. B.Survivingasinkingcarisnotasdifficultasyouthink. C.Ittakes60to120secondsforacartofillupwithwaterusually. D.Suchaccidentsareparticularlydangeroustotheriskofdrowning. E.Inconclusionifyouknowwhattodointhewateryouwillbesafe. F.Thisisthefirstthingtoattendtoyetitoftengetsforgotteninthepanic. G.Butthesoonerthewindowisopenthesooneryoucanescapedirectlythroughit.
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JaneEyre JaneEyreanovelwrittenbyCharlotteBrontewaspublishedin1847inEngland.ItisCharlotteBronte'smostfamousbook.JaneEyreisalovestory.IttellsaboutayoungandindependentwomancalledJaneEyrewhoisbraveenoughtopursueherownlove. UncleTom'sCabin UncleTom'sCabinisananti﹣slaverynovelbyAmericanauthorHarrietBeecherStowe.Publishedin1852thenovelhelpedlaythebasefortheCivilWaraccordingtoWillKaufman.WhenAbrahamLincolnmetStoweatthestartoftheCivilWarLincolndeclaredSoitisthelittleladywhostartedthisgreatwar.ThecharacterofUncleTominthenovelisalongsufferingblackslave.Thesadnovelexposestherealityofslavery. GonewiththeWind GonewiththeWindisanovelbyMargaretMitchellin1936.IttellsthestoryofScarlettO'HaraandheradventuresintheAmericanSouthduringtheCivilWar.ShefallsinlovewithRhettButleracitygentleman.Itisoneofthemostfamousbooksofitstimeandwasmadeintoamoviewiththesamename.ThetitletookitsnamefromthelinesanErnestDowsonpoem:IhaveforgottenmuchCynara!Gonewiththewind.Thislinealsoappearsinthebook.ThebookwonthePulitzerPrizeonMay31937. RichDadPoorDad RichDadPoorDadisabookbyRobertKiyosakiandSharonLechter.InthestoryRobert'sownfatherwasthesuperintendent厅长ofeducationinHawaiiandendupdyingpenniless.Hisbestfriend'sfatherdroppedoutofschoolatage13andwentontobecomeoneofthewealthiestmeninHawaii.Itadvocatesfinancialindependencethroughinvestingrealestate地产owningbusinessesandtheuseoffinanceprotectiontactics. 21.WhosebookhadagreatimpactontheCivilWarintheU.S.? A.CharlotteBronte's. B.HarrietBeecherStowe's. C.MargaretMitchell's. D.RobertKiyosakiandSharonLechter's. 22.WherewasthenameofthebookGonewiththeWindtakenfrom? A.Anadventurousstory. B.TheCivilWar. C.Apoem. D.ThePulitzerPrize. 23.WhowillbeinterestedinthebookRichDadPoorDad? A.Awomanwhoiseagerforfreelove. B.AhistorianwhostudiesthehistoryoftheU.S.A. C.Abusinessmanwhowantstobewealthy. D.Apoliticianwhowarnstoenterpolitics.
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Australiahaspromisedtointroducethemostcomprehensive全面的carbontradingprogramoutsideEuropein2010.ThegovernmentinCanberraplanstocutgreenhousegasemissions排放byatleastfivepercentby2020butitcouldmakebiggerreductionsifothercountriesagreetotoughertargets. TheAustraliangovernmentwarnsthatwithouttoughenvironmentalmeasuresthecountrycouldlosekeyindustriesandjobs.ClimateChangeMinisterPennyWongsaystheeconomyisunderthreatanddecisiveactionisneeded. Centraltothegovernment'sclimatechangeplanisacarbonemissionstradingprogramthatwillbeintroducedwithintwoyears.Itwouldinvolveonethousandofthenation'sbiggestcompaniesandwouldcoveraboutthree﹣quartersofAustralia'sgreenhousegasemissions. Manyscientistsbelievethatgreenhousegasessuchascarbondioxideandmethanecontributetoglobalwarming.Manyofthemarereleasedbyburningfuelssuchascoalandoil. Companieswillberequiredtobuypermitsforeachtonofcarbontheyemitalthoughbigpollutingexporterswillreceiveupto90percentoftheircarbonlicensesfree. ManybusinessleaderswantthegovernmenttodelaytheplanbecauseofthecurrentglobalfinancialcrisiswhichisslowingtheAustralianeconomy.PeterAndersonfromtheAustralianChamberofCommerceandIndustrysaysitisirresponsibletobringinacarbontradingplannow. EnvironmentalistsontheotherhandsayPrimeMinisterKevinRuddhasnotproperlyaddressedthethreatofclimatechange.Activistshadsoughtaminimumemissionscutof25percent. InsteadtheRuddgovernmentaimstocutscarbonemissionsbyatleastfivepercentof2000levelsby2020.Thatamountcouldriseto15percentiffutureglobalagreementssetsuchatarget. RayNiasoftheenvironmentalgroupWWFsaysAustraliawillpaythepriceforlowtargets.ThisisadeeplydeeplydisappointingtargetNiassaid.ItcommitsAustraliatolong﹣termclimatechange.ItwillmakeAustralia'sabilitytonegotiate协商globalagreementsveryverydifficult.Itismuchlowerthanevenwehadimagined. Australiahasoneofthehighestper﹣persongreenhouseemissionsratesintheworldbecauseofitsrelianceoncoalforelectricity. SomescientistswarnthatthevastdryAustraliancontinentwhichhasbeensufferingaseriesofdroughtsinrecentyearscouldbeoneoftheregion'shardesthitbyglobalwarming. 28.Whichgroupsupportstocutcarbonemissionsbyatleast25%? A.EnvironmentalistsB.ThegovernmentC.BusinessleadersD.Scientists 29.Whomostprobablyagreestoahighergoalofcarbonemissions? A.PennyWongB.PeterAndersonC.KevinRuddD.RayNias 30.ManybusinessleadersareagainsttheAustralianprogrambecause. A.theybelievetheprogramwillonlybenefitthebigcompanies B.theybelievetheprogramwillcausetheglobalwarming C.theydon'twanttopayextramoneyforcarbonemissions D.theydon'tthinkcarbonemissionwillsurelycausetheglobalwarming 31.Theunderlinedsentencemeans. A.TheAustraliangovernmentwillbeblamedforthelowtarget B.Australiawillsufferalotfromclimatechangecausedbycarbonemissions C.TheAustraliangovernmentwillhavetospendlotsofmoneyoncarbonemissions D.ManyAustraliancompanieswillclosedownbecauseofthelowtarget.
Ifyouareafruitgrower﹣orwouldliketobecomeone﹣takeadvantageofAppleDaytoseewhat'saround.It'scalledAppleDaybutinpracticeit'smorelikeAppleMonth.ThedayitselfisonOctober21butsinceithascaughtoneventsnowspreadoutovermostofOctoberaroundBritain. Visitinganappleeventisagoodchancetoseeandoftentasteawidevarietyofapples.TopeoplewhoareusedtothelimitedchoiceofapplessuchasGoldenDeliciousandRoyalGalainsupermarketsitcanbequiteaneyeopenertoseetherangeofclassicalapplesstillinexistencesuchasDeciowhichwasgrownbytheRomans.Althoughitdoesn'ttasteofanythingspecialit'sstillworthatryasistheknobbly多疙瘩的Cat'sHeadwhichismoreofacuriositythananythingelse. Therearealsovarietiesdevelopedtosuitspecificlocalconditions.OneoftheverybestvarietiesforeatingqualityisOrleansReinettebutyou'llneedawarmshelteredplacewithperfectsoiltogrowitsoit'sapipedreamformostappleloverswhofallforit. Attheeventsyoucanmeetexpertgrowersanddiscusswhichoneswillbestsuityourconditionsandbecausethesearefamilyaffairschildrenarewellcateredforwithapple﹣themedfunandgames. AppleDaysarebeingheldatallsortsofplaceswithaninterestinfruitincludingstatelygardensandcommercialorchards果园.IfyouwanttohavearealorchardexperiencetryvisitingtheNationalFruitCollectionatBrogdalenearFavershaminKent. 1Whatcanpeopledoattheappleevents? A.Attendexperts'lectures. B.Visitfruit﹣lovingfamilies. C.Plantfruittreesinanorchard. D.Tastemanykindsofapples. 2WhatcanwelearnaboutDecio? A.Itisanewvariety. B.Ithasastrangelook. C.Itisrarelyseennow. D.Ithasaspecialtaste. 3WhatdoestheunderlinedphraseapipedreaminParagraph3mean? A.Apracticalidea.B.Avainhope.C.Abrilliantplan.D.Aselfishdesire. 4Whatistheauthor'spurposeinwritingthetext? A.Toshowhowtogrowapples. B.Tointroduceanapplefestival. C.Tohelppeopleselectapples. D.Topromoteappleresearch.
