2018年广东六校联盟第三次联考答案

广东六校2018届高三理综下学期第三次联考试卷（附答案）绝密★启用前2018届高三“六校联盟”第三次联考理科综合注意事项：1．答卷前，考生务必将自己的姓名、考生号、考场号和座位号填写在答题卡上。

用2B铅笔将试卷类型（B）填涂在答题卡相应位置上。

将条形码横贴在答题卡右上角“条形码粘贴处”。

2．作答选择题时，选出每小题答案后，用2B铅笔在答题卡上对应题目选项的答案信息点涂黑；如需要改动，用橡皮擦干净后，再选涂其他答案。

答案不能答在试卷上。

3．非选择题必须用黑色字迹的钢笔或签字笔作答，答案必须写在答题卡各题目指定区域内相应位置上；如需改动，先划掉原来的答案，然后再写上新答案；不准使用铅笔和涂改液。

不按以上要求作答无效。

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考试结束后，将试卷和答题卡一并交回。

可能用到的相对原子质量：H1C12N14O16Cu64Au197第I卷（选择题共126分）一、选择题：本题共13小题，每小题6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.下列有关细胞的结构和功能的叙述，正确的是A.细胞膜中的磷脂分子是由甘油、脂肪酸和磷酸等组成B.人体成熟的红细胞中核孔数目很少，因此红细胞代谢较弱C.组成细胞膜的主要成分是脂质、蛋白质和多糖D.黑暗条件下，植物细胞的细胞质基质中不能合成三磷酸腺苷2.下列与实验相关的叙述，错误的是A.马铃薯块茎捣碎后的提取液可检测出蛋白质B.组织样液中滴加斐林试剂，不产生砖红色沉淀说明没有还原糖C.调查人群中色盲发病率时，若只在患者家系中调查将会导致结果偏大D.在95%乙醇中加入无水Na2CO3后可提高色素的溶解度3.下列关于植物生长素生理作用的叙述，正确的是A.燕麦胚芽鞘中生长素的极性运输与光照方向无关B.顶端优势不能够说明生长素作用具有两重性C.促进芽生长的生长素浓度必然会抑制根的生长D.生长素从胚芽鞘尖端基部进入琼脂块的方式是协助扩散4.下列关于种群、群落和生态系统的叙述，正确的是A.调查植物丰富度不适合用样方法B.一只猛禽追逐另一只同种猛禽，这两只猛禽属于种间竞争C.一棵树上不同高度的喜鹊巢，能反映动物群落的垂直结构D.预测种群数量变化的主要依据是年龄组成5.下列有关生物体内基因重组和基因突变的叙述，正确的是A.由碱基对改变引起的DNA分子结构的改变就是基因突变B.减数分裂过程中，控制一对性状的基因不能发生基因重组C.淀粉分支酶基因中插入了一段外来DNA序列不属于基因突变D.小麦植株在有性生殖时，一对等位基因一定不会发生基因重组6.小麦的高秆（H）对矮秆（h）为显性。

2018高三数学（理）第三次联考试题（广东省六校附答案）
5 c
④得，
∴ ．
又，
∴数列是首项为3，比为的等比数列．
∴ ，
∴ ．
点睛
数列的通项an与前n项和Sn的关系是．在应用此结论解题时要注意若当n＝1时，a1若适合，则n＝1的情况可并入n≥2时的通项an；当n＝1时，a1若不适合，则用分段函数的形式表示．
18 某小店每天以每份5元的价格从食品厂购进若干份食品，然后以每份10元的价格出售如果当天卖不完，剩下的食品还可以每份1元的价格退回食品厂处理
(Ⅰ)若小店一天购进16份，求当天的利润（单位元）关于当天需求量（单位份，）的函数解析式；
(Ⅱ)小店记录了100天这种食品的日需求量（单位份），整理得下表
日需求量 14151617181920
频数10201816151310
以100天记录的各需求量的频率作为各需求量发生的概率
(i)小店一天购进16份这种食品，表示当天的利润（单位元），求的分布列及数学期望；
(ii)以小店当天利润的期望值为决策依据，你认为一天应购进食品16份还是17份？
【答案】(Ⅰ) ；(Ⅱ)(i)答案见解析；(ii)17份
【解析】试题分析。

2018届高三“六校联盟”第三次联考英语试卷共10页，卷面满分120分，折算成135分计入总分。

考试用时120分钟。

第一部分阅读理解（共两节，满分40分）第一节(共15小题；每小题2分，满分30分)阅读下列短文，从短文后每题所给的A、B、C和D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

