模拟试题三
模拟试题3
市场营销学-模拟试题3一、单选题(每题1分,共40分)1.通过过程的比较,发现隐藏在不同企业或不同部门市场营销绩效差异背后的关键因素,以便使企业经营管理的效率和效益赶上或超过竞争对手的定点超越称为()A.产品定点超越B.过程定点超越C.组织定点超越D.战略定点超越2.国内某钢铁企业,利用自己在商标、技术、市场、资金等方面的优势,通过兼并收购其它钢铁企业来壮大自己,该企业采用的一体化增长方式属于()A.水平一体化B.前向一体化C.后向一体化D.同心多元化3.某家电生产企业从其目标市场的顾客中,按照随机原则抽取了50名顾客进行问卷调查,以了解目标顾客对其产品的认知、偏好等原始信息,该企业这种收集原始数据的方法属于()A.观察法B.实验法C.调查法D.专家估计法4.某家用电器企业不仅生产经营家电类产品,还跨行业经营房地产、机械、农副产品等多种业务,这种战略是()A.市场渗透战略B.市场开发战略C.产品开发战略D.多元化经营战略5.行业吸引力大,业务力量强的战略业务单位在多因素投资组合矩阵中处于()A.黄色地带B.红色地带C.绿色地带D.白色地带6.在市场营销系统中,主要用于了解外部环境发展趋势信息的子系统为()A.内部报告系统B.市场营销调研系统C.市场营销情报系统D.市场营销分析系统7.将企业的注意力侧重于生产高质量、多功能高值产品的经营观念是()A.产品观念B.生产观念C.市场营销观念D.推销观念8.在战略业务单位的评价中,对于瘦狗类产品应采取的战略是()A.保持战略B.发展战略C.增大战略D.放弃战略9.保护消费者权益组织、环境保护组织、少数民族组织属于()A.媒体公众B.一般公众C.政府公众D.市民行动公众10.向企业供应原材料、部件、能源、劳动力和资金等资源的企业或组织称为()A.供应商B.商人中间商C.辅助商D.代理中间商11.市场挑战者最间接的进攻战略是()A.正面进攻B.侧翼进攻C.包围进攻D.迂回进攻12.某公司以补贴价格和差异很小的产品攻击另一个同类企业的核心市场,对被攻击公司而言,该公司属于()A.理性的竞争者B.破坏性的竞争者C.良好的竞争者D.善良的竞争者13.在菲律宾,生力啤酒公司的白威士忌受到亚洲啤酒公司“虎”牌啤酒的挑战,生力公司为应付这一挑战,推出了“金鹰”品牌,结果取得了防御成功。
2024年全国普通高中九省联考仿真模拟数学试题(三)
2024年高考仿真模拟数学试题(三)试卷+答案本套试卷根据九省联考题型命制,题型为8+3+3+5模式,适合黑龙江、吉林、安徽、江西、甘肃、河南、新疆、广西、贵州等省份考生模拟练习.一、选择题:本题共8小题,每小题5分,共40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.某校高三年级一共有1200名同学参加数学测验,已知所有学生成绩的第80百分位数是103分,则数学二、选择题:本题共3小题,每小题6分,共18分.在每小题给出的选项中,有多项符合题目要求.全部选对的得6分,部分选对的得部分分,有选错的得0分.9.非空集合A具有如下性质:①若x,y∈A,则;②若x,y∈A,则x+y∈A下列判断中,正确的有()A.﹣1∉A B.C.若x,y∈A,则xy∈A D.若x,y∈A,则x﹣y∈A三、填空题:本题共3小题,每小题5分,共15分.四、解答题:本题共5小题,共77分.解答应写出文字说明、证明过程或演算步骤.15.(13分)两个安全设备间由一组对接码进行“握手”连接,对接码是一个由“1,2,3,4”4个数字组成的六位数,每个数字至少出现一次. (1)求满足条件的对接码的个数;(2)若对接密码中数字1出现的次数为X ,求X 的分布列和数学期望.16.(15分)已知函数()()ln 1f x x a x =−−. (1)当1a =时,讨论()f x 的单调性; (2)若()f x 有两个零点,求a 的取值范围.2024年高考仿真模拟数学试题(三)试卷+答案(题型同九省联考,共19个题)注意事项:].答卷前,考生务必将自己的考生号、姓名、考点学校、考场号及座位号填写在答题卡上.2.回答选择题时,选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑.如需要改动,用橡皮擦干净后,再选涂其他答案标号.回答非选择题时,将答案写在答题卡上.写在本试卷上无效.3.考试结束后,将本试卷和答题卡一并交回.一、选择题:本题共8小题,每小题5分,共40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.某校高三年级一共有1200名同学参加数学测验,已知所有学生成绩的第80百分位数是103分,则数学二、选择题:本题共3小题,每小题6分,共18分.在每小题给出的选项中,有多项符合题目要求.全部选对的得6分,部分选对的得部分分,有选错的得0分.9.非空集合A具有如下性质:①若x,y∈A,则;②若x,y∈A,则x+y∈A下列判断中,正确的有()A.﹣1∉A B.C.若x,y∈A,则xy∈A D.若x,y∈A,则x﹣y∈A答案ABC解析:对于A,假设﹣1∈A,则令x=y=﹣1,则=1∈A,x+y=﹣2∈A,令x=﹣1,y=1,则=﹣1∈A,x+y=0∈A,令x=1,y=0,不存在,即y≠0,矛盾,∴﹣1∉A,故A对;对于B,由题,1∈A,则1+1=2∈A,2+1=3∈A,…,2022∈A,2023∈A,∴∈A,故B对;对于C,∵1∈A,x∈A,∴∈A,∵y∈A,∈A,∴=xy∈A,故C对;对于D,∵1∈A,2∈A,若x=2,y=1,则x﹣y=1∈A,故D错误.故选ABC.的部分图三、填空题:本题共3小题,每小题5分,共15分.四、解答题:本题共5小题,共77分.解答应写出文字说明、证明过程或演算步骤.15.(13分)两个安全设备间由一组对接码进行“握手”连接,对接码是一个由“1,2,3,4”4个数字组成的)连接当5k ≥时,可得()111k k ii a a a i k −+−=≤≤−, (∗) ②设32i k ≤≤−,则112k i k k a a a a a −−+>+=,所以{}1k i n a a a −+∉, 由111213320k k k k k k k a a a a a a a a a −−−−−−=−<−<<−<−= , 又由12320k k a a a a −−≤<<<< ,可得111122133133,,k k k k k k k k a a a a a a a a a a a a −−−−−−−−−=−=<−=−= , 所以1(13)k k ii a a a i k −−−=≤≤−, 因为5k ≥,由以上可知:111k k a a a −−−=且122k k a a a −−−=, 所以111k k a a a −−−=且122k k a a a −−−=,所以1(11)k k ii a a a i k −−−=≤≤−,(∗∗) 由(∗)知,()111k k ii a a a i k −+−=≤≤− 两式相减,可得()1111k k i i a a a a i k −+−=−≤≤−, 所以当5k ≥时,数列{}n a 为等差数列. ……………17分.。
大学英语三级模拟试题(三)
大学英语三级模拟试题(三)TEST 3Part I Listening Comprehension (15%)Part II. Vocabulary and Structure (20%)Directions: There are 20incompleete sentences in this part. For each sentence there are four choices marked A), B), C), D).Choose the ONE that best completes the sentence. Then mark the corresponding letter on the Answer Sheet with a single line through the center.13. She is not very ______about money only when it comes spending.A) Sensible B) sensitive C) senseless D) insensitive14. Cold and humid is this ______climate in spring of this west city.A) Common B) general C) usual D) ordinary15. If only I _____about his coming, I would have met him at the station.A) Would know B) had known C) have known D) knew16._____she is in London, she will ring up her old friend Mary.A) As soon as B) As C) No sooner D) While17. The reason why coal is still a very valuable source of power is _____atomic power is not available in sufficient quantity.A) Because B) that C) as D) for18. We moved to the front now ______ we could hear and see better.A) So as B) so that C) because D) such that19. He is very stubborn so asking him to change his mind is ______.A) out of the question B) out of questionC) Out of order D) out of place20. We took ______of the fine weather and spent the evening on the beach.A) Change B) opportunity C) advantage D) use21. After______ for the job ,you will be required to take a written test.A) interviewing B) being interviewed C) interviewed D) having interviewed22. We would have paid______ for the machines, if the company had insisted , because we really wanted them.A) as much twice B) twice as much C) twice much D) twice so much23. Her smile ______ that she had forgiven me.A) applied B) implied C) justified D) supplied24. It is very surprised that the driver was not ______ at all in the car accident.A) injured B) wounded C) hurt D)damaged25. Scarcely ______ one task when he was asked to do another.A) has he finished B)had he finished C) he has finished D)he had finished26. He offered a reward to _____ should return the lost ring.A) who B) whom C) whoever D) whomever27. Look at the clock! It’s time ______ home.A) we’ll go B ) we went C) we’re going D) we should go28. After going to dozens of job interviews , she eventually ______ to get a job.A) gained B) succeeded C) managed D) achieved29. The words of his old teacher left a _______ impression on his mind. He is still influenced by them. A) long B) lively C) lasting D) wide30. They tried to silence the _____ audience but in vain.A) exciting B) excited C) excite D) being exciting31. Between 1974 and 1997, the number of overseas visitors expanded ______ 27%.A) by