高三压轴信息卷数学理.docx
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高三压轴信息卷数学理.docx
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高三压轴信息卷数学理
xx高考数学(理科)信息卷
一、选择题:
本大题共12个小题,每小题5分,共60分.在每小题给出的四个选项中,只有一项是符合题目要求的。
1.若
()
A.B.C.D.
2.设,则“且”是“”的().
A.充分而不必要条件 B.必要而不充分条件
C.充分必要条件 D.既不充分也不必要条件
3.已知函数,则的反函数是()
A.B.
C.D.
4.在等差数列中,有,则此数列的前13项之和为()
A.24B.39C.52D.104
5.已知,,则的值为()
A.B.C.D.
6.如图,在中,是边上的点,且,,,则的值为().
A. B. C. D.
7.已知正三棱柱的侧棱长与底面边长都相等.点是线段的中点,则直线与侧面所成角的正切值等于()
A.B.C.D.
8.过点(1,1)的直线与圆相交于A,B两点,则|AB|的最小值为()
A.B.4C.D.5
9.有5张音乐专辑,其中周杰伦的3张(相同),郁可唯和曾轶可的各1张.从中选出3张送给3个同学(每人1张).不同送法的种数有()
A.120B.60C.25D.13
10已知中心在原点的椭圆与双曲线有公共焦点,且左右焦点分别为,且两条曲线在第一象限的交点为P,是以为底边的等腰三角形.若,椭圆与双曲线的离心率分别为,则的取值范围是
A.B.C.D.
11.四面体的外接球球心在上,且,,在外接球面上两点间的球面距离是( )
A.B.C.D.
12.对实数和,定义运算“”:
设函数
,.若函数的图象与轴恰有两个公共点,则实数的取值范围是().
A. B.
C. D.
二、填空题:
本大题共4个小题,每小题5分,共20分.把答案填写在题中横线上.
13.函数的最大值是.
14.展开式中,常数项是__________.
15.若平面向量α,β满足|α|≤1,|β|≤1,且以向量α,β为邻边的平行四边形的面积为,则α与β的夹角的取值范围是。
16在斜三棱柱中,底面是以∠ABC为直角的等腰三角形,点在平面ABC上的射影为AC的中点D,AC=2,=3,则与底面ABC所成角的正切值为.
三、解答题:
本大题共6个小题,共70分.解答应写出文字说明、证明过程或演算步骤.
17.(本小题满分10分)
在⊿中,角的对边分别为,且
(Ⅰ)求的值;
(Ⅱ)若,且,求的值.
18.为了比较注射两种药物后产生的皮肤疱疹的面积,选200只老鼠做试验,将这200只老鼠随机地分成两组,每组100只,其中一组注射药物(称为组),另一组注射药物(称为组),则两组老鼠皮肤疱疹面积(单位:
)的频率分布表、频率分布直方图分别如下.
(Ⅰ)为方便两组试验对比,现都用分层抽样方法从两组中各挑出20只老鼠,求两组皮肤疱疹面积同为的这一区间应分别挑出几只?
(Ⅱ)在(Ⅰ)的条件下,将两组挑出的皮肤疱疹面积同为这一区间上的老鼠放在一起观察,几天后,从中抽取两只抽血化验,求组中至少有1只被抽中的概率.
19.(本题满分12分)如图,在平行四边形ABCD中,AB=2BC,∠ABC=120°。
E为线段AB的中点,将△ADE沿直线DE翻折成△A’DE,使平面A’DE⊥平面BCD,F为线段A’C的中点。
(Ⅰ)求证:
BF∥平面A’DE;
(Ⅱ)设M为线段DE的中点,求直线FM与平面A’DE所成角的余弦值。
20.(本小题满分12分)
已知数列的前n项和为,且(),
(1)求证:
数列是等比数列;
(2)设数列的前n项和为,
,试比较与的大小.
21.椭圆C的中心为坐标原点O,焦点在y轴上,离心率e=
,椭圆上的点到焦点的最短距离为1-
直线与y轴交于点P(0,m),与椭圆C交于相异两点A、B,且.
(1)求椭圆方程;
(2)若求m的取值范围.
22.(本题满分12分)
已知函数,其中为实数.
(Ⅰ)当时,求曲线在点处的切线方程;
(Ⅱ)是否存在实数,使得对任意,恒成立?
若不存在,请说明理由,若存在,求出的值并加以证明.