AQuestioning the existence of aliens is something that scientists have done for decades. In fact, most people do believe that aliens exist in some fashion. The main necessities for life are water and some form of energy source. Not surprisingly, there are some planets, exoplanets and moons that fit the bill. Here are several best chances at finding life in the universe.◆TRAPPIST-1TRAPPIST-1 is a planetary system a few dozen light-years away, whose discovery was announced in early 2017. This system consists of seven Earth-like exoplanets orbiting an "ultra-cool" star, and it is one of our shots at finding possible life beyond our own solar system.◆TitanTitan is the largest moon of Saturn, the sixth planet from our Sun. This moon could potentially harbor life but possibly not in the sense that we think. Titan does not exactly fit the description of being in a typical habitable zone.Titan has water, and it has liquid. It just doesn't have liquid water. The water on this moon is completely solid because of the extremely cold temperature.◆EuropaEuropa is one of Jupiter's moons here in our own solar system. It is another candidate due to its potential to hold liquid water. Europa is thought to have all the necessities for life including water, energy sources, and the right chemical build-up.◆MarsThe Red Planet, the fourth from the Sun, is probably one of the most talked-about potential candidates for extraterrestrial(地球外的) life and even for human colonization. Despite some different voices, finding extraterrestrial life on Mars really is a serious possibility.We know by now that we won't find little green men or any intelligent form of life that we understand. However, there is evidence that there was and may still be microscopic life on the small red planet.1. The common point of these celestial bodies is that _______.A. solid water exists on them respectivelyB. life might exist on each of themC. they all contain liquid waterD. each of them has living things on it2. Which celestial body could have life different from human imagination?A. TRAPPIST-1.B. Titan.C. Europa.D. Mars.3. Which of the following statements is TRUE?A. Europa is the most talked-about potential candidate for extraterrestrial life.B. TRAPPIST-1 is the only body that contains life beyond the solar system.C. All the scientists do believe that aliens exist in some manner.D. There is proof that life existed on the celestial body Mars.BAbout a month after I joined Facebook, I got a call from Lori Goler, a highly regarded senior director of marketing at eBay. She made it clear this was a business call. “I want to apply to work with you at Facebook,” she said. “Instead of recommending myself, I wan t toask you: What is your biggest problem, and how can I solve it?”My jaw hit the floor. I had hired thousands of people over the previous decade and no one had ever said anything remotely like that. People usually focus on finding the right role for th emselves, with the implication that their skills will help the company. Lori put Facebook’s needs front and center. It was a killer approach. I responded, “Recruiting is my biggest problem. And, yes, you can solve it.”Lori never dreamed she would work in recruiting, but she jumped in. She even agreed to trade earnings for acquiring new skills in a new field. Lori did a great job running recruiting and within months was promoted to her current job, leading People@Facebook.The most common metaphor for careers is a ladder, but this concept no longer applies to most workers. As of 2010, the average American had eleven jobs from the ages of eighteen to forty-six alone. Lori often quotes Pattie Sellers, who came up with a much better metaphor: “Careers are a jungle gym, not a ladder.”As Lori describes it, there’s only one way to get to the top of a ladder, but there are many ways to get to the top of a jungle gym. The jungle gym model benefits everyone, but especially women who might be starting careers, switching careers, getting blocked by external barriers, or reentering the workforce after taking time off. The ability to create a unique path with occasional dips, detours (弯路), and even dead ends presents great views of many people, not just those at the top. On a ladder, most climbers are stuck staring at the butt of the person above.4. Why did Lori make the call?A. She helped Facebook to solve the biggest problem.B. She wanted to make a business deal with Facebook.C. She tried to ask for a pay rise in Facebook.D. She wanted to become an employee in Facebook.5. What impressed “I” by Lori?A. Lori was good at running recruiting.B. Lori attached great importance to Facebook’s needs.C. Lori jumped in Facebook with no adequate experience.D. Lori was skilled in marketing at eBay.6. What can we infer from the passage?A. Now all people don’t tend to climb the ladder.B. None on the ladder can enjoy the great views.C. Jungle gyms offer limited exploration for employees.D. A pregnant woman, jobless, benefits little from the jungle gyms.7. What is the best title of the passage?A. It’s a Jungle Gym, Not a Ladder.B. Facebook’s Biggest Problem.C. Applying for a Job in Facebook.D. A Jungle Gym is Better than a Ladder.CCareers in zoology are extremely varied and unique, and can provide incredible learning and work opportunities for anyone devoted to animal studies and welfare. Zoology, or the study of animals, is a wide field with many specialties, including research, conservation, veterinary (兽医的) medicine, and the care of animals. For people with a love of animals and some training, dreams of careers in zoology may come true.Some careers in zoology focus on research and scientific studies. These careers may allow those with a good theoretical science background to develop and run studies that improve human understanding of the animal world. Research in zoology can help create safer and more effective products for animals or can teach humans more about animal behavior in order to aid in conservation, breeding programs, and habitat preservation.Careers in zoology that focus on conservation attach great importance to the continued survival and increased protection of animal species. Conservationists may work with political groups or governments to help make laws to protect and preserve animals, or may work in the field gathering information on potential threats to the health of global ecosystems. Someconservationists work in educational fields, trying to improve human efforts to save animals from extinction.Animals are subject to illness and injury, and some careers in zoology help to create a safe, stable animal population. Veterinary medicine is an important specialty field, and may take several years of intensive training to qualify as a certified veterinarian. While many veterinarians focus on the small-animal practice of domestic pets, vets in rural areas often work with large farm animals and more adventurous veterinarians may work with exotic species in zoos and wildlife preserves. .Humans love to observe animals, and modern-day zoos and wildlife preserves help meet that interest while providing facilities to assist with conservation programs. Zoology careers in zoos can range from overseeing breeding programs, to creating the proper diet for a deer, to cleaning the tiger’s cage. Many volunteer and entry-level jobs are available for people that love animals.8. What is the purpose of researching on animals in zoology?A. To help governments make laws.B. To improve researchers’ scientific knowledge.C. To create safe and effective products for humans.D. To educate people to protect animals.9. What can careers in zoology that focus on veterinary medicine help?A. Better understand animals.B. P rotect animals’ health.C. C lean the animals’ cages.D. Increase the number of animals.10. Which of the following shows the structure of the whole passage?(P1=paragraph 1; P2= paragraph 2; P3= paragraph 3; P4= paragraph 1; P5= paragraph 5;)11. What does the passage mainly present?A. V olunteers’ passion for zoology.B. A new idea of careers in zoology.C. Different types of careers in zoology.D. Effective measures of animal protection.DNEW YORK－A massive winter storm paralyzed much of the US East Coast on Thursday and Friday, dumping as much as 46 centimeters of snow from the Carolinas to Maine. It also caused flooding on the streets of Boston due to swelling storm tides, forced the cancellation of nearly 5,000 flights and closed businesses, offices and schools.Some meteorologists (气象学家) classified the storm as a "bomb cyclone" for its sharp drop in atmospheric pressure would be followed immediately by a blast of cold air that could break records in more than two dozen cities and bring wind chills as low as -40℃during the weekend.From Baltimore, Maryland, to Caribou in Maine, efforts were underway to clear roadways of ice and snow as wind chill temperatures were to plunge during the day, reaching -40℃in some parts after sundown, according to the National Weather Service.Utility companies across the East worked to repair downed power lines early on Friday as about 21,000 customers remained without electricity, down from almost 80,000 the day before, and issued warnings that temperatures may become dangerously low."If the temperature in your home begins to fall, we recommend taking shelter elsewhere until service can be restored. You can find warming centers by contacting local authorities," National Grid power company, which serves Massachusetts, said on Twitter.Airlines canceled 4,000 flights on Thursday and hundreds more on Friday, according to, an online tracking service.Mayor Bill de Blasio said it could feel like -30℃on Friday and Saturday nights with the wind chill. "This is a serious, serious storm, and may be the most severe in 2018," he said at a news conference.New York Governor Andrew Cuomo declared a state of emergency for the southern part of the state, while New Jersey Governor Chris Christie declared a state of emergency for several counties.12.Which of the following is NOT the consequence of the massive winter storm?A.Breakdown of the US coastB.Flooding in Boston.C.Cancellation of nearly 5,000 flights.D.Closure in business, offices, and schools.13.Why did some meteorologists classify this winter storm as “bomb cyclone”?A.Because it will cause changeable atmospheric pressure.B.Because the scale of this storm could break records in lots of cities.C.Because of the deadly and destructive effects of this storm.D.Because of the extremely cold air and the wind chills in this storm.14.Which of the following best explains the underlined word “plunge” in P3?A. decline steadilyB. drop dramaticallyC. fluctuate violentlyD. fall moderately15.About the rescue work, which of the following statements is INCORRECT?A.People were making great efforts to rid roadways of ice and snow.B.About 101 thousand people were left without electricity on Thursday.C.Residents can stay in warming centers until heating service is restored.D.Aviation service hasn't been brought back to normal yet until Friday.第二节(共5小题；每小题2分，满分10分)根据短文内容，从短文后的选项中选出能填入空白处的最佳选项, 并在答题卡上将该项涂黑。

广东六校2018届高三英语下学期第三次联考试题（附答案）2018届高三“六校联盟”第三次联考英语命题学校：珠海一中2018年2月试卷共10页，卷面满分120分，折算成135分计入总分。

考试用时120分钟。

注意事项：1.答题前，先将自己的班级、姓名、试室号、座位号和考号填写在答题卡上。

2.选择题的作答：每小题选出答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑。

写在试题卷、草稿纸和答题卡的非答题区域均无效。

3.非选择题的作答：用黑色签字笔直接答在答题卡上对应的答题区域内。

写在试题卷、草稿纸和答题卡的非答题区域均无效。

4.考试结束后，请将答题卡上交。

第一部分阅读理解（共两节，满分40分）第一节(共15小题；每小题2分，满分30分)阅读下列短文，从短文后每题所给的A、B、C和D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

A Questioningtheexistenceofaliensissomethingthatsci entistshavedonefordecaledobelievethataliensexisti nsomefashiesforlifearewaterandsomeformofenergysou ,therearesomeplanets,exoplanetsandmoonsthatfitthe bestchancesatfindinglifeintheuniveAPPIST-1isaplan etarysystemafewdozenlight-yearsaway,whosediscover ywasannouncedinearly2017.Thissystemconsistsofseve nEarth-likeexoplanetsorbitingan"ultra-cool"star,a nditisoneofourshotsatfindingpossiblelifebeyondour ownsolarsysthelargestmoonofSaturn,thesixthplanetf romourtentiallyharborlifebutpossiblynotinthesense thatwethctlyfitthedescriptionofbeinginatypicalhab itablezandithasliqveliquidwaoonispletelysolidbeca useoftheextremelycoldtemperatisoneofJupiter'smoon shereinourownsolarsysidateduetoitspotentialtohold liquidwatohaveallthenecessitiesforlifeincludingwa ter,energysources,andtherightchemicalbuild-up. ◆MarsTheRedPlanet,thefourthfromtheSun,isprobablyoneoft hemosttalked-aboutpotentialcandidatesforextraterrestrial(地球外的)lifeandevenforhumancolonizaterentvoices,findin gextraterrestriallifeonMarsreallyisaseriouspossib iltwewon'tfindlittlegreenmenoranyintelligentformo flifethatweunderstevidencethattherewasandmaystill bemicroscopiclifeonthesmallredplantofthesecelesti albodiesisthat____istsonthemrespectivelyB.lifemightexistoneachofthemC.theyallcontainliquidwaterD.eachofthemhaslivingthingsonit2.Whichcelestialbodycouldhavelifedifferentfromhum animagination?A.TRAPPIST-1.B.Ti.3.WhichofthefollowingstatementsisTRUE?A.Europaisthemosttalked-aboutpotentialcandidatefo rextraterrestrialltheonlybodythatcontainslifebeyo ndthesolarsysistsdobelievethataliensexistinsomema nthatlifeexistedonthecelestialbodyMfterIjoinedFac ebook,IgotacallfromLoriGoler,ahighlyregardedsenio rdirectorofmarketingatehiswasabusinesscworkwithyo uatFacebook,”shesmendingmyself,Iwanttoaskyou:Wha tisyourbiggestproblem,andhowcanI solveit?”Myjawhittheflndsofpeopleoverthepreviousdecadeandn oonehadeversaidanythingremotelyliketcusonfindingt herightroleforthemselves,withtheimplicationthatth eirskillswillhelpthep’sneedsfrontandcenroruiting ismybiggestprobolvmedshewouldworkinrecruiting,but shejumpetradeearningsforacquiringnewskillsinanewf ibrunningrecruitingandwithinmonthswaspromotedtohe rcurrentjob,leadingPeople@Facebetaphorforcareersi saladder,butthisconceptnolongerappliestomostworkr ageAmericanhadelevenjobsfromtheagesofeighteentofo rty-sixalPattieSellers,whocameupwithamuchbetterme taphor:“Careersareajunglegym,notaladesit,there’sonlyonewaytogettothetopofaladder,buttherearemany waystogettothetopofajungleelbenefitseveryone,bute speciallywomenwhomightbestartingcareers,switching careers,gettingblockedbyexternalbarriers,orreente ringtheworkforceaftertakingtimeateauniquepathwith occasionaldips,detours(弯路),andevendeadendspresentsgreatviewsofmanypeople ,notjustthoseatthelimbersarestuckstaringatthebutt ofthepersonabkethecall?A.ShehelpedFacebooktosolvethebiggestprobakeabusinessdealwithFacebkforapayriseinFacebeeanemployeein Facebd“I”byLori?A.LoriwasgoodatrunningrecruitgreatimportancetoFac ebook’sneFacebookwithnoadequateexperieedinmarket ingateerfromthepassage?A.Nowallpeopledon’ttendtoclimbtheladdercanenjoyt hegreatviferlimitedexplorationforemployan,jobless ,benefitslittlefromthejunglegttitleofthepassage?A.It’saJungleGym,NotaLadggestProbJobinFacebBette rthanaLadlogyareextremelyvariedandunique,andcanpr ovideincrediblelearningandworkopportunitiesforany onedevotedtoanimalstudiesandwelfudyofanimals,isaw idefieldwithmanyspecialties,includingresearch,con servation,veterinary(兽医的)medicine,andthecareofanimoveofanimalsandsometr aining,dreamsofcareersinzoologymayetoologyfocuson researchandscientificstudallowthosewithagoodtheor eticalsciencebackgroundtodevelopandrunstudiesthat improvehumanunderstandingoftheanimalwogycanhelpcr eatesaferandmoreeffectiveproductsforanimalsorcant eachhumansmoreaboutanimalbehaviorinordertoaidinco nservation,breedingprograms,andhabitatpreservatgythatfocusonconservationattachgreatimportancetothe continuedsurvivalandincreasedprotectionofanimalsp ecsmayworkwithpoliticalgroupsorgovernmentstohelpm akelawstoprotectandpreserveanimals,ormayworkinthe fieldgatheringinformationonpotentialthreatstotheh ealthofglobalecosystnistsworkineducationalfields, tryingtoimprovehumaneffortstosaveanimalsfromextin ctecttoillnessandinjury,andsomecareersinzoologyhe lptocreateasafe,stableanimalpopulatineisanimporta ntspecialtyfield,andmaytakeseveralyearsofintensiv etrainingtoqualifyasacertifiedveterinarnariansfoc usonthesmall-animalpracticeofdomesticpets,vetsinr uralareasoftenworkwithlargefarmanimalsandmoreadve nturousveterinariansmayworkwithexoticspeciesinzoo sandwildlifepreserbserveanimals,andmodern-dayzoos andwildlifepreserveshelpmeetthatinterestwhileprov idingfacilitiestoassistwithconservationprogrnzoos canrangefromoverseeingbreedingprograms,tocreating theproperdietforadeer,tocleaningthetiger’scdentr y-leveljobsareavailableforpeoplethatloveanimposeo fresearchingonanimalsinzoology?A.Tohelpgovernmentsmakelearchers’sci entificknowleandeffectiveproductsforhumpletoprotectanimrsinzo ologythatfocusonveterinarymedicinehelp?A.Betterunderstandanims’heaals’camberofanimollo wingshowsthestructureofthewholepassage?(P1=paragraph1;P2=paragraph2;P3=paragraph3;P4=par agraph1;P5=paragraph5;)11.Whatdoesthepassagemainlypresent?A.Volunteers’passionforzoolreersinzoolesofcareer sinzoolsuresofanimalprotectsivewinterstormparalyz edmuchoftheUSEastCoastonThursdayandFriday,dumping asmuchas46centimetersofsnowfromtheCarolinastoMaod ingonthestreetsofBostonduetoswellingstormtides,fo rcedthecancellationofnearly5,000flightsandclosedb usinesses,officesandschoists(气象学家)classifiedthestormasa"bombcyclone"foritssharpd ropinatmosphericpressurewouldbefollowedimmediatel ybyablastofcoldairthatcouldbreakrecordsinmorethan twodozencitiesandbringwindchillsaslowas-40℃durin gtheweekMaryland,toCaribouinMaine,effortswereunde rwaytoclearroadwaysoficeandsnowaswindchilltempera turesweretoplungeduringtheday,reaching-40℃insome partsaftersundown,accordingtotheNationalWeatherServesacrosstheEastworkedtorepairdownedpowerlinesea rlyonFridayasabout21,000customersremainedwithoute lectricity,downfromalmost80,000thedaybefore,andis suedwarningsthattemperaturesmaybeedangerouslyurei nyourhomebeginstofall,weremendtakingshelterelsewh ereuntilservicecanberestongcentersbycontactingloc alauthorities,"NationalGridpowerpany,whichservesM assachusetts,saidonTwited4,000flightsonThursdayan dhundredsmoreonFriday,accordingtoFlightAwckingser vsiosaiditcouldfeellike-30℃onFridayandSaturdayni ghtswiththewindch,seriousstorm,andmaybethemostsev erein2018,"hesaidatanewsconfererAndrewCuomodeclar edastateofemergencyforthesouthernpartofthestate,w hileNewJerseyGovernorChrisChristiedeclaredastateo femergencyforseveralcountollowingisNOTtheconseque nceofthemassivewinterstorm?A.BreakdownoftheUScoastB.FloodinginBosofnearly5,000fliginess,offices,and schoeteorologistsclassifythiswinterstormas“bombc yclone”?A.Becauseitwillcausechangeableatmosphericpressale ofthisstormcouldbreakrecordsinlotsofcitdeadlyanddestructiveeffectsofthisstextremelycoldairandthewi ndchillsinthisstollowingbestexplainstheunderlined word“plunge”inP3?A.declinesteadiyC.fluctuateviolent15.Abouttherescuework,whichofth efollowingstatementsisINCORRECT?A.Peopleweremakinggreateffortstoridroadwaysoficea ndssandpeoplewereleftwithoutelectricityonThurssta yinwarmingcentersuntilheatingserviceisrestoicehas n'tbeenbroughtbacktonormalyetuntilFriday.第二节(共5小题；每小题2分，满分10分)根据短文内容，从短文后的选项中选出能填入空白处的最佳选项,并在答题卡上将该项涂黑。

2018届广东省六校高三第三次联考理科综合化学试题一、单项选择题7．下列说法正确的是A．石油的分馏和煤的气化都是发生了化学变化B．纤维素、油脂和蛋白质在一定条件下都能水解C．二氧化硅是半导体材料，可将太阳能直接转化为电能D．乙烯和苯都能使酸性KMnO溶液褪色48．下列离子在溶液中能大量共存的一组是A．K＋、H＋、ClO－、SO32－ B．Fe3＋、Mg2＋、NO3－、CO32－C．Na＋、Ca2＋、HCO3－、OH－ D．Al3＋、NH4＋、Cl－、SO42－9．设n A表示阿伏加德罗常数的数值。