B) for C) to D) in32. He is _______ about his chances of winning a gold medal in the Olympics next year.A) optimistic B) optional C) outstanding D) obviousPart III. Reading Comprehension (40%)Directions: There are four passages in this part. Each passage is followed by five questions or unfinished statements. For each question, there are four choices marked A B C and D. You should choose the best answer. Then mark the corresponding letter on the Answer Sheet with a single line through the center.Passage OneQuestions 33 to 37 are based on the following passage.Microsoft Corporation is the leading developer of personal-computer software systems and applications. The company also publishes books and multimedia titles and offers electronic mail services. It has sales offices throughout the world but does virtually all of its research and development at its corporate headquarters in Redmond, Washington, U.S.In 1975 Bill Gates and Paul G. Allen, two boyhood friends from Seattle, converted BASIC, a popular mainframe programming language, for use on an early personal computer (PC) ,the Altair. Shortly afterward Gates and Allen founded Microsoft, deriving the name from the words “microcomputer” and “software”. Dur ing the next few years they refined BASIC and developed other programming languages. In 1980 International Business Machines Corporation (IBM) askedMicrosoft to produce the essential software, or operating system, for its first personal computer, the IBM PC. Microsoft purchased an operating system from another company, modified it, and renamed it MS-DOS( Microsoft Disk Operating System). MS-DOS was released with the IBM PC in 1981. Thereafter , most manufacturers of personal computers licensed MS-DOS as their operating system , generating vast revenues for Microsoft; by the early 1990s it had sold more than 100 million copies of the program and defeated rival operating systems such as CP/M ,which it displaced in the early 1980s, and later OS/2. Microsoft deepened its position in operating systems with its Windows graphical command program, whose third version, released in 1990, gained a wide following. By 1993, Windows 3.0 and its subsequent versions were selling at a rate of one million copies per month, and nearly 90 percent of the world’s PCs ran on a Microsoft operating system. In 1995 the company released Windows 95, which for the first time fully integrated MS-DOS with Windows and effectively matched in ease of use Apple Computer’s Macintosh OS. It also became the leader in productivity software such as word-processing and spreadsheet programs, outdistancing long-time rivals Lotus and WordPerfect in the process.33. What is the role of Microsoft Corporation in the world of software systems and applications/A) It’s the biggest multinational corporation. B) It’s the founder of personal computers.C) It’s the leading developer. D) It’s the largest bookseller in America.34. Besides software systems and applications, what else dose Microsoft deal in ?A) Publishing books and multimedia titles. B) Offering electronic mail services.C) Inventing program languages. D) Both A and B.35. Who established Microsoft?A) Bill Gates. B) Paul G. Allen.C) Bill Gates and Paul G. Allen. D)A group of computer experts.36. In 1980 IBM asked Microsoft to produce the operating system, they ______.A) invented it alone . B) refused to do it.C) wanted to make a perfect one, but they failed.D) bought one from another company and made a little change.37. What does the passage imply?A) Windows 3.0 fully integrated MS-DOS with Windows.B) By 1990, nearly 90 percent of th e world’s had run on Windows 3.0.C) IBM asked Microsoft to develop Windows 95.D) Microsoft surpassed Lotus and WordPerfect till 1995.Passage 2Questions 38 to 42 are based on the following passage.Sony was incorporated in 1946 as Tokyo Telecommunications Engineering corporation Its founders were Iuka Masaru, whose Japan precision Instruments Company had supplied electronic devices during World War II, and Morita Akio, an applied sciences instructor. Their business, which was funded by Morita’s father, was formed to apply the advanced technology developed during the war to the manufacture of consumer products. The company’s present name was adopted in 1958.At the beginning, the company made voltmeters(伏特计),electrically heated cushions(垫子),and similar devices. The first major consumer item it produced was a tape recorder, introduced in Japan in 1950. Since then the company, which markets its products worldwide under the Sony trademark, has continued to pioneer new technology for consumer products. In 1957 Sony introduced the world’s first pocket-sized, all-transistor (晶体管) radio. In 1960 Sony introduced an 8-inch (20-centimetre) transistorized television set, creating a new market for television.The company was one of the first to recognize the potential of the consumer videotape market, and in 1969 it introduced a color videocassette recorder for both industrial and consumer use.38. When did the company first formed?A) 1946 B) 1950 C) 1958 D) 196839. What was the first name of Sony Corporation?A) Japan Precision Instruments CompanyB) Tokyo Telecommunications Engineering Corporation.C) Sony Corporation D) Sony Engineering Corporation.40. When was the name Sony first used?A) 1946 B) 1950 C) 1958 D) 196841. What was the first major consumer article produced by the company?A) V oltmeters. B) Electrically heated cushions.C) Resonator sound generators D) An audio tape recorder.42. Who founded Sony Corporation?A) Ibuka Masaru. B) Morita Akio. C) Morita’s father D) Ibuka Masaru and Morita Akio Passage 3Questions 43 to 47 are based on the following passage.Internet is a system