2019-2020年高三压轴信息卷数学理
题号
1
2
3
4
5
6
7
8
9
10
11
12
答案
C
D
A
C
A
D
B
B
D
B
C
B
∵
=3
∴-x1=3x2∴
消去x2,得3(x1+x2)2+4x1x2=0,∴3(
)2+4
=0
整理得4k2m2+2m2-k2-2=0 13′
m2=
时,上式不成立;m2≠
时,k2=
,
因λ=3∴k≠0∴k2=
>0,∴-1 或 容易验证k2>2m2-2成立,所以(*)成立.即所求m的取值范围为(-1,- )∪( ,1)∪{0} 22.解: (Ⅰ)时,,,, 又所以切线方程为………6分 (Ⅱ)1°当时,,则 令,, 再令, 当时,∴在上递减, ∴当时,, ∴,所以在上递增,,所以 2°时,,则 由1°知当时,在上递增 当时,, 所以在上递增,∴ ∴; 由1°及2°得: ………12分 2019-2020年高三周末练习(第11周)英语试卷 第一部分: 听力(共两节,满分20分) 该部分分为第一、第二两节。 注意: 回答听力部分时,请将答案标在试卷上。 听力部分结束前,你将有两分钟的时间将试卷上的答案转涂到答题卡上。 第一节(共5小题;每小题1分,满分5分) 听下面5段对话。 每段对话后有一个小题,从题中所给的A、B、C三个选项中选出最佳选项,并标在试卷的相应位置。 听完每段对话后,你都有10秒钟的时间来回答有关小题和阅读下一小题。 每段对话仅读一遍。 1.HowdoesJanefeel? A.Satisfied.B.Happy.C.Depressed. 2.Whyaretherenoroomsavailable? A.Becauseofaconference. B.Becauseofamarathon. C.Becauseofanoutdoormusicfestival. 3.Wheredoestheconversationprobablytakeplace? A.Inahouseagent.B.Onthecampus.C.Inachurch. 4.Whatdoesthewomanmean? A.Shedoesn’tthinkmuchoftheroom. B.Theroomisfixedattheman’srequest. C.Sheagreeswiththeman. 5.WhywasJanenervous? A.Becauseshehadtotypeapaper. B.Becauseshethoughtherpapermightbelate. C.Becauseshewasafraidoffailingtheexam. 第二节(共15小题;每题1分,满分15分) 听下面5段对话或独白。 每段对话或独白后有几个小题,从题中所给的A,B,C三个选项中选出最佳选项,并标在试卷的相应位置。 听每段对话或独白前,你将有时间阅读各个小题,每小题5秒钟;听完后,每小题将给出5秒钟的作答时间。 每段对话或独白读两遍。 听第6段材料,回答第6至8题。 6.What’sBob’sson’shobby? A.Workinginthegarden.B.Collectingcoins.C.Collectingstamps. 7.Wheredoesthewomanwanttogosomeday? A.Japan.B.China.C.Canada. 8.Whydoesn’tBobhavearealhobby? A.Becausehe’stoobusy.B.Becausehe’slazy.C.Becausehe’scrazyaboutwork. 听第7段材料,回答第9至11题。 9.Howmuchisthetrainfare? A.12Yuan.B.20Yuan.C.40Yuan. 10.Whereshouldthemangetonthetrain? A.Onplatformnumber3.B.Onplatformnumber4.C.Onplatformnumber5. 11.Howoftendothetrainsearound? A.Abouteverythirtyminutes. B.Abouteverytwentyminutes. C.Abouteverytenminutes. 听第8段材料,回答第12至14题。 12.Whereisthemanliving? A.Inahotel.B.Inanewapartment.C.Athome. 13.WhenwillthewomanleaveforBerkeley? A.Nextweek.B.Nextmonth.C.Theweekafternext. 14.Whatwillthetwospeakersdoat7: 00p.m.onSaturday? A.Seeamovie.B.Haveadinner.C.Attendaparty. 听第9段材料,回答第15至17题。 15.Whatisprobablythe“Cops”? A.ATVshow.B.Abook.C.Afilm. 16.Whatdoweknowabouttheboyatthefastfoodrestaurant? A.Hesmokedheavily.B.Hehadalotofcandy.C.Hedrankalotofalcohol. 17.Whatarethetwospeakersinmon? A.Theybothsmokecigarettes. B.Theybothdrinkalcohol. C.Theybothhavedrugs. 听第10段材料,回答第18至20题。 18.WhatdoRussianperformersdowhentheyreceivetheapplause? A.Theydon’tclapuntiltheyleavethestage. B.Theyusuallyclaptogetherwiththeirfans. C.Theyusuallyrisefromtheseats. 19.Whydidpeopleclaphandsaverylongtimeago? A.Toshowthattheylikedoragreedtosomething. B.Toexpresstheirgreatadmirationforaperformer. C.Toattempttodrivetheperformersoutofthestage. 20.Whatisthespeakermainlytalkingabout? A.Thedreamofeveryperformer. B.ThehistoryofclappinginRussia. C.Thedifferentmeaningsofclapping. 第二部分: 英语知识运用(共两节,满分35分) 第一节: 单项填空(共15小题,每小题1分,满分15分) 21.Theworkerscouldhardlytheboss’sbadtemperbutunderhissupervisiontheyhadto themselvestoworkingharder. A.tolerate;contributeB.bear;dedicate C.stand;resignD.putupwith;invest 22.Deeplyhisunhappychildhood,theboy’sseemedquiteoddandstrange. A.relatingto;charactersB.associatedwith;personality C.linkedby;virtuesD.connectingto;morality 23.Itisimpossibletoliveinsocietyandindependentofsociety;andthereforeitisdifficultto societyofinequalityaswellascorruption. A.remove;fromB.rid;ofC.substitute;withD.simplify;by 24.Havingbeentrainedforoneandahalfyears,shemanagedtogetaprofessionalqualification