下列说法正确的是A．标准状况下，11.2L CHCl3含有0.5 n A个CHCl3分子B．常温常压下，16 g O3含有8n A个电子C．1L 0.1 mol/L醋酸溶液中含有0.1n A个氢离子D．27g铝片投入足量浓HNO3中生成n A个NO分子10．下列有关物质性质的描述和该性质的应用均正确的是A．氨气具有氧化性，用浓氨水检验氯气管道是否泄漏B．铜的金属活泼性比铁的弱，可在铁闸上装若干铜块以减缓其腐蚀C．二氧化硫具有还原性，用二氧化硫水溶液吸收溴蒸气D．二氧化锰具有较强的的氧化性，可作H2O2分解的氧化剂11．下列有关说法正确的是A．AlCl3溶液蒸干、灼烧至恒重，最终剩余固体是AlCl3 B．向煮沸的1 mol·L－1 NaOH溶液中滴加FeCl3饱和溶液可制备Fe(OH)3胶体C．等体积pH＝12的氨水和pH＝12的NaOH溶液可中和含等物质的量HCl的盐酸D．锅炉中沉积的CaSO4可用饱和Na2CO3溶液浸泡，再将不溶物用酸去除12．50℃时，0.1mol·L－1Na2CO3溶液pH＝12，下列判断正确的是A．c(OH－)＝10－2mol·L－1B．加入少量NaOH固体，c(Na＋)和c(CO32－)均增大C．c(Na＋)＋c(H＋)＝c(HCO3－)＋c(OH－)＋c(CO32－)D．2c(Na＋)＝c(HCO3－)＋c(CO32－)＋c(H2CO3)二、双项选择题22．短周期主族元素X、Y、Z、W的原子序数依次增大，原子半径r(W)＞r(Y)＞r(Z)＞r(X)。

广东六校联盟2018 届高三第三次联考命题：广州市第二中学 2018.02一、现代文阅读（35分）（一）论述类文本阅读（本题共3小题，9分）阅读下面的文字，完成1～3题。

人们的生活处于不停的变动之中，文化也随之而不断变化和发展。

不同文化的交流与碰撞带来文化的融合与冲突，历史学家汤因比发现这是人类文明兴衰的一个重要机制。

这一过程的结果是，文化自信随着社会生活的变迁而变化。

在生产力发展的驱动下，现代资本主义生产方式深刻改变了西方世界的经济社会结构，进而引发了文化的剧烈变革。

资本主义国家由于不断扩大市场的内在需求而推动了全球化进程，带来不同文化之间的激烈碰撞。

马克思、恩格斯观察到：“资产阶级，由于一切生产工具的迅速改进，由于交通的极其便利，把一切民族甚至最野蛮的民族都卷到文明中来了。

它的商品的低廉价格，是它用来摧毁一切万里长城、征服野蛮人最顽强的仇外心理的重炮。

它迫使一切民族在自己那里推行所谓的文明，即变成资产者。

”这种社会生产方式的变革推动了世界各国的文化震荡，引发了普遍的文化危机，人们在新的世界格局下重建自己的文化自信成为普遍问题。

文化认同危机冲击、瓦解了传统的文化自信，引发了人们对既有文化的反省性认识，在文化批判中形成了文化自信的发展机制。

一方面，作为社会意识的文化弥散于人们的日常生活和社会心理中，具有天然的传承性和保守性，由此也形成了走向僵化的可能性。

另一方面，文化也具有一种自我发展的潜能，作为一种能动的因素，它通过新思想的引入而吹响变革的号角，从而成为克服僵化机制进而维系社会系统活力的积极力量。

文化批判意味着以批判性的立场认识和对待自己，不是盲目地肯定或否定，而是在理性地反思与省察之上客观地予以认识和对待，它的对立面不是对象本身而是拒绝理性的思想方法，克服这种思想方法正是启蒙理性的要求。

康德将启蒙理解为脱离人加之于自己的“不成熟状态”。

所以，批判精神乃是实现精神成长的真实表现。

对于一个民族而言，这意味着文化的成熟，表现出该文化的理性自觉和现代意蕴。

广东六校联盟2018届高三第三次联考语文参考答案与评分标准一、现代文阅读（35分）（一）论述类文本阅读（本题共3小题，9分）1．B [A项，“文化自信的生成与发展决定文化的融合与冲突”错误，从原文看，应是“文化的融合与冲突决定文化自信的生成与发展”。

C项“凭借武力优势”错误，原文中“商品的低廉价格，是……重炮”只是比喻的说法。

D项“因否定而获得新生”错误，原文中已强调“文化批判……不是盲目地肯定或否定”。

]2．B [主体部分不是并列式的论证结构。

]3．C [“创造出全新的文化”错误，因为文化“具有天然的传承性和保守性”。

]（二）文学类文本阅读（本题共3小题，14分）4．D [“为了强调故乡胡辣汤味道的正宗细品胡辣汤”错误。

作者细品胡辣汤不仅是为了弥补早年无钱品尝的遗憾，更是为了“品尝”往事和乡情。

]5．（5分）（1）描写精炼传神。

运用神态（细节）描写（“豹眼”“傻”“呆呆地”）、语言描写（“嘣一句重重的陕西话：‘美!’”），生动形象地刻画了老陕们吃饭时的“旁若无人、汪洋恣肆”。

（2）前后照应。

既呼应了上文老陕们“三碗下肚”的满足感，又表现了下文老陕们吃饭时的“原始”和“野性”。

[答对一点3分，两点5分。

意思对即可。

]6．（6分）（1）不同意。

①倒数第二段结合自己的经历，再次从群体的角度写客居台北的陕西乡党对故乡饭食的留恋，拓宽了作品的选材范围，让“舌苔上的记忆”更具有普遍意义。

②倒数第二段写台北的陕西乡党津津有味地吃“名实相去甚远”的“陕西饭食”，突出了味觉记忆的“深刻”和“顽固”，使“舌苔上的记忆”内涵更为深刻，增强了文章的感染力。

③最后一段卒章显志，以“舌苔上的记忆，是渗入血肉和生命同在的东西。

那根，深深扎在故乡情思的厚土里!”作结，升华了文章的主旨。

（2）同意。

（略）[表明态度1分；分析5分，答对一点3分，两点5分，①②两点可任答一点，第③点必答。

意思对即可。

如答“同意”，言之成理可酌情给分。

2018届高三“六校联盟”第三次联考英语命题学校：珠海一中试卷共10页，卷面满分120分，折算成135分计入总分。

考试用时120分钟。

注意事项：1.答题前，先将自己的班级、姓名、试室号、座位号和考号填写在答题卡上。

2.选择题的作答：每小题选出答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑。

写在试题卷、草稿纸和答题卡的非答题区域均无效。

3.非选择题的作答：用黑色签字笔直接答在答题卡上对应的答题区域内。

写在试题卷、草稿纸和答题卡的非答题区域均无效。

4.考试结束后，请将答题卡上交。

第一部分阅读理解（共两节，满分40分）第一节 (共15小题；每小题2分，满分30分)阅读下列短文，从短文后每题所给的A、B、C和D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