architecture that has revolutionizedcommunications and methods of commerce by allowing various computer networks around the world to interconnect. Sometimes referred to as a “network of network,” the Internet emerged in the United States in the 1970s but did not become visible to the general public until the early 1990s. By the beginning of the 21stcentury approximately 360 million people, or roughly 6 percent of the world’s p opulation, were estimated to have access to the Internet. It is widely assumed that at least half of the world’s population will have some form of Internet access by 2010 and that wireless access will play a growing role.The Internet provides a capability so powerful and general that it can be used for almost any purpose that depends on information, and it is accessible by every individual who connects to one of its constituent networks. It supports human communication through electronic mail ( e-mail), “c hat rooms,”newsgroups, and audio and video transmission and allows people to work collaboratively at many different locations. It supports access to digital information by many applications, including the World Wide Web. The Internet has proved to be a spa wning ground for a large and growing number of “e-businesses” that carry out most of their sales and services over the Internet. Many experts believe that the Internet will dramatically transform business as well as society.43. What is Internet according to the passage?A) A system architecture that allows various computer networks around the world to inter-connect.B) An architecture that has revolutionized communications and methods of commerce.C) “Network of networks”.D) World Wide Web.44. When did Internet first appear?A) 1970s. B) 1980s. C) 1990s. D)2010s.45. What will come true according to the passage?A) Approximately 360 million people will access to the Internet.B) Roughly 6 percent of the world’s population will access to the Internet.C) At least a quarter of the world’s population will have some form of Internet access.D) Wireless access will play a growing role.46. According to the author, who can access to the Internet?A) Anyone.B) The one who has any purpose that depends on information.C) Every individual who connects to one of its constituent networks.D) The people who are skilled in computer.47. If people want to work collaboratively at different locations, what can the do?A) They can use electronic mails.B) They can work through “chat rooms”.C) They can work through audio and video transmission.D) All the above.Passage FourQuestions 48 to 52 are based on the following passage.Mitchell attended Washington Seminary(神学院)in her native Atlanta, Georgia, before entering Smith College in 1918. When her mother died the next year, she returned home. Between 1922 and 1926 she was a writer and reporter for the Atlanta Journal.After an ankle injury in 1926 she left the magazine and, for the next 10 years, worked slowly on a romantic novel about the Civil War and Reconstruction as seen from a Southerner point of view. Scarlett O’Hara is the heroine of novel, and she is a strong-willed woman. The novel had absorbed the tragedy of the war and the romance of the history. Mitchell worked at her novel occasionally, composing episodes(情节) out of sequence and later fitting them together. She apparently had little thought of publication at first, and for six years after it was completely finished, the novel lay unread. But in 1935 Mitchell was persuaded to publish her manuscript.It appeared in 1936 as Gone with the Wind. Within six months 1,000,000 copies had been sold; 50,000 copies were sold in one day. It went on sell more copies than any other novel in U.S. publishing history, with sales passing 12 million by 1965, and was eventually translated into 25 languages and sold in 40 countries. It was awarded the Pulitzer Prize in 1937. The movie rights were sold for $50,000. The film, starring Vivien Leigh and Clark Gable and produced by David O. Selznick, premiered in Atlanta in December 1939 after an unprecedented period of advance promotion, including the highly publicized search for an actress to play Scarlett. It won nine major Oscars and two special Oscars at the Academy Awards and for two decades reigned as the top money-making film of all time. Mitchell, who never adjusted to the celebrity that had befallen her and who never attempted another book, died after an automobile accident in 1949. Four decades after Mitchell’s death, a sequel(续集) named Scarlett appeared.48. When did Mitchell begin her novel?A) In 1918. B) Between 1922 and 1926. C) In 1926. D) In 1936.49. According to the passage, which of the following is true?A) When Mitchell mother died, she continued her study.B) After an ankle injury in 1926, Mitchell became disabled.C) Mitchell wrote her novel from a Northern point of view.D) Mitchell didn’t write her novel for publication first.50. The name of Mitchell’s first novel is “_______”.A) Atlanta Journal B) Civil War and ReconstructionC) Lost Cause D) Gone with the Wind51. Who acted in the movie of Gone with the Wind?A) Vivien Leigh and Clark Gable B) Mitchell C) David O. Selznick D) Scarlett O’Hara52. When did the sequel (续集) to Margaret’s Gone with the Wind appear?A) Four weeks after Mitchell’s death. B) Four months after Mitchell’s death.C) Four years after Mitchell’s death. D) Forty years after Mitchell’s death.Part IV. Translations from English to Chinese. (15%)Directions: In this part, there are four items which you should translate into Chinese, each item consisting of one sentence. These sentences are all come from Part III of the test paper. You can refer back to the passages so as to identify their meaning in the context. Write the translation on the Translation Sheet in Test Paper.T1. (Lines1-3, Para.1, Passage1)Albert Einstein was a German-American physicist who developed the special and general and theories of relativity and won the Nobel Prize for Physics in 1921 for his explanation of the photoelectric effect.