AmongallseasonsIlikesummerbest.FirstofallsummeriswhenschoolisoutandIcanspendmostofmytime21bothoutsideandin.Myparents22metogetoutinsunlightasmuchaspossible.ThisisfinesincemyfriendsandIliketo23together.Weoftengoonbiketripswhichgiveusalotof24.Besidestherearemoredaylighthoursto25.Thesunstaysoutlonger26sometimeaftereightintheevening.Thismeansthatthere'salotmore27.Icangoswimmingorjust28togetasuntan日光浴.Idon'twanttodoitfortoolong29Idon'twanttogetburnt.ThesunisthereasonwhyweoftentakeawalkoutsidewhichIbelievecanhelpusstay30.Thelastreasonisthatit'sthe31timeofyearforussincewedon'tgetverymuchsunnyweatherwherewe32.Formostoftheyearit'seithercooland33orcoldandicyinmycountry.Weonlyhavethreemonthsofreprieve缓解fromthe34weather﹣thatissummer.WhenmyneighborsandIwantto35thesummerwegoouthavebarbecues烤肉orjustsitandtalk36.Thisisagoodthingtodoatnightwhenthe37ofthedayremainsintheair.38summeristhetimeofyearthatreallyputstogethereverythingIliketo39.Itiscertainlytheseasonthat40memost.21.A.singing B.playing C.working D.studying22.A.force B.warn C.invite D.encourage23.A.goout B.lookback C.runaway D.standup24.A.luck B.time C.fun D.help25.A.keep B.enjoy C.take D.count26.A.finally B.possibly C.suddenly D.usually27.A.sunshine B.moonlight C.noise D.air28.A.run B.jump C.lie D.walk29.A.once B.because C.unless D.although30.A.busy B.simple C.young D.healthy31.A.warmest B.quietest C.hardest D.shortest32.A.getoff B.crossover C.comefrom D.hurrydown33.A.hot B.wet C.fine D.snowy34.A.lovely B.clear C.freezing D.terrible35.A.celebrate B.lookfor C.introduce D.waitfor36.A.loudly B.bravely C.happily D.politely37.A.order B.heat C.story D.smell38.A.Atfirst B.Infact C.Asusual D.Inshort39.A.teach B.answer C.experience D.examine40.A.interests B.worries C.touches D.hurts
ThefamoussingerXueZhiqianhadabigfightwithhisex﹣girlfriendontheInternetandmadeanannouncementthathewouldtakelactionagainstrumorthroughhislawyer.
Yourhousemayhaveaneffectonyourfigure.Expertssaythewayyoudesignyourhomecouldplayaroleinwhetheryoupackonthepoundsorkeepthemoff.Youcanmakeyourenvironmentworkforyouinsteadofagainstyou.Herearesomewaystoturnyourhomeintopartofdietplan. Openthecurtainsandturnupthelights.Darkenvironmentsaremorelikelytoencourageovereatingforpeopleareoftenlessself﹣consciouswhenthey'reinpoorlylitplaces﹣andsomorelikelytoeatlotsoffood.Ifyourhomedoesn'thaveenoughwindowlightgetmorelampsandfloodtheplacewithbrightness. Mindthecolors.Researchsuggestswarmcolorsfuelourappetites胃口.Inonestudypeoplewhoatemealsinablueroomconsumed消耗33percentlessthanthoseinayelloworredroom.Warmcolorslikeyellowmakefoodappearmoreappetizingwhilecoldcolorsmakeusfeellesshungry.Sowhenit'stimetorepaintgoblue. Don'tforgettheclock﹣﹣﹣ortheradio.Peoplewhoeatslowlytendtoconsumeabout70fewercalories卡路里permealthanthosewhorushthroughtheirmeals.Beginkeepingtrackofthetimeandtrytomakedinnerlastatleast30minutes.Andwhileyou'reatitactuallysitdowntoeat.Ifyouneedsomehelpslowingdownturnonrelaxingmusic.Itmakesyoulesslikelytorushthroughameal. Downsizethedishes.Bigservingbowlsandplatescaneasilymakeusfat.Weeatabout22percentmorewhenusinga12﹣inchplateinsteadofa10﹣inchplate.Whenwechoosealargespoonoverasmalleronetotalintake摄入jumpsby14percent.Andwe'llpourabout30percentmoreliquidintoashortwideglassthanatallskinnyglass. 1Thetextisespeciallyhelpfulforthosewhocareabout. A.theirhomecomforts B.theirbodyshape C.housebuying D.healthydiets 2Ahomeenvironmentinbluecanhelppeople. A.digestfoodbetter B.regaintheirappetites C.burnmorecalories D.reducefoodintake 3Whatarepeopleadvisedtodoatmealtimes? A.Fatquickly. B.Playfastmusic. C.Usesmallerspoons. D.Turndownthelights. 4Whatcanbeasuitabletitleforthetest? A.IsYourHouseMakingYouFat? B.WaysofServingDinner C.EffectsofSelf﹣Consciousness D.IsYourHomeEnvironmentRelaxing?
如图四边形ABCD中AB=BC=CD=DA=1S△ABDS△BCD分别表示△ABD△BCD的面积则S2△ABD+S2△BCD的最大值为.
Thenewly﹣releasedmobilephoneisthinandlightandtit'seasytocarryaround.
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