AQuestioning the existence of aliens is something that scientists have done for decades. In fact, most people do believe that aliens exist in some fashion. The main necessities for life are water and some form of energy source. Not surprisingly, there are some planets, exoplanets and moons that fit the bill. Here are several best chances at finding life in the universe.◆TRAPPIST-1TRAPPIST-1 is a planetary system a few dozen light-years away, whose discovery was announced in early 2017. This system consists of seven Earth-like exoplanets orbiting an "ultra-cool" star, and it is one of our shots at finding possible life beyond our own solar system.◆TitanTitan is the largest moon of Saturn, the sixth planet from our Sun. This moon could potentially harbor life but possibly not in the sense that we think. Titan does not exactly fit the description of being in a typical habitable zone.Titan has water, and it has liquid. It just doesn't have liquid water. The water on this moon is completely solid because of the extremely cold temperature.◆EuropaEuropa is one of Jupiter's moons here in our own solar system. It is another candidate due to its potential to hold liquid water. Europa is thought to have all the necessities for life including water, energy sources, and the right chemical build-up.◆MarsThe Red Planet, the fourth from the Sun, is probably one of the most talked-about potential candidates for extraterrestrial(地球外的) life and even for human colonization. Despite some different voices, finding extraterrestrial life on Mars really is a serious possibility.We know by now that we won't find little green men or any intelligent form of life thatwe understand. However, there is evidence that there was and may still be microscopic life on the small red planet.1. The common point of these celestial bodies is that _______.A. solid water exists on them respectivelyB. life might exist on each of themC. they all contain liquid waterD. each of them has living things on it2. Which celestialbody could have life different from human imagination?A. TRAPPIST-1.B. Titan.C. Europa.D. Mars.3. Which of the following statements is TRUE?A. Europa is the most talked-about potential candidate for extraterrestrial life.B. TRAPPIST-1 is the only body that contains life beyond the solar system.C. All the scientists do believe that aliens exist in some manner.D. There is proof that life existed on the celestial body Mars.BAbout a month after I joined Facebook, I got a call from Lori Goler, a highly regardedsenior director of marketing at eBay. She made it clear this was a business call. “I want toapply to work with you at Facebook,” she said. “Instead of recommending myself, I wan ask you: What is your biggest problem, and how can I solve it?”My jaw hit the floor. I had hired thousands of people over the previous decade and no onehad ever said anything remotely like that. People usually focus on finding the right role for themselves, with the implication that their skills will help the company. Lori put Facebookneeds front and center. It was a killer approach. I responded, “Recruiting i s my biggest problem. And, yes, you can solve it.”Lori never dreamed she would work in recruiting, but she jumped in. She even agreed totrade earnings for acquiring new skills in a new field. Lori did a great job running recruitingand within months was promoted to her current job, leading People@Facebook.The most common metaphor for careers is a ladder, but this concept no longer applies tomost workers. As of 2010, the average American had eleven jobs from the ages of eighteen toforty-six alone. Lori often quotes Pattie Sellers, who came up with a much better metaphor: “Careers are a jungle gym, not a ladder.”As Lori describes it, there’s only one way to get to the top of a ladder, but there are man ways to get to the top of a jungle gym. The jungle gym model benefits everyone, but especially women who might be starting careers, switching careers, getting blocked byexternal barriers, or reentering the workforce after taking time off. The ability to create aunique path with occasional dips, detours (弯路), and even dead ends presents great views ofmany people, not just those at the top. On a ladder, most climbers are stuck staring at the buttof the person above.4. Why did Lori make the call?A.She helped Facebook to solve the biggest problem.B.She wanted to make a business deal with Facebook.C.She tried to ask for a pay rise in Facebook.D.She wanted to become an employee in Facebook.5.What impressed “I” by Lori?A.Lori was good at running recruiting.。

2018届高三“六校联盟”第三次联考英语命题学校：珠海一中2018年2月试卷共10页，卷面满分120分，折算成135分计入总分。

考试用时120分钟。

注意事项：1.答题前，先将自己的班级、姓名、试室号、座位号和考号填写在答题卡上。

2.选择题的作答：每小题选出答案后，用2B铅笔把答题卡上对应题目的答案标号涂黑。

写在试题卷、草稿纸和答题卡的非答题区域均无效。

3.非选择题的作答：用黑色签字笔直接答在答题卡上对应的答题区域内。

写在试题卷、草稿纸和答题卡的非答题区域均无效。

4.考试结束后，请将答题卡上交。

第一部分阅读理解（共两节，满分40分）第一节(共15小题；每小题2分，满分30分)阅读下列短文，从短文后每题所给的A、B、C和D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。