___________________________________________________________________________________________________________________________________________________ ___________ T2. (Line5-7, Para.1, Passage2)In the same room was the “Christmas pyramid,” a triangular construction of wood that had she, elves to hold Christmas figurines and was decorated with evergreens, candles, and a star.________________________________________________________________ ___________________________________________________________________________________ ___________ T3. (Line10-11, Para.1, Passage3)These difficulties were aggravated by the withdrawal of Soviet aid and technicians, who made a point of taking blueprints with them.________________________________________________________________ ___________________________________________________________________________________ ___________ T4. (Line9-12, Para. 2, Passage4)When large number of immigrants, including the Irish, went to the United States beginning in the mid 19th century, they took their Halloween customs with them, and in the 20th century Halloween became one of the principal U.S. holidays, particularly among children.________________________________________________________________ ___________________________________________________________________________________ ___________ Part V. Writing (15%)Directions: For this part, you are allowed 30 minutes to write a composition of no less than 80 words. Remember your composition must be written according to the following outline.Write your composition on the Composition Sheet.Outline: 1.申请人:张燕,女,24岁,出生于成都市,未婚;2.文化程度:1999年7月毕业于四川工商职业技术学院,专业是商务英语,优秀学生;3.经历:曾任某合资企业总经理秘书3年,擅长电脑操作和口译,现得知贵公司欲招聘英语翻译一名,特自荐;4.期望资薪:每月1000人民币;5.爱好:上网,旅游;6.外语:英语优良,日语一般;7.联系地址:成都市红星路520号一楼电话:88103547Words for reference: major in, joint venture, operateResumeJob Objective: _________________________________________________Family Name: _________________________________________________ First Name: ___________________________________________________ Tel No: _______________________________________________________ Address: ______________________________________________________ Place of Birth: __________________________________________________Age: __________________________________________________________ Sex: ___________________________________________________________ Marriage:_______________________________________________________Foreign Language: ________________________________________________Education:_______________________________________________________Salary Wanted:____________________________________________________Hobby:___________________________________________________________ Experience:_______________________________________________________Keys:Part I.Part II.13-17: BCBAB 18-22: BACCB23-27:BABCB 28-32: CCBAAPart III.33-37: CDCDD 38-42: ABCDD43-47: AADCD 48-52:CDDADPart IV.T1: 艾伯特〃爱因斯坦时一位德裔美国人,他提出了狭义和广义的相对论,并由于他的光电效应阐述而荣获1921年诺贝尔物理学奖。
2024年辽宁省沈阳市初中学业水平考试模拟试卷英语试题(三)(含答案)
2024年辽宁省初中学业水平考试(模拟卷三)英 语 试 卷(本试卷共45道题 满分90分 考试时间90分钟)考生注意:所有试题必须在答题卡指定区域内作答,在本试卷上作答无效第一部分 选择题(共50分)一、阅读理解(共20小题,每小题2分,满分40分)第一节阅读下面语言材料,从每题所给的 A 、B 、C 、D 四个选项中选出最佳选项。
AMobile phones help us keep in touch with each other.Fridges keep food cool and fresh. Televisions make our life fun.But they can get old and become e-waste as time goes by.In fact,e-waste doesn't only come from these things,but other electrical equipment as well.What is e-waste?It includes all waste with batteries or wires (电线)☑0E-waste is bad for the earth.In 2019,the world produced around 54 million tons of e waste.This is even heavier than all the adults in Europe.It increases every year.The world's e- waste will reach around 84 million tons by 2030.It leads to not only a great harm to the environment,but a waste of valuable resources (资源).In fact,e-waste includes valuable resources such as gold and silver.Besides,one smartphone battery can pollute 600,000 liters (升)of water.How can we deal with e-waste?·RecyclingYou can give it to a recycling center in your community or some recycling companies.You can also多功repair your electrical equipment instead of buying new ones.·SellingYou can put it in a second-hand market.Some people prefer to use older and cheaper products.And you can get money from these old things.·Donating (捐赠)You can donate it to someone in need or who can't afford new products.1. (新考法 · 图片理解)Which one might become e-waste as time goes by?A.2.(新考法 · 跨学科试题)Which of the following may describe the amount of e-waste from 2014 to 2030?E-waste productionA. B. C. D.3.What can we know from the passage?A.There's a little e-waste around the world.B.Two smartphone batteries can pollute 12,000,000 liters of water.G.There are only two ways to deal with e-waste.D.We can get gold and silver f rom e-waste.4. In which part of a website can we read the text?A.Food.B.Health.C.Travel.D.Environment.BOne afternoon,Grandpa wanted to bet me a big bag of popcorn that I didn't have as many true friends as I thought.I accepted the bet happily.However,I wasn't sure how I could see whether my schoolmates were true friends or not.The next day,before I went to school,Grandpa walked toward me,and it seemed like he was carrying something,but I could see nothing there.Grandpa said,“Take it,it's a special chair.Because it's invisible ,it will be difficult for you to sit on.However,if you can sit on it successfully,you can use the chair's magic power to tell who your true friends are.”I took the strange invisible chair to school.During the break,I asked everyone to stand in a circle, and I put myself in the middle with the chair.