afirst–degreenurse. A.consistingwithB.agreedwithC.correspondingtoD.correspondedwith 25.Crusoeisn’tgoodenoughfigure,buthisoutstandingskillpensatesforit. A.inresponsetoB.intermsofC.infavourofD.inhonourof 26.Ifyoucan’twinfromthepublic,thegoldmedalwillmeannothingtoyou. A.gamesB.knowledgeC.recognitionD.notice 27.Makesurethegasisturnedoffafterabath,whichwouldcausedanger. A.somehowB.meanwhileC.otherwiseD.furthermore 28.Herexcellentperformanceinthepetitionprovedthatshewasawinner. A.valueB.worthyC.worthD.worthwhile 29.thesecretofnature,theyyoungscientisthaslittletimeforentertainment. A.Devotedtobetray B.Devotinghimselftobringtolight C.Devotedtounearthing D.Devotingtoexploring 30.Thosesuccessfuldeafdancersthinkthatdancingisanactivitysightmattersmorethanhearing. A.whenB.whoseC.whichD.where 31.___iswell-knowntoallisthatthexxShanghaiWorldExpohasbeenbroughttoanend. A.AsB.ThatC.WhatD.It 32.Sincethenewdirectortookoffice,wehaveworked___hours,-thatistosay,weworkmorefreely. A.flexibleB.pulsoryC.strictD.endless 33.___inaheavytrafficjaminataxiwhileyouarehurryingtotheairportisquiteaunpleasantexperience. A.HavingcaughtB.Beingcaught C.CaughtD.Havingbeingcaught 34.MyfamilyweremovingtothecountrysideandIhadtomakesome___andlearntoleada differentlifethere. A.allowanceB.acmodation C.adjustmentD.assessment 35.TheChinesecaptainwasreleasedbyJapanfinally,___nearlyamonthofdetention(扣押),whichhasseriouslyharmedtherelationshipbetweenthetwocountries. A.endedB.endingC.toendD.beingended 第二节: 完形填空(共20题;每小题1分,满分20分) Itwasawintermorning,justacoupleofweeksbeforeChristmas.Whilemostpeoplewere36_theircars,Trevor,myhusband,hadto_37_earlytoridehisbikefourkilometersawayfromhometowork.Onarrival,he_38__hisbikeoutsidethebackdoorasheusuallydoes.After_39_ 10hoursoflabor,hisreturnedtofindhisbike40. Thebike,ablackKona18speed,wasouronlytool.Trevorusedittogetto41,puttingin60-hourweeksto__42__hisyoungfamily.Andthebikewasalsousedtogetgroceries,43usfromhavingtowalklongdistancesfromwherewelive. Iwasso44_thatsomeonewouldstealourbikethatIwrotetothenewspaperandtoldthemourstory.Shortlyafterthat,severalpeopleinourarea45tohelp.Onewonderfulstranger46boughtabike,thencalledmyhusbandtopickitup.47myhusbandhadawaytogettoandfromhisjob.Itreallyisa(an)48thatapletestrangerwouldgooutoftheirwayforsomeonetheyhavenevermetbefore.Peoplesaythatasmilecanbe49fromonepersontoanother,butactsofkindnessfrom50areevenmoreso.Thisexperiencehashadaspreadingeffectinourlivesbecauseit51ourfaithinhumanityasawhole.Andithas_52ustobemoremindfulofwaysthatwe,too,can53withothers.Nomatterhowbigorhowsmall,anactofkindnessshowsthatsomeone54.Andtheresultscanbe55. 36.A.coolingdownB.warmingupC.speedingupD.slowingdown 37.A.getupB.wakeupC.turnupD.riseup 38.A.piledB.pushedC.parkedD.paused 39.A.puttinginB.puttingonC.puttingoffD.puttingaway 40.A.brokenB.robbedC.hiddenD.gone 41.A.studyB.shopC.workD.deliver 42.A.liveB.supportC.serveD.protect 43.A.gettingB.protectingC.savingD.allowing 44.A.surprisedB.thrilledC.puzzledD.sad 45.A.offeredB.supportedC.providedD.agreed 46.A.stillB.finallyC.evenD.yet 47.A.NowandthenB.OnceinawhileC.OnceagainD.Soonerorlater 48.A.honorB.pityC.sympathyD.respect 49.A.thrownB.passedC.sentD.got 50.A.friendsB.strangersC.relativesD.parents 51.A.weakenedB.spreadC.reducedD.strengthened 52.A.movedB.forcedC.urgedD.influenced 53.A.shareB.connectC.dealD.work 54.A.likesB.caresC.worriesD.wonders 55.A.shortB.promising
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