AQuestioning the existence of aliens is something that scientists have done for decades. In fact, most people do believe that aliens exist in some fashion. The main necessities for life are water and some form of energy source. Not surprisingly, there are some planets, exoplanets and moons that fit the bill. Here are several best chances at finding life in the universe.◆TRAPPIST-1TRAPPIST-1 is a planetary system a few dozen light-years away, whose discovery was announced in early 2017. This system consists of seven Earth-like exoplanets orbiting an "ultra-cool" star, and it is one of our shots at finding possible life beyond our own solar system.◆TitanTitan is the largest moon of Saturn, the sixth planet from our Sun. This moon could potentially harbor life but possibly not in the sense that we think. Titan does not exactly fit the description of being in a typical habitable zone.Titan has water, and it has liquid. It just doesn't have liquid water. The water on this moon is completely solid because of the extremely cold temperature.◆EuropaEuropa is one of Jupiter's moons here in our own solar system. It is another candidate due to its potential to hold liquid water. Europa is thought to have all the necessities for life including water, energy sources, and the right chemical build-up.◆MarsThe Red Planet, the fourth from the Sun, is probably one of the most talked-about potential candidates for extraterrestrial(地球外的) life and even for human colonization. Despite some different voices, finding extraterrestrial life on Mars really is a serious possibility.We know by now that we won't find little green men or any intelligent form of life that we understand. However, there is evidence that there was and may still be microscopic life on the small red planet.1. The common point of these celestial bodies is that _______.A. solid water exists on them respectivelyB. life might exist on each of themC. they all contain liquid waterD. each of them has living things on it2. Which celestial body could have life different from human imagination?A. TRAPPIST-1.B. Titan.C. Europa.D. Mars.3. Which of the following statements is TRUE?A. Europa is the most talked-about potential candidate for extraterrestrial life.B. TRAPPIST-1 is the only body that contains life beyond the solar system.C. All the scientists do believe that aliens exist in some manner.D. There is proof that life existed on the celestial body Mars.BAbout a month after I joined Facebook, I got a call from Lori Goler, a highly regarded senior director of marketing at eBay. She made it clear this was a business call. “I want to apply to work with you at Facebook,” she said. “Instead of recommending myself, I want to ask you: What is your biggest problem, and how can I solve it?”My jaw hit the floor. I had hired thousands of people over the previous decade and no one had ever said anything remotely like that. People usually focus on finding the right role for themselves, with the implication that their skills will help the company. Lori put Facebook’s needs front and center. It was a killer approach. I responded, “Recruiting is my biggest problem. And, yes, you can solve it.”Lori never dreamed she would work in recruiting, but she jumped in. She even agreed to trade earnings for acquiring new skills in a new field. Lori did a great job running recruiting and within months was promoted to her current job, leading People@Facebook.The most common metaphor for careers is a ladder, but this concept no longer applies to most workers. As of 2010, the average American had eleven jobs from the ages of eighteen to forty-six alone. Lori often quotes Pattie Sellers, who came up with a much better metaphor: “Careers are a jungle gym, not a ladder.”As Lori describes it, there’s only one way to get to the top of a ladder, but there are many ways to get to the top of a jungle gym. The jungle gym model benefits everyone, but especially women who might be starting careers, switching careers, getting blocked by external barriers, or reentering the workforce after taking time off. The ability to create a unique path with occasional dips, detours (弯路), and even dead ends presents great views of many people, not just those at the top. On a ladder, most climbers are stuck staring at the butt of the person above.4. Why did Lori make the call?A. She helped Facebook to solve the biggest problem.B. She wanted to make a business deal with Facebook.C. She tried to ask for a pay rise in Facebook.D. She wanted to become an employee in Facebook.5. What impressed “I” by Lori?A. Lori was good at running recruiting.B. Lori at tached great importance to Facebook’s needs.C. Lori jumped in Facebook with no adequate experience.D. Lori was skilled in marketing at eBay.6. What can we infer from the passage?A. Now all people don’t tend to climb the ladder.B. None on the ladder can enjoy the great views.C. Jungle gyms offer limited exploration for employees.D. A pregnant woman, jobless, benefits little from the jungle gyms.7. What is the best title of the passage?A. It’s a Jungle Gym, Not a Ladder.B. Facebook’s Biggest Problem.C. Applying for a Job in Facebook.D. A Jungle Gym is Better than a Ladder.CCareers in zoology are extremely varied and unique, and can provide incredible learning and work opportunities for anyone devoted to animal studies and welfare. Zoology, or the study of animals, is a wide field with many specialties, including research, conservation, veterinary (兽医的) medicine, and the care of animals. For people with a love of animals and some training, dreams of careers in zoology may come true.Some careers in zoology focus on research and scientific studies. These careers may allow those with a good theoretical science background to develop and run studies that improve human understanding of the animal world. Research in zoology can help create safer and more effective products for animals or can teach humans more about animal behavior in order to aid in conservation, breeding programs, and habitat preservation.Careers in zoology that focus on conservation attach great importance to the continued survival and increased protection of animal species. Conservationists may work with political groups or governments to help make laws to protect and preserveanimals, or may work in the field gathering information on potential threats to the health of global ecosystems. Some conservationists work in educational fields, trying to improve human efforts to save animals from extinction.Animals are subject to illness and injury, and some careers in zoology help to create a safe, stable animal population. Veterinary medicine is an important specialty field, and may take several years of intensive training to qualify as a certified veterinarian. While many veterinarians focus on the small-animal practice of domestic pets, vets in rural areas often work with large farm animals and more adventurous veterinarians may work with exotic species in zoos and wildlife preserves. .Humans love to observe animals, and modern-day zoos and wildlife preserves help meet that interest while providing facilities to assist with conservation programs. Zoology careers in zoos can range from overseeing breeding programs, to creating the proper diet for a deer, to cleaning the tiger’s cage. Many volunteer and entry-level jobs are available for people that love animals.8. What is the purpose of researching on animals in zoology?A. To help governments make laws.B. To improve researchers’ scientific knowledge.C. To create safe and effective products for humans.D. To educate people to protect animals.9. What can careers in zoology that focus on veterinary medicine help?A. Better understand animals.B. P rotect animals’ health.C. C lean the animals’ cages.D. Increase the number of animals.10. Which of the following shows the structure of the whole passage?(P1=paragraph 1; P2= paragraph 2; P3= paragraph 3; P4= paragraph 1; P5= paragraph 5)11. What does the passage mainly present?A. Volunteers’ passion for zoology.B. A new idea of careers in zoology.C. Different types of careers in zoology.D. Effective measures of animal protection.DNEW YORK－A massive winter storm paralyzed much of the US East Coast on Thursday and Friday, dumping as much as 46 centimeters of snow from the Carolinas to Maine. It also caused flooding on the streets of Boston due to swelling storm tides, forced the cancellation of nearly 5,000 flights and closed businesses, offices and schools.Some meteorologists (气象学家) classified the storm as a "bomb cyclone" for its sharp drop in atmospheric pressure would be followed immediately by a blast of cold air that could break records in more than two dozen cities and bring wind chills as low as -40℃ during the weekend.From Baltimore, Maryland, to Caribou in Maine, efforts were underway to clear roadways of ice and snow as wind chill temperatures were to plunge during the day, reaching -40℃ in some parts after sundown, according to the National Weather Service.Utility companies across the East worked to repair downed power lines early on Friday as about 21,000 customers remained without electricity, down from almost 80,000 the day before, and issued warnings that temperatures may become dangerously low."If the temperature in your home begins to fall, we recommend taking shelter elsewhere until service can be restored. You can find warming centers by contacting local authorities," National Grid power company, which serves Massachusetts, said on Twitter.Airlines canceled 4,000 flights on Thursday and hundreds more on Friday, according to , an online tracking service.Mayor Bill de Blasio said it could feel like -30℃ on Friday and Saturday nights with the wind chill. "This is a serious, serious storm, and may be the most severe in 2018," he said at a news conference.New York Governor Andrew Cuomo declared a state of emergency for the southern part of the state, while New Jersey Governor Chris Christie declared a state of emergency for several counties.12.Which of the following is NOT the consequence of the massive winter storm?A.Breakdown of the US coastB.Flooding in Boston.C.Cancellation of nearly 5,000 flights.D.Closure in business, offices, and schools.13.Why did some meteorologists classify this winter storm as “bomb cyclone”?A.Because it will cause changeable atmospheric pressure.B.Because the scale of this storm could break records in lots of cities.C.Because of the deadly and destructive effects of this storm.D.Because of the extremely cold air and the wind chills in this storm.14.Which of the following best explains the underlined word “plunge” in P3?A. decline steadilyB. drop dramaticallyC. fluctuate violentlyD. fall moderately15.About the rescue work, which of the following statements is INCORRECT?A.People were making great efforts to rid roadways of ice and snow.B.About 101 thousand people were left without electricity on Thursday.C.Residents can stay in warming centers until heating service is restored.D.Aviation service hasn't been brought back to normal yet until Friday.第二节(共5小题；每小题2分，满分10分)根据短文内容，从短文后的选项中选出能填入空白处的最佳选项, 并在答题卡上将该项涂黑。