“Look!This is something amazing,”I said,and then I tried sitting on the chair.Of course,I missed it and fell to the ground.Everyone laughed.I kept trying to sit on the magic chair again and again.Finally,I did it.This time I was hovering (盘旋)in mid-air.Then I experienced the magic that Grandpa had talked about. Looking around,I saw George,Lucas and Diana holding me up,while some of my schoolmates did nothing but made funof me.D.I was quite thankful to Grandpa.He helped me test who my true friends were.That evening,we four true friends went to see Grandpa and had a great time eating popcorn.5.What bet did the writer make with his grandpa?A.He couldn't sit on the chair successfully.B.He didn't have as many true friends as he thought.C.He couldn't see who his true friends were.D.He couldn't have a big bag of popcorn.6.The underlined part "it's invisible" in Paragraph 2 probably means"A.it's funnyB.it's usefulC.it can't be seenD. it looks strange7.Why did Grandpa give the writer an invisible chair?A.To make him believe in his friends.B.To make him have a rest with his friends.C.To make him find out who his true friends were.D.To make him have a great time with his friends.8.What can we infer(推断)from the passage?A.Grandpa would never make bets with the writer from then on.B.The writer's grandpa bought him a big bag of popcorn.C.The writer took the strange invisible chair to school every day.D.George,Lucas and Diana were the writer's best friends.CThe Chinese character Fu is a necessity(必需品)in the Spring Festival celebrations.It expresses people's best wishes for the coming new year.The tradition of pasting(粘贴)the character Fu on walls and doors has been around for a long time.It's recorded that this tradition started in the Song Dynasty.The character Fucan be pasted either normally or upside down,because in Chinese,the“reversedFu”and “Fu arrives”sound similar, both being pronounced as "Fu dao le".There is a story about pasting the"reversed Fu".Zhu Yuanzhang,the firstemperor of the Ming Dynasty,once used the character Fu as a secret signal to kill afamily.To avoid the disaster,his wife Empress Ma ordered every family to paste the character Fu on the front of their own doors before the sun rose the next day.But one family pasted the character upside down,because they couldn't read or write.The next day,when the emperor ordered his soldiers to check,they found the character Fu everywhere,including the upside-down one.The emperor said angrily to the soldiers,“I will kill the family who pasted the character differently.”But Empress Ma said to the emperor,“That family pasted the character upside down on purpose. It has the same meaning as 'Fu arrives'.They did this to welcome you."After hearing this,the emperor immediately set the family free.From then on,people began to paste the character Fu upside down for the purpose of hoping for luck and honoring(尊敬)Empress Ma.9.The character Fu is used to in the Spring Festival celebrations.A.spread knowledgeB.hope for good luckC.remember Zhu YuanzhangD.mark the special family10.Why did Empress Ma order every[amily to paste the character Fu?A.To help the families.B.To kill more people.C.To show the beauty of the character Fu.D.To make her husband angry.11.Which of the following is TRUE about the story of Zhu Yuanzhang?①He used the character Fu as a secret signal to kill a family.②He was the emperor of the Song Dynasty.③He was angry when seeing the upside-down character Fu at first.④The family pasted the upside-down Fu to welcome him.⑤He didn't kill the family at last.A.①②③B.③④⑤C.①③⑤D.②③⑤12.What can you infer(推断)from the text?A.The emperor was very kind.B.Pasting the character Fu started from the Ming Dynasty.C.Every family pasted the character Fu upside down from then on.D.People were very thankful to Empress Ma.DThanks to Earth,we have fresh air to breathe,clean water to drink and warm sunshine to enjoy. But it seems that we may have considered those things natural and haven't realized that our planet is getting“sick”.Now scientists have given us a warning.“More than 15,000 scientists around the world have written a letter to warn about environmental problems,”The Washington Post reported.Among those environmental challenges,climate change sits at the top. Global average temperatures have risen by more than 0.5 ℃since 1992.A half-degree temperature rise is a big deal. It means that heatwaves would last around a third longer and rainstorms would be about a third more intense(激烈的).The increase in sea levels would be much higher,according to NASA.But this is not the only problem people are facing.It's getting harder to get fresh water.Ocean pollution has become serious.Since 1992,the human population has grown by about 3 billion,while the population of all other animals has dropped by nearly 30percent.Scientists say that we are experiencing the sixth mass extinction(灭绝)in history.More than two-thirds of the world's wildlife could be gone by the end of the decade if action isn't taken soon,according to the World Wildlife Fund.However,we have made some progress by making the hole in the ozone layer(臭氧层)smaller. That's because we gradually stopped using chemicals that can break down ozone.This progress shows that we can make positive changes when we take action,the letter says.13.What are the scientists worried about in the letter?A.The overuse of natural resources.B.Deadly diseasesC.The growth of human population.D.Environmental problems.14.What does the underlined word “this” in Paragraph 4 refer to?A.The heatwave.B.The rainstorm.C.Climate change.D.Sea level.15.The writer wrote this passage toA.ask people to give thanks to EarthB.help people do scientific researchC.call on people to protect our planetD.show the progress people have made16.How is the text organized?(①=Paragraph 1,②=Paragraph 2..)B. C. D.第二节阅读短文,从方框内所给的选项中选出可以填入空白处的最佳选项,其中有一个多余的选项。
2024届高考语文(新高考全国Ⅰ卷)学情检测模拟试题(三)含解析
2024届高考语文(新高考全国Ⅰ卷)学情检测模拟试题(三)一、现代文阅读(本大题共9小题,共60分)阅读下面的文字,完成下面小题。
材料一:传统的扎染艺术,色彩风格大致分为两个类别。
一类是以大理白族为代表的靛蓝为主的蓝白色调风格,另一类是以四川自贡为代表的红白、绿白等鲜艳浓烈的色调风格。
不论是怎么样的色彩风格,植物染料都是民间印染技艺的主要原料。
除了植物染料,扎染在染色时也会使用矿物质染料,用色相对被划分为红、黄、蓝色系。
扎染的艺术魅力也体现在了色彩的表现形式上。
单色扎染的晕染效果具有中国写意画般的意境,与之不同的是,多色套染则呈现不同色彩的视觉碰撞,有强烈的视觉刺激,让人产生新的梦幻般的视觉享受。
除了这两种染色技法,常见的还有涂染着色法、罩染着色法、局部防染法,艺术效果各异,但都具有独特的魅力。
相较云南大理白族地区凝重、素雅的蓝白扎染而言,以四川自贡地区为主的蜀缬色彩浓烈、绚丽多彩,可以说是久负盛名。
早在唐代,民间献入宫廷的织物里面就有四川蜀缬。
四川蜀缬的工艺技法可以说是极为丰富,针法灵活,会运用绞、缝、扎、捆、叠、缚、夹等多种结扎技法,图形纹样也会设计使用多种吉祥寓意的纹样,例如我们熟知的牡丹、荷花、凤凰等等,在结扎时每个结的大小、松紧、稀密又各不相同,与此同时,其在染色时也格外注意色彩的层次变化,所以四川蜀缬扎染到最后的艺术成品就各有不同,绚丽多姿。
它常常用深色染料作为背景,突出多次套色而形成的多种色彩融合,艺术风格鲜艳而又浓烈。
扎染图案纹样多种多样,主要是以点、线、面为主的几何纹样和具有特殊意义的民间图腾这两种最为经典。
民间图腾大多数为写实图案,通常反应自然界中的动物、风景,或者日常生活中的人物、生活场景,以艺术的手法(寓意、象征、虚构等)将其展现在织物上,例如传统的五福捧寿、松鹤延年、莲生贵子等图样。
与之相比,几何纹样大多数为抽象图案。
它以设计最为基本的点、线、面去描述对象,具有高度的装饰性和艺术表达力,常常给予人们想象的空间,例如鹿胎缬、鱼子缬、玛瑙缬、青碧缬、三套缬等图样。
四川省成都外国语学校2024届高三下学期高考模拟(三)理科数学试题(含答案)
四川省成都外国语学校2024届高三下学期高考模拟(三)数学(理科)本试卷满分150分,考试时间120分钟.注意事项:1.答卷前,考生务必将自己的姓名、座位号和准考证号填写在答题卡上.2.回答选择题时,选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑.如需改动,用橡皮擦干净后,再选涂其它答案标号.回答非选择题时,将答案写在答题卡上。
写在本试卷上无效.3.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,,则( )A .B .C .D .2.已知为虚数单位,若复数为纯虚数,则实数( )A .B .2C .D .43.“”是“方程表示椭圆”的( )A .充分不必要条件B .必要不充分条件C .充要条件D .既不充分也不必要条件4.已知为锐角,若,则( )ABCD5.正方形的边长为2,是的中点,是的中点,则( )A .4B .3C .D .6.已知非零实数,满足,则下列不等式不一定成立的是( )A .B .C .D .7.已知函数,,则图象为如图的函数可能是( ){}240,A x x x x =-≤∈Z {}14B x x =-≤<A B = []1,4-[)0,4{}0,1,2,3,4{}0,1,2,3i ()242i z m m =---m =2±2-13m <<22113x y m m+=--αsin 22πα⎛⎫-= ⎪⎝⎭cos α=ABCD E AD F DC ()EB EF BF +⋅=4-3-a b 1a b >+221a b >+122a b +>24a b>1ab b>+()214f x x =+()sin g x x =A .B .C .D .8.某几何体的三视图如图所示(单位:),则该几何体的体积(单位:)是()A .B .C.D .9.已知甲同学从学校的2个科技类社团,4个艺术类社团,3个体育类社团中选择报名参加,若甲报名了两个社团,则在仅有一个是艺术类社团的条件下,另一个是体育类社团的概率( )A .B .C .D .10.鼎湖峰,矗立于浙江省缙云县仙都风景名胜区,状如春笋拔地而起,其峰顶镶嵌着一汪小湖,传说黄帝炼丹鼎坠积水成湖.白居易曾以诗赋之:“黄帝旌旗去不回,片云孤石独崔嵬,有时风激鼎湖浪,散作晴天雨点来”.某校开展数学建模活动,有建模课题组的学生选择测量鼎湖峰的高度,为此,他们设计了测量方案.如图,在山脚测得山顶得仰角为,沿倾斜角为的斜坡向上走了90米到达点(,,,在同一个平面内),在处测得山顶得仰角为,则鼎湖峰的山高为( )米()()14y f x g x =+-()()14y f x g x =--()()y f x g x =()()g x y f x =cm 3cm 22π8π223π163π356131234A P 45︒15︒B A B P Q B P 60︒PQA .B .C .D .11.已知正方体的棱长为4,,分别是棱,的中点,则平面截该正方体所得的截面图形周长为( )A .6B .CD12.已知,分别是双曲线:(,)的左右焦点,过的直线分别交双曲线左、右两支于、两点,点在轴上,,平分,则双曲线的离心率( )ABCD .二、填空题:本题共4小题;每小题5分,共20分。
江苏省南京市2025届高三英语下学期第三次模拟试题含解析
江苏省南京市2025届高三英语下学期第三次模拟试题(含解析)第一部分听力(共两节,满分30分)做题时,先将答案标在试卷上。
录音内容结束后。
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1.5分,满分7.5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. 【此处可播放相关音频,请去附件查看】When does the conversation probably take place?A. In the morning.B. In the afternoon.C. In the evening.【答案】B【解析】【原文】M: I’m so hungry, Mom. Is dinner going to be ready soon?W: We just had lunch an hour ago! And you had two full plates of breakfast when you woke up.2. 【此处可播放相关音频,请去附件查看】What is the full price of the man’s jacket?A. $15.B. $30.C. $50.【答案】B【解析】【原文】W: So, what did you buy?M: A jacket. It was a real bargain. I got it for half price, so I saved 15 dollars.W: That’s very cheap. I bought a similar o ne for 50 dollars last year.3. 【此处可播放相关音频,请去附件查看】Who is the woman?A. A passenger.B. A health worker.C. A customs officer.【答案】C【解析】【原文】M: Is the customs examination here?W: That’s right. Your passport and health certificate, please.M: Here you are.4. 【此处可播放相关音频,请去附件查看】What does the woman know about?A. Major rivers.B. Famous mountains.C. Capital cities.【答案】C【解析】【原文】M: Do you know the major rivers and famous mountains in Europe?W: Hm. Ask me about capital cities instead.5. 【此处可播放相关音频,请去附件查看】Why does the man meet the woman?A. To apply for a job.B. To sell her something.C. To reserve a seat.【答案】A【解析】【原文】W: Take a seat, Mr. Black. Could you tell me which position interests you most?M: The sales manager position.W: OK. But do you have any relevant experience?其次节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白。
高三年级模拟考试三语文试题练习二及答案解析
买橘子沈从文两人本来一股豪劲下萝卜溪,以为事情不费力即可成功。
现在僵了,大话已说出口,收不回来,十分生气。
出了滕家大门,走到橘子园边,想沿河走回去,看看河边景致,散散闷气。
侧屋空坪子里,正遇着橘子园主人女儿夭夭,①在太阳下晒刺莓果,头上搭了一块扣花首帕,辫子头扎一朵红茶花。
其时正低着头一面随意唱唱,一面用竹耙子翻扒那晒簟上的带刺小果子。
身边两只狗见了生人就狂吠起来。
夭夭抬起头时,见是两个军官,忙喝住狗,举起竹耙在狗头上打了一下,把狗打走了。
还以为两人是从橘园穿过,要到河边玩的,故不理会,依然做自己的事情。
队长平时就常听人提起长顺两个女儿,小的黑而俏。
在场头上虽见过几回,印象中不过是一朵平常野花罢了。
队长是省里中学念过书的人,所以对乡下女子便有点瞧不上眼。
这次倒因为气愤,心中存着三分好奇,三分恶意,想逗逗这女子开开心,就故意走过去和夭夭攀话,问夭夭簟子里晒的是什么东西。
且随手刁起一枚刺莓来放在鼻边闻闻。
“好香!这是什么东西?奇怪得很!”天夭头也不抬,轻声地说:“刺莓。
”“刺莓有什么用?”“泡药酒消痰化气。
”“这东西吃得?我不相信。
恐怕是毒药吧。
我不信。
”“不信就不要相信。
”“一定是放蛊的毒药。
②你们湘西人都会放蛊,我知道的!一吃下肚里去,就会生虫中蛊,把肠子咬断,好厉害!”其时那个师爷正弯下身去拾起一个顶大的半红的刺莓,做成要生吃下去的神气,却并不当真就吃。
队长好像很为他同伴冒险而担心,“师爷,小心点,不要中毒,回去打麻烦。
中了毒要灌粪清才会吐出来的!说不得还派人来讨大便讲人情,多费事!”师爷也做成差点儿上当神气,“啊呀,危险!”夭夭为两个外乡人的言行可笑,抿嘴笑笑,很天真地转过身抬起头来,看了看两个外乡人。
“你们城里人什么都不知道。
不相信,要你信。
”随手拾起一个黄中带红的果子,咬去了蒂和尖刺,往口里一送,就嚼起来了。
果汁吮尽后,噗地一下把渣滓远远吐去,对着两个军人:“甜蜜蜜的,好吃的,不会毒死你!”师爷手指面前一片橘子树林,口气装得极其温和,询问夭夭,“这是你家橘子园不是?”“是我家的,怎么样?”“橘子卖不卖?”夭夭说:“怎么不卖?”“可是我们买你卖不卖?”“在这里可不卖。
2023年高考全国甲卷物理核心考点考前适应性模拟试题(三)
2023年高考全国甲卷物理核心考点考前适应性模拟试题(三)一、单选题 (共7题)第(1)题如图所示,A、B、C为三个实心小球,A为铁球,B、C为木球.A、B两球分别连在两根弹簧上,C球连接在细线一端,弹簧和细线的下端固定在装水的杯子底部,该水杯置于用绳子悬挂的静止吊篮内.若将挂吊篮的绳子剪断,则剪断的瞬间相对于杯底(不计空气阻力,ρ木<ρ水<ρ铁)A.A球将向上运动,B、C球将向下运动B.A、B球将向上运动,C球不动C.A球将向下运动,B球将向上运动,C球不动D.A球将向上运动,B球将向下运动,C球不动第(2)题如图,一水平轻质弹簧的左端固定在竖直墙壁上,右端与一小物块相连,刚开始物块静止且弹簧处于原长状态,现对物块施加一个水平向右的拉力F使物块向右做匀加速直线运动。
弹簧始终处于弹性限度内,物块与水平地面间的动摩擦因数恒定,不计空气阻力。
下列关于拉力F随物块位移x变化的图像正确的是( )A.B.C.D.第(3)题如图所示,A、B两个木块静止叠放在竖直轻弹簧上,已知,轻弹簧的劲度系数为100N/m。