2018 届广东省六校第三次联考理科数学第Ⅰ卷（共60 分）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. 已知集合 M {( x, y) | x, y 为实数，且x2 y2 2} ，N {( x, y) | x, y为实数，且 x y 2} ，则 M N 的元素个数为( )A． 0 B ． 1 C．2 D．32. 设等差数列a n的前n 项和为S n，若S3 9，S5 30 ,则 a7 a8 a9 ( )A． 63 B ． 45 C ． 36 D ． 27y 03. 若变量 x, y 满足约束条件x 2 y 1 0 ，则 z 3x 5 y 的取值范围是( )x 4 y 3 0A．3， B ．8,3 C ．,9 D．8,94.1 ln | x |) 函数ysin x 的部分图象大致为(1 ln | x |A．B．C.D．5. 设函数f x cos 3x，其中常数满足0 .若函数 g(x) f ( x) f ' (x)（其中 f ' ( x) 是函数 f (x) 的导数）是偶函数，则等于()1A． B ．5D2C. ．3 6 6 36. 执行下面的程序框图，如果输入的a, b, k 分别为1，2，3，输出的M 15, 那么，判断框中8应填入的条件为 ( )A．n k B ． n k C. n k 1 D ． n k 17. 已知nb0 20 b1 2 i b2 22b n 2n1 i i i i （n 2,i 为虚数单位），又数列a n满足：当 n 1 2 ；当 n 2 an2 21为b2 2i的虚部，若数列时，a ，a n 的前 n 项和为S n，则S2018 ( )A． 2017 B ． 2018 C. 4035 D ． 40332018 2017 2018 20178. 如图，在同一个平面内，三个单位向量OA, OB, OC 满足条件： OA 与 OC 的夹角为，且tan7 ， OB 与 OC 与的夹角为45°. 若OC mOA nOB m,n R ，则 m n 的值为( )32C. 3 2 D．2A．3B．2229. 四面体SABC 中，三组对棱的长分别相等，依次为5，4， x ，则x 的取值范围是() A ．2，41B ． 3，9C.3， 41D ． 2，910. 从 2 个不同的红球、 2 个不同的黄球、 2 个不同的篮球共六个球中任取2 个，放入红、 黄、 蓝色的三个袋子中，每个袋子至多放入一个球， 且球色与袋色不同， 那么不同的放法有( ) A ．42 种B ．36 种C.72种D ．46 种 11. 已知点 F 为双曲线 E :x 2y 2 1 a, b 0 的右焦点，直线 y kx(k 0)与 E 交于 M,Na 2b 2两点，若 MFNF ,设MNF, 且12 ， ，则该双曲线的离心率的取值范围是6( )A ． 2,26B．2,31C.2, 2 6D．2,3112. 已知 A x 1, y 1 、 B x 2 , y 2 是函数 f xln x与 k图象的两个不同的交点，则xg xx 2f x 1 x 2 的取值范围是()A ． e 2B ．e 2 1C.1 2 ln ,2 ln , e0， eeee 2 D ．ln ,02e第Ⅱ卷（共 90 分） 二、填空题（每题 5 分，满分 20 分，将答案填在答题纸上）13. 已知函数 yf ( x) 是定义在 R 上的奇函数，则3 21 dx ．f x1x14. 已知函数 f xa sin xb cosx ，若 fx f x ，则函数 y 3ax b 1 恒过定点．4415. 已知几何体的三视图如图所示，其中俯视图为一正方形，则该几何体的表面积为．316. 若函数 f x 的图象上存在不同的两点A x 1 , y 1 ,B x 2 , y 2 ，其中 x 1 , y 1, x 2 ,y 2 使得 x 1x 2 y 1 y 2x 12 y 12x 22 y 22 的最大值为 0，则称函数 f x 是“柯西函数” . 给出下列函数：① f x ln x 0 x 3 ；② f xx 1 x0 ；x③ f x2 x 2 8 ；④ f x2 x 28 .其中是“柯西函数”的为（填上所有正确答案的序号）．三、解答题 （本大题共 6 小题，共 70 分 . 解答应写出文字说明、证明过程或演算步骤 . ）17. 设数列 a n 的前 n 项和为 S n ，数列 S n 的前 n 项和为 T n ，满足 T n 2S n n 2, n N.( Ⅰ ) 求 a 1 , a 2, a 3 的值；( Ⅱ ) 求数列a n 的通项公式.18. 某小店每天以每份 5 元的价格从食品厂购进若干份食品，然后以每份10 元的价格出售 . 如果当天卖不完，剩下的食品还可以每份1 元的价格退回食品厂处理 .( Ⅰ 若小店一天购进 16 份，求当天的利润 y （单位：元）关于当天需求量 （单位：份，n N ） )n的函数解析式；4( Ⅱ ) 小店记录了 100 天这种食品的日需求量（单位：份），整理得下表：日需求量 n 14 15 16 17 18 19 20 频数10 20 16 16 15 13 10 以 100 天记录的各需求量的频率作为各需求量发生的概率.(i)小店一天购进16 份这种食品，X 表示当天的利润（单位：元），求X的分布列及数学期望；(ii) 以小店当天利润的期望值为决策依据，你认为一天应购进食品16 份还是 17 份？19 如图，在四棱锥P A BCD 中， ABCD 是平行四边形，AB BC 1, BAD 120 ，PB PC2,PA 2, E,F 分别是 AD, PD 的中点.( Ⅰ ) 证明：平面EFC平面PBC；5( Ⅱ) 求二面角A BC P 的余弦值.20. 已知椭圆 C :x2y 2 1 a b 0 的离心率为 3， A 1、A 2 分别为椭圆 C 的左、右顶点a 2b 22点P2, 1 满足 PA 1 PA 2 1. ( Ⅰ) 求椭圆C 的方程；( Ⅱ ) 设直线l 经过点P 且与C 交于不同的两点M 、 N ，试问：在x 轴上是否存在点Q ，使得 QM 与直线 QN 的斜率的和为定值？若存在，请求出点Q 的坐标及定值；若不存在，请说明 理由 .21. 已知函数f xx1 exax 2，其中a R .2( Ⅰ ) 函数fx 的图象能否与x 轴相切？若能，求出实数a ，若不能，请说明理由；6( Ⅱ ) 求最大的整数 a ，使得对任意 x 1 R, x 2 0,，不等式 f x 1 x 2 f x 1 x 22x 2恒成立 .请考生在 22、 23 两题中任选一题作答，如果多做，则按所做的第一题记分. 22. 选修 4-4 ：坐标系与参数方程x m t cos），以坐标原点为极点，以 x已知直线 l 的参数方程为（ t 为参数，y t sin轴正半轴为极轴建立极坐标系，曲线 C 的极坐标方程为4cos ，射线 4, ， 分别与曲线 C 交于 A 、 B 、 C 三点（不包括极点 444O ） .(Ⅰ)求证：OBOC 2OA ；7( Ⅱ ) 当时，若B、C两点在直线l 上，求m与的值.12已知函数 f x 2x a 2 x 2a .( Ⅰ ) 若f 13 ，求实数a的取值范围；( Ⅱ ) 若不等式f x 2恒成立，求实数a的取值范围.2018 届广东省六校第三次联考理科数学参考答案一、选择题1-5: BADAA6-10: CCBCA 11、12：DD8二、填空题13. ln 314.1，315.42 23 216.①④三、解答题17.解：(Ⅰ)∵ S 1 T 12 S 1 1 , S 1 1 a 1 ，∴ a 1 1. ∵ S 1 S 2 T 2 2S 2 4 , ∴ a 2 4 .∵ S 1S 2 S 3 T 3 2S 3 9 , ∴ a 3 10 .( Ⅱ ) ∵ T n 2S n n 2①， T n12S n 1x 1 2, ②，∴① - ②得， S n 2a n 2n 1 n2，∵S 12a 1 2 1 1 ，∴ S n2a n 2n 1 n 1 , ③，Sn 1 2a n 1 2n 3,④，③ - ④得， a n2a n12 n2 ，a n 2 2(a n 1 2) .12 3 ，∴a n 2是首项3 公比 2 的等比数列，a n 23 2n 1 ，∵ a故a n 32n 12 .18. 解： ( Ⅰ ) 当日需求量 n 16 时，利润 y 80 ，当日需求量 n16 时，利润 y 5n 4(16 n) 9n 64 ，所以 y 关于 n 的函数解析式为y9n 64, n16N .80, n 16 n( Ⅱ )(i) X 可能的取值为 62， 71，80，并且PX62 0.1, P X 710.2, P X80 0.7 . X 的分布列为：X 62 71 80 P0.10.20.7X 的数学期望为 E X62 0.1 71 0.2 80 0.7 76.4 元 .(ii) 若小店一天购进17 份食品， Y 表示当天的利润（单位：元） ，那么 Y 的分布列为9Y 58 67 76 85 P0.10.20.160.54Y 的数学期望为 E Y 58 0.1 67 0.2 76 0.16 85 0.54 77.26 元.由以上的计算结果可以看出，E X E Y , 即购进 17 份食品时的平均利润大于购进 16 份时的平均利润．所以，小店应选择一天购进17份. 19.解法一： (Ⅰ)取BC 中点G ，连PG,AG,AC ,∵PBPC ,∴ PG BC , ∵ ABCD 是平行四边形， AB BC 1 , BAD 120,∴ ABC 60,∴ ABC 是等边三角形，∴ AG BC ,∵ AG PG G ,∴BC 平面 PAG ,∴ BCPA .∵ E,F 分别是 AD,PD 的中点 ,∴ EF // PA ,EC// AG , ∴BC EF , BC EC ,∵EF EC E ,∴BC 平面EFC , ∵ BC 平面 PBC , ∴平面 EFC 平面 PBC . (Ⅱ)由(Ⅰ)知PGBC,AG BC , ∴ PGA 是二面角 A BC P 的平面角.∵PG21 7,AG3,PA 2,422在 PAG 中，根据余弦定理得PG 2 AG 2 PA 221,cos PGA,2PG AG 7102018 届广东省六校第三次联考理科数学及答案解析∴二面角 A BC P 的余弦值为21. 7解法二：( Ⅰ ) ∵ABCD是平行四边形，AB BC1 ,BAD 120 ，∴ADC60 ,∴ADC 是等边三角形，∵E是AD的中点，∴CE AD,∵AD//BC,∴CE BC.分别以 CE,CB 的方向为x轴、y轴的正方向，C 为坐标原点，如图建立空间直角坐标系.则C 0,0,0 ,E3,0,0 ,A3,1,0 , D 3 ,1,0 ,2 2 2 2 22 2 23 , y 1 , z 1，设 P x, y, z ，∵ PB PC 2 , PA 4 ,解得x2 2∴可得 P3,1,1 , 2 2∵ F 是 PD 的中点，∴F 0,0,1,∵CB CF 0,∴CB CF,∵CE BC,2CE CF C,∴BC 平面 EFC ,∵ BC 平面 PBC ,∴平面 EFC 平面 PBC .(Ⅱ)由(Ⅰ)知，CB 0,1,0 , CP 3,1,1 , 设n x, y, z 是平面 PBC 的法向量，则2 2112018 届广东省六校第三次联考理科数学及答案解析 CB n ，∴ CB n y 03 x ，CP n CP n 1 y z 02 2令 x 2 ，则n ( 2,0, 3) ，又 m (0,0,1) 是平面ABC 的法向量，∴ cos m, n m n 21m n ，7∴二面角 A BC P 的余弦值为 21 .7注：直接设点 F 0，0，z ，或者说 CF 平面 ABCD , PA AD ，酌情扣分 .20. 解： ( Ⅰ ) 依题意， ,0 、 ， ， ，A 1a A 2 a,0 P 2 1∴ PA 1 PA 2 （ a 2,1) a 2,1 5 a 2 ,由 PA 1PA 2 1, a 0 , 得 a 2 ，∵ e c 3a ，2∴ c 3,b 2 a 2 c 2 1 ，故椭圆 C 的方程为 x 2 y 2 1 .4( Ⅱ ) 假设存在满足条件的点 Q t,0 . 当直线 l 与 x 轴垂直时，它与椭圆只有一个交点，不满足题意.因此直线 l 的斜率 k 存在，设 l : y y 1 k(x 2)1 k( x 2) ，由 x2 y 2，消 y 得141 4k2 x 2 16k 2 8k x 16k2 16k 0 ，设 M x 1 , y 1 、N x 2 , y 2 ，则 x 1 x 2 16k 2 8k , x 1x 2 16k 2 16k1 4k2 1 4k 2，∵ k QM k QN y 1 y 2 kx 1 2k 1 x 2 t kx 2 2k 1 x 1 tx 1 t x 2 t x 1 t x 2 t122kx1x2 2k 1 kt x1 x2 2 2k 1 t 4t 8 k 2t，x1x2 t x1 x2 t 2 4 t 2 2 k 2 8 2 t k t 2∴要使对任意实数k,k QMk QN为定值，则只有t 2 ，此时， k QMkQN 1 .故在 x 轴上存在点Q2,0 , 使得直线QM与直线QN的斜率的和为定值 1.21.解： ( Ⅰ ) 由于f '( x) xe x ax .假设函数 f x 的图象与 x 轴相切于点t,0 ，f (t ) 0t 1e'at20.2则有f '(t)，即0 te' at 0显然 t 0, e' a 0 代入方程t 1 e' at2 0 中得， t 2 2t 2 0 . 2∵ 4 0 ，∴无解．故无论 a 取何值，函数 f x 的图象都不能与x 轴相切. ( Ⅱ ) 依题意，f x1 x2 f x1 x2 x1 x2 x1 x2f x1 x2 x1 x2 f x1 x2 x1 x2 恒成立 .设 g x f (x) x ，则上式等价于g x1 x2 g x1 x2 ，要使 gx1 x2 g x1 x2, 0, 恒成立，即使 g x x a 2x 在R上单调递增，对任意x 1 e x x1 R x2 2∴ g'( x) xe x ax 1 0在R上恒成立.则 g' (1) e a 1 0, a e 1 ，∴ g' ( x) 0 在R上成立的必要条件是： a e 1 . 下面证明：当 a 3时， xe x 3x 1 0恒成立.设x，则xh x e x 1'(x)e1 ，当x 0时， h' (x) 0，当x 0时， h' ( x) 0 ，h∴ h(x)min h(0) 0 ，即x R,e x x 1. 那么，当 x 0 时，xe x x2 x, xe x 3x 1 x2 2x 1 x 1 2 0 ；当 x 0 时， e x 1, xe x 3x 1 x(e x 3 1 ) 0 ，∴ xe x 3x 1 0 恒成立 .x因此， a 的最大整数值为 3.22. 解： ( Ⅰ ) 证明：依题意，OA 4cos ，13OB 4 cos , OC 4 cos4 ，4则 OB OC 4 cos4 4 cos44 2 cos 2OA .(Ⅱ)当12 时， B、 C 两点的极坐标分别为2，，2 3，，3 6化直角坐标为B1，3，C 3， 3 .经过点 B、 C 的直线方程为y 3 x 2 ，又直线 l 经过点m,0 ，倾斜角为，故 m 2, 2. 323. 解： ( Ⅰ ) ∵f 1 3 ，∴ a 1 2a 3 ，①当 a 0 时，得 a (1 2a) 3, a 2，∴2a 0 ；3 3②当 01时，得 a (1 2a) 3, a2 ，∴0 a1a ；2 2③当 a 1(1 2a) 3, a4 1a4 时，得 a3，∴.2 2 3综上所述，实数 a 的取值范围是2 4. 3，3( Ⅱ ) ∵f xa1 x 2a ，根据绝对值的几何意义知，当x 1ax 的值2 x 时， f2 2最小 ,∴ f 1 a 2，即1 5a 2 ，2 2解得 a 6 2, 26,.或 a . ∴实数a的取值范围是5 5 5 514。