若在木块A上作用一个竖直向上的力F,使木块A由静止开始以的加速度竖直向上做匀加速直线运动,从木块A向上做匀加速运动开始到A、B分离的过程中。
弹簧的弹性势能减小了,重力加速度g取。
下列判断不正确的是( )A.木块A向上做匀加速运动的过程中,力F的最大值是12NB.木块A向上做匀加速运动的过程中,力F的最小值是4NC.从A向上做匀加速运动到A、B分离的过程中,力F对木块做功为D.从A向上做匀加速运动到A、B分离的过程中,力F对木块做功为第(4)题我国女子短道速滑队多次在国际大赛上摘金夺银,为祖国赢得荣誉。
在某次速滑接力赛中,接棒的运动员甲提前站在交棒的运动员乙前面,并且开始向前滑行,待乙追上甲时,猛推甲一把,使甲获得更大的速度向前冲出,如图所示。
在乙推甲的过程中,忽略运动员与冰面间在水平方向上的相互作用,则( )A.甲对乙的冲量大小一定等于乙对甲的冲量大小B.甲、乙的动量变化一定相同C.甲的动能增加量一定等于乙的动能减少量D.甲和乙组成的系统机械能守恒第(5)题如图所示,间距为L的两倾斜且平行的金属导轨固定在绝缘的水平面上,金属导轨与水平面之间的夹角为θ,电阻不计,空间存在垂直于金属导轨平面向上的匀强磁场,磁感应强度大小为B,导轨上端接有阻值为R的定值电阻。
山东省聊城市2023届高三高考模拟三语文试题及参考答案
山东省聊城市2023届高三高考模拟三语文试题及参考答案本试卷共四个大题,共8页。
满分150分。
考试用时150分钟。
注意事项:1.答题前,考生务必将自己的姓名、考生号等填写在答题卡和试卷指定位置上。
2.回答选择题时,选出每小题答案后,用铅笔把答题卡上对应题目的答案标号涂黑。
如需改动,用橡皮擦干净后,再选涂其他答案标号。
回答非选择题时,将答案写在答题卡上。
写在本试卷上无效。
3.考试结束后,将本试卷和答题卡一并交回。
一、现代文阅读(35分)(一)现代文阅读I(本题共5小题,17分)阅读下面的文字,完成1~5题。
材料一:文化空间是文化生存、发展与交流的场所,是特定空间、时间和其中一种或多种文化的统一体。
传统村落是承载中华传统文明与悠久历史的重要栽体,其文化空间是彰显传统文化深刻内涵的物质表现。
在快速的城镇化进程中,大量传统村落在现代生活与文化影响下开展文化空间更新与新型文化空间建设。
但是,新建空间与设施往往趋于现代风格,缺乏地域特色,缺乏对历史空间营建经验与智慧的继承。
一处村落是否能够防止自然灾害、避免外界侵犯是人们考虑的首要因素。
古语有云,“高毋近阜而用水足,低毋近水而沟防省”“建邦设都,皆凭险阻。
山川者,天之险阻也;城池者,人之险阻也;城池必依山川为固”。
从功用角度思考,如此空间选址的本质源于先民朴实的生存安全需求与防御意识。
历史上的沿黄地区长期处于战争纷乱中,是兵家必争的战略要地,人们常受外来匪患侵扰,因而需要将村落设在不易被外界发现、易守难攻的环境中,借助自然这一天然屏障形成村落的第一道防御设施。
村落街巷功能综合,一方面作为村落社会交往的主要媒介,通过线性连接将不同功能空间组织起来,提供可达路径实现人在空间与空间之间交流;另一方面则作为排水基础设施,将建筑单个空间的排水集中到街巷中,再经由街巷引导至河流或池塘中,避免降雨集中时期引发洪涝灾害;更有些村落借助复杂的街巷空间组织达到通风或防风目的,以适应当地的气候。
中考语文第三次模拟考试卷-带参考答案
中考语文第三次模拟考试卷-带参考答案学校:___________姓名:___________班级:___________考号:___________注意事项:本试题共8页,满分为150分,考试时间为120分钟。
答题前,请考生务必将自己的姓名、座号和准考证号填写在答题卡规定位置,并同时将考点、姓名、准考证号和座号填写在试题规定的位置。
答选择题时,必须使用2B铅笔填涂答题卡上相应题目的答案标号,修改时,要用橡皮擦干净,再选涂其他答案标号;答非选择题时,用0.5毫米黑色签字笔在答题卡上题号所提示的答题区域作答。
直接在试题上作答无效。
考试结束后,将答题卡交回。
一.根据要求完成1~5题。
(16分)"五四"青年节,学校开展主题为"君子自强不息"系列活动【活动一·明君子之义】"自强不息"出自《周易》中"天行健,君子以自强不息。
"这是中国传统文化的精髓,是中华民族川流不息的精神源泉之一。
不论是愚公移山,还是精卫填海,都持之以恒:不论是神农尝百草,还是大禹治水,都不屈不挠....。
中华优秀传统文化绵亘千年、博大精深,是中华文明的智慧结晶,其中蕴含的天下为公、民为邦本、为政以德、革故鼎新....、任人唯贤、天人合一、自强不息、厚德载.物、讲信修睦、亲仁善邻等,是中华民族在生产、生活中日积月累的宇宙观、天下观、社会观、道德观的重要体现,同社会主义核心价值观具有高度契.合性。
1.文段中加点字词的读音及书写,不正确的一项是()(3分)A.不屈不挠B.革故鼎新C.载物(zài)D.契合(qiè)2.文段中画横线的成语使用不恰当的一项是()(3分)A.川流不息B.持之以恒C.绵亘千年D.日积月累3.下列关于自强不息的表述,没有语病的一项是()(3分)A.自强不息是中华民族的精神根基,更是我们每个人应对各种困难挑战的内在精神动力。
2023-2024学年安徽省高考数学仿真模拟试题卷(三模)含解析
2023-2024学年安徽省高考数学仿真模拟试题卷(三模)一、单项选择题:本题共8小题,每小题5分,共40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.已知复数0z ≠,则“1z =”是“1R z z +∈”的()条件.A.充分不必要B.必要不充分C 充要 D.既不充分也不必要【正确答案】A【分析】当1z ==时,即221a b +=,12R z a z+=∈,充分性;取2z =,则15R 2z z +=∈,2z =,不必要,得到答案.【详解】设i z a b =+,,R a b ∈,当1z ==时,即221a b +=,2211i i i 2R i a b z a b a b a z a b a b-+=++=++=∈++,充分性;取2z =,则15R 2z z +=∈,2z =,不必要性.综上所述:“1z =”是“1R z z +∈”的充分不必要条件.故选:A2.若函数sin cos y a x b x =+(其中,a b R ∈,且,0a b >)可化为)y x ϕ=-,则ϕ应满足条件()A.tan ba ϕ=B.cos ϕ=C.tan a bϕ=D.sin ϕ=【正确答案】C【分析】先逆用两角和的正弦公式进行化简,再结合诱导公式,得到22k πϕθπ-=+,进而求得tan a bϕ=.【详解】sin cos y a x b x=+x x ⎫=+⎪⎭)x θ=+,其中tan baθ=,函数sin cos y a x b x =+(其中,a b R ∈,且,0a b >)可化为)y x ϕ=-,∴()sin()cos x x θϕ+=-,即sin()sin 2x x πθϕ⎛⎫+=+- ⎪⎝⎭,∴22k πϕθπ-=+()k Z ∈,∴()tan tan 22k πϕθπ⎛⎫-=+⎪⎝⎭,即cot tan ϕθ=,∴1tan tan a b ϕθ==,故选:C.本题考查了两角和的正弦公式以及诱导公式的应用,意在考查学生对这些知识的理解掌握水平,需熟记公式,属于基础题.3.某种品牌手机的电池使用寿命X (单位:年)服从正态分布()()24,0N σσ>,且使用寿命不少于2年的概率为0.9,则该品牌手机电池至少使用6年的概率为()A.0.9B.0.7C.0.3D.0.1【正确答案】D【分析】根据正态分布的对称性求解即可.【详解】由题得:()20.9P x ≥=,故()20.1P x <=,因为6242+=,所以根据对称性得.()()620.1P x P x ≥=<=故选:D.4.中国某些地方举行婚礼时要在吉利方位放一张桌子,桌子上放一个装满粮食的升斗,斗面用红纸糊住,斗内再插一杆秤、一把尺子,寓意为粮食满园、称心如意、十全十美.下图为一种婚庆升斗的规格,把该升斗看作一个正四棱台,忽略其壁厚,则该升斗的容积约为()39.6,1L 1000cm ≈=,参考公式:(13V S S h 下上棱台=++⋅)A.1.5LB.2.4LC.5.0LD.7.1L【正确答案】B【分析】由勾股定理算出高h ,即可由公式求体积.【详解】由题意,正四棱台中,设棱台的高为h ,则22222202112239236711.591.752224h 骣骣琪琪琪=-=-==琪琪琪桫桫桫,故(223120112371.2cm 2.4L 3V 棱台=⨯+≈≈.故选:B5.已知一个古典概型的样本空间Ω和事件A ,B 如图所示.其中()()()()12,6,4,8,n n A n B n A B Ω===⋃=则事件A 与事件B ()A.是互斥事件,不是独立事件B.不是互斥事件,是独立事件C.既是互斥事件,也是独立事件D.既不是互斥事件,也不是独立事件【正确答案】B【分析】由()4n A B = 可判断事件是否为互斥事件,由()()()P AB P A P B =可判断事件是否为独立事件.【详解】因为()12,()6,()4,()8n n A n B n A B Ω==== ,所以()2n A B = ,()4n A B = ,()8n B =,所以事件A 与事件B 不是互斥事件,所以()41123P AB ==,()()68112123P A P B =⨯=,所以()()()P AB P A P B =,所以事件A 与事件B 是独立事件.故选:B.6.已知定义在R 上的函数()f x 满足()()2f x f x =--,且函数()1f x +是偶函数,当[]1,0x ∈-时,()21f x x =-,则20235f ⎛⎫= ⎪⎝⎭()A.925B.1625C.3425D.4125【正确答案】C【分析】由函数(1)f x +是偶函数,可得函数()f x 的图像关于直线1x =对称,从而有()(2)f x f x -=+,再结合()2()f x f x =--可得函数()f x 的周期为4,然后利用周期和()2()f x f x =--将20235化到[]1,0-上即可求解.【详解】因为函数(1)f x +是偶函数,所以(1)(1)f x f x -=+,所以()(2)f x f x -=+,因为()2()f x f x =--,所以()(2)2f x f x ++=,所以(2)(4)2f x f x +++=,所以()(4)f x f x =+,所以函数()f x 的周期为4,所以33()(101204)()53525f f f =⨯+=,因为233334()2(21()55525f f ⎡⎤=--=---=⎢⎥⎣⎦,所以202334525f ⎛⎫=⎪⎝⎭.故选:C.7.已知椭圆E :()222210x y a b a b+=>>的两条弦AB CD ,相交于点P (点P 在第一象限),且AB x ⊥轴,CD y ⊥轴.若:::1:3:1:5PA PB PC PD =,则椭圆E 的离心率为()A.5B.105C.5D.5【正确答案】B【分析】设(),,P m n PA t =,进而得,,,A B C D 的坐标,进而根据对称性得()()3,,2,2A t t C t t ,再代入椭圆方程整理得2235b a =,最后求解离心率即可.【详解】解:设(),,P m n PA t =,则()(),,,3A m n t B m n t +-,()(),,5,C m t n D m t n +-,由题知,A B 关于x 轴对称,,C D 关于y 轴对称,所以30n t n t ++-=,50m t m t ++-=,即n t =,2m t =,所以()()3,,2,2C t t A t t ,所以2222222291441t t a b t t a b ⎧+=⎪⎪⎨⎪+=⎪⎩,即22229144a b a b +=+,所以2253a b=,即2235b a =,所以椭圆E的离心率为5e ===.故选:B8.已知0a b >>,1ab =,设2ab x =,2log ()y a b =+,1z a b=+,则log 2x x ,log 2y y ,log 2z z 的大小关系为()A.log 2log 2log 2x y z x y z >>B.log 2log 2log 2y z x y z x >>C.log 2log 2log 2x z y x z y >>D.log 2log 2log 2y x z y x z>>【正确答案】B【分析】由已知0a b >>,1ab =,可得1=a b,且a >1>b >0,不难判断x ,y ,z 的大小关系01x y z <<<<,再根据对数运算法则及对数函数性质可得大小关系.【详解】∵a >b >0,1ab =,∴可得1=a b ,且a >1>b >0,∴11222a ab x a ==<⋅,222log ()log log 21y a b =+>==,122z a a a a b=+=+=>,又()()22log (1)z y a a b f a a -=-+=>,()120f a a b'=-+>,()f a 单调递增,()()212log (1)0f a f b =-+>>,∴z y ->0,∴01x y z <<<<,∵log 2=log 21x x x +,log 2log 21y y y =+,log 2=log 2+1z z z ,根据对数函数性质可得log 2log 2log 2x z y <<,∴log 2log 2log 2y z x y z x >>.