绝密★启用前2018届广东省六校第三次联考文科数学注意事项：1．答题前，考生务必将自己的姓名、准考证号、座位号、学校、班级等考生信息填写在答题卡上。

2．作答选择题时，选出每个小题答案后，用2B 铅笔把答题卡上对应题目的答案信息点涂黑。

如需改动，用橡皮擦干净后，再选涂其它答案，写在本试卷上无效。

3．非选择题必须用黑色字迹签字笔作答，答案必须写在答题卡各题指定的位置上。

4．考试结束后，将本试卷和答题卡一并交回。

一、选择题：本题共12小题，每小题5分，共60分. 在每题给出的四个选项中，只有一项符合题目要求. 1.函数()ln(1)f x x =++的定义域为（ ） A ．(2,)+∞ B ．(1,2)(2,)-+∞U C ．(1,2)- D ．(]1,2- 2.如果复数ibi212+-(其中i 为虚数单位，b 为实数)的实部和虚部互为相反数，那么b 等于( ) A ．6- B ．32 C ．32- D ．23.高考结束后，同学聚会上，某同学从《爱你一万年》，《非你莫属》，《两只老虎》，《单身情歌》四首歌中选出两首歌进行表演，则《爱你一万年》未选取的概率为（ ）A ．13B ．12 C ．23 D ．564.圆22(2)4x y -+=关于直线y x =对称的圆的方程是（ ）A ．22((1)4x y +-=B ．22((4x y -+-=C ．22(2)4x y +-=D ．22(1)(4x y -+=5．某几何体的三视图如图所示，且该几何体的体积是3，则正视图中的x 的值是( )A ．2 B.29 C. 23D ．3 6.已知sin()3cos()sin()2πθπθθ++-=-，则2sin cos cos θθθ+=（ ）A ．15B ．25C ．35D 57.实数x 、y 满足000x y x y c ≤⎧⎪≤⎨⎪+-≥⎩，且x y -的最大值不小于1，则实数c 的取值范围是( )A ．1c ≤-B ．1c ≥-C ．2c ≤．2c ≥8.函数x x x f cos )(=的导函数)(x f '在区间],[ππ-上的图像大致是（ ）A. B. C. D.9.三棱锥ABC P -中，ABC PA 平面⊥且2=PA ，ABC ∆是边长为3的等边三角形，则该三棱锥外接球的表面积为( )A.34πB ．π4C ．π8D ．π20 10.自主招生联盟成行于2009年清华大学等五校联考，主要包括“北约”联盟，“华约”联盟，“卓越”联盟和“京派”联盟．在调查某高中学校高三学生自主招生报考的情况，得到如下结果： ①报考“北约”联盟的学生，都没报考“华约”联盟②报考“华约”联盟的学生，也报考了“京派”联盟③报考“卓越”联盟的学生，都没报考“京派”联盟④不报考“卓越”联盟的学生，就报考“华约”联盟根据上述调查结果，下列结论错误的是（ ）A ．没有同时报考“华约” 和“卓越”联盟的学生B ．报考“华约”和“京派”联盟的考生一样多C ．报考“北约” 联盟的考生也报考了“卓越”联盟D ．报考“京派” 联盟的考生也报考了“北约”联盟11.设120172016,log log a b c ===,,a b c 的大小关系为（ ）A ．a b c >>B ．a c b >> C. b a c >> D ．c b a >>12. 已知双曲线E ： 22x a﹣22y b =1（0,0>>b a ），点F 为E 的左焦点，点P 为E 上位于第一象限内的点，P 关于原点的对称点为Q ，且满足FQ 3PF =，若b =OP ，则E 的离心率为（ ）A.二．填空题：本题共4小题，每小题5分。