故选B .本题考查对数函数的性质及运算定律,涉及基本不等式和不等式性质的应用,属于综合题.二、多项选择题:本题共4小题,每小题5分,共20分.在每小题给出的四个选项中,有多项符合题目要求,全部选对的得5分,部分选对的得2分,有选错的得0分.9.在9x⎛+ ⎝的展开式中,下列结论正确的是()A.第6项和第7项的二项式系数相等B.奇数项的二项式系数和为256C.常数项为84D.有理项有2项【正确答案】BC【分析】根据二项式展开式的特征,即可结合选项逐一求解.【详解】9x⎛⎝的展开式中共有10项,由二项式系数的性质可得展开式中的第5项和第6项的二项式系数相等,故A 错误;由已知可得二项式系数之和为92,且展开式中奇数项的二项式系数和与偶数项的二项式系数和相等,所以奇数项的二项式系数和为82256=,故B 正确;展开式的通项为139922199C C ,09,N rr r r rr T x x x r r ---+⎛⎫==≤≤∈ ⎪⎝⎭,令3902r -=,解得6r =.故常数项为6399C C 84==,故C 正确;有理项中x 的指数为整数,故0r =,2,4,6,8,故有理项有5项,故D 错误.故选:BC10.下列说法正确的是()A.若直线a 不平行于平面α,a α⊄,则α内不存在与a 平行的直线B.若一个平面α内两条不平行的直线都平行于另一个平面β,则αβ∥C.设l ,m ,n 为直线,m ,n 在平面α内,则“lα⊥”是“l m ⊥且l n ⊥”的充要条件D.若平面α⊥平面1α,平面β⊥平面1β,则平面α与平面β所成的二面角和平面1α与平面1β所成的二面角相等或互补【正确答案】AB【分析】对于选项ABC ,可根据线面平行的判定定理,面面平行的判定定理和线面垂直的判定定理进行判定;对于选项D ,可在长方体中寻找特殊平面进行排除.【详解】选项A ,若存在直线,则由直线和平面平行的判定定理知直线a 与平面α平行,与条件相矛盾,故选项A 正确;选项B ,由面面平行的判定定理可知选项B 正确;选项C ,当直线,m n 不相交时,由线面垂直的判定定理知:l m ⊥且l n ⊥时,得不到l α⊥,故选项C 错误;选项D ,当11//αβ,αβ⊥时,可满足题设条件,此时平面α与平面β所成的二面角为90︒,平面1α与平面1β所成的二面角为0︒,故选项D 错误.故选:AB11.定义在R 上的函数()()π2sin N 3f x x ωω*⎛⎫=+∈ ⎪⎝⎭满足在区间ππ,66⎛⎫- ⎪⎝⎭内恰有两个零点和一个极值点,则下列说法不正确...的是()A.()f x 的最小正周期为π2B.将()f x 的图象向右平移π3个单位长度后关于原点对称C.()f x 图象的一个对称中心为π,06⎛⎫ ⎪⎝⎭D.()f x 在区间π,06⎛⎫- ⎪⎝⎭上单调递增【正确答案】ABC【分析】根据题意可求出ω的值,从而可得到()f x 的解析式,再根据解析式逐项分析即可.【详解】依题可知π23T T <<,于是36ω<<,于是πππ0263ππ3ππ632ωω⎧-≤-+<⎪⎪⎨⎪<+≤⎪⎩,∴45ω<≤,又N ω*∈,∴5ω=,∴()π2sin 53f x x ⎛⎫=+ ⎪⎝⎭,对于A ,由2π2π==5T ω,则()f x 的最小正周期为25π,故A 错误;对于B ,因为ππ4π4π2π2sin 52sin 52sin 52π2sin 533333x x x x ⎡⎤⎛⎫⎛⎫⎛⎫⎛⎫-+=-=-+=+ ⎪ ⎪ ⎪ ⎪⎢⎥⎝⎭⎝⎭⎝⎭⎝⎭⎣⎦,所以将()f x 的图象向右平移π3个单位长度后得()2π2sin 53g x x ⎛⎫=+ ⎪⎝⎭,则()2π02sin 3g ⎛⎫== ⎪⎝⎭,所以()g x 不关于原点对称,故B 错误;对于C ,由π7π2sin 166f ⎛⎫⎛⎫==- ⎪ ⎪⎝⎭⎝⎭,所以π,06⎛⎫ ⎪⎝⎭不是()f x 图象的一个对称中心,故C 错误;对于D ,由π,06x ⎛⎫∈- ⎪⎝⎭,则πππ5,323x ⎛⎫+∈- ⎪⎝⎭,所以()f x 在区间π,06⎛⎫- ⎪⎝⎭上单调递增,故D 正确.故选:ABC .12.平面内到两定点距离之积为常数的点的轨迹称为卡西尼卵形线,它是1675年卡西尼在研究土星及其卫星的运行规律时发现的,已知在平面直角坐标系xOy 中,(2,0)M -,(2,0)N ,动点P 满足||||5PM PN ⋅=,则下列结论正确的是()A.点P 的横坐标的取值范围是⎡⎣B.OP 的取值范围是[]1,3C.PMN 面积的最大值为52D.PM PN +的取值范围是⎡⎤⎣⎦【正确答案】BC【分析】设出点P 的坐标,列出方程并化简整理,放缩解不等式判断A ;利用几何意义并结合求函数值域判断B ;利用三角形面积公式计算判断C ;取点计算判断D 作答.【详解】设点(,)P x y ,依题意,2222[(2)][(2)]25x y x y ++-+=,对于A ,2222222225[(2)][(2)](2)(2)(4)x y x y x x x =++-+≥+-=-,当且仅当0y =时取等号,解不等式22(4)25x -≤得:33x -≤≤,即点P 的横坐标的取值范围是[3,3]-,A 错误;对于B ,2222[(4)4][(4)4]25x y x x y x +++++-=,则224x y ++=显然209x ≤≤,因此||[1,3]OP ==,B 正确;对于C ,PMN 的面积115||||sin ||||222S PM PN MPN PM PN =∠≤=,当且仅当90MPN ∠= 时取等号,当90MPN ∠= 时,点P 在以线段MN 为直径的圆224x y +=上,由222244x y x y ⎧+=⎪⎨++=⎪⎩解得39454x y ⎧=±⎪⎪⎨⎪=±⎪⎩,所以PMN 面积的最大值为52,C 正确;对于D ,因为点(3,0)在动点P 的轨迹上,当点P 为此点时,516PM PN +=+=,D 错误.故选:BC易错点睛:求解轨迹方程问题,设出动点坐标,根据条件求列出方程,再化简整理求解,还应特别注意:补上在轨迹上而坐标不是方程解的点,剔出不在轨迹上而坐标是方程解的点.三、填空题:本题共4小题,每小题5分,共20分.13.已知()()()()1,2,3,4,2,2,3,5A B C D --,则AB 在CD上的投影为______.【正确答案】2105【分析】先求AB ,CD,再求AB ,CD ,AB CD ⋅ ,利用向量夹角余弦公式求夹角,再由投影向量的模长公式求解.【详解】因为()()()()1,2,3,4,2,2,3,5A B C D --,所以()2,2AB =,()1,3CD =- ,所以AB ==,CD == ,264AB CD ⋅=-+= ,设向量AB 与CD 的夹角为θ,5cos 5|||AB CD AB CD θ⋅===,那么AB 在CD上的投影为5210cos 55AB θ==|故答案为.514.已知圆柱的两个底面的圆周都在表面积为20π的球面上,则该圆柱的侧面积的最大值为__________.【正确答案】10π【分析】先求出半径,根据条件列出圆柱底面半径和母线的关系,即可得到侧面积表达式,然后用基本不等式即可求解最大值.【详解】解:设球的半径为R ,圆柱的底面半径为r ,母线为l ,由题意可知,24π20πR R =⇒=,又圆柱的两个底面的圆周都在球面上,则满足22252l r R ⎛⎫+== ⎪⎝⎭,而圆柱的侧面积2πS rl =,0l >,因为22222l l r r lr ⎛⎫+≥⋅= ⎪⎝⎭,当且仅当2l r =,即102r =,l =时等号成立,所以5lr ≤,2π10πS rl =≤,故10π15.已知实数a b c d ,,,成等比数列,且函数()ln 2y x x =+-,当x b =时取到极大值c ,则ad 等于______.【正确答案】1-【分析】通过导函数,求出极值,再利用等比数列的性质,即可求解.【详解】令()()ln 2f x x x =+-,则函数()()ln 2f x x x =+-的定义域为()2,-+∞,导函数11()122x f x x x --'=-=++,当()2,1x ∈--时,()0f x '>,函数()f x 在()2,1--上单调递增,当()1,x ∈-+∞时,()0f x '<,函数()f x 在()1,-+∞上单调递减,所以当=1x -时,函数()ln 2y x x =+-取极大值,极大值为1,所以1,1b c =-=,故bc 1=-,又a b c d ,,,成等比数列,所以1ad bc ==-,故答案为.1-16.如图为一个开关阵列,每个开关只有“开”和“关”两种状态,按其中一个开关1次,将导致自身和所有相邻(上、下相邻或左、右相邻)的开关改变状态.若从这十六个开关中随机选两个不同的开关先后各按1次(例如:先按()1,1,再按()4,4),则()2,3和()4,1的最终状态都未发生改变的概率为______.()1,1()1,2()1,3()1,4()2,1()2,2()2,3()2,4()3,1()3,2()3,3()3,4()4,1()4,2()4,3()4,4【正确答案】41120【分析】根据开关阵列的性质,结合古典概型的概率公式进行求解即可.【详解】要使得()2,3的状态发生改变,则需要按()1,3,()2,2,()2,3,()2,4,()3,3这五个开关中的一个,要使得()4,1的状态发生改变,则需要按()3,1,()4,1,()4,2这三个开关中的一个,所以要使得()2,3和()4,1的最终状态都未发生改变,则需按其他八个开关中的两个或()1,3,()2,2,()2,3,()2,4,()3,3中的两个或()3,1,()4,1,()4,2中的两个,故所求概率为222853216A A A 41A 120++=.故41120关键点睛:根据开关阵列的判断出:要使得()2,3和()4,1的最终状态都未发生改变,则需按其他八个开关中的两个或()1,3,()2,2,()2,3,()2,4,()3,3中的两个或()3,1,()4,1,()4,2中的两个,是解题的关键.四、解答题:共70分.解答应写出文字说明,证明过程或演算步骤.17.已知{}n a 为等差数列,且11a =,()6423a a a =-.(1)求数列{}n a 的通项公式;(2)若数列{}n b 满足:()*12na nb n ⎛⎫=∈ ⎪⎝⎭N ,{}n b 的前n 项和为n S ,求127128n S ≤成立的n 的最大值.【正确答案】(1)n a n =(2)7【分析】(1)代入公式求出公差即可求通项公式;(2)代入等比数列的前n 项和公式即可.【小问1详解】设数列{}n a 的公差为:d ,()6423a a a =-,11a =∴()111533a d a d a d +=+--,∴1d =.∴()1111n a a n d n n =+-=+-=,即n a n =.【小问2详解】()*12na nb n ⎛⎫=∈ ⎪⎝⎭N ,nan =,∴12nn b ⎛⎫= ⎪⎝⎭,∴数列{}n b 为等比数列,所以11112211212n n nS ⎛⎫- ⎪⎝⎭==--由127128nS ≤,即112712128n -≤,化简得:111282n ≤,解得17n ≤≤,()*n ∈N ,所以,要使127128nS ≤成立的n 的最大值为:7.18.已知函数()()sin 0,π2,0f x M x M ϕωϕω⎛⎫>>⎭<⎪⎝=+)的部分图象如图所示.(1)求函数()f x 的解析式;(2)在ABC 中,角,,A B C 的对边分别是,,a b c ,若()2cos cos a c B b C -=,求2f A ⎛⎫ ⎪⎝⎭的取值范围.【正确答案】(1)()π26f x x ⎛⎫=+⎪⎝⎭;(2)1,12⎛⎤⎥⎝⎦.【分析】(1)利用最大值和最小值,求出M ,通过函数的周期求出ω,由经过π,16⎛⎫⎪⎝⎭,求出φ,即可求出()f x 的解析式;(2)利用()2cos cos a c B b C -=,结合正弦定理,求出cos B ,利用函数的解析式2f A ⎛⎫ ⎪⎝⎭的表达式,通过A 的范围求出函数的取值范围.【小问1详解】由图象知函数()f x 的最大值为1,最小值为1-,所以1M =由图象知函数()f x 的周期5ππ4π126T ⎛⎫=-=⎪⎝⎭,所以ω2=,将点π,16⎛⎫⎪⎝⎭代入解析式得πsin φ13⎛⎫+= ⎪⎝⎭,因为πφ2<,所以πφ6=,所以()π26f x x ⎛⎫=+ ⎪⎝⎭.【小问2详解】由()2cos cos a c B b C -=得:()2sin sin cos sin cos A C B B C -=,所以()2sin cos sin A B B C =+,2sin cos sin A B A =,因为()0,πA ∈,所以sin 0A ≠,所以1cos 2B =,π3B =,2π3A C +=,由(1)πsin 26A f A ⎛⎫⎛⎫=+⎪ ⎪⎝⎭⎝⎭,又2π03A <<,ππ5π666A <+<,所以π1sin 62A ⎛⎫⎛⎤+∈ ⎪ ⎥⎝⎭⎝⎦,所以1,122A f ⎛⎫⎛⎤∈⎪ ⎥⎝⎭⎝⎦.所以2f A ⎛⎫⎪⎝⎭的取值范围为1,12⎛⎤⎥⎝⎦.19.如图,已知多面体EABCDF 的底面ABCD 是边长为2的正方形,EA ⊥底面ABCD ,//FD EA ,且112FD EA ==.(1)记线段BC 的中点为K ,在平面ABCD 内过点K 作一条直线与平面ECF 平行,要求保留作图痕迹,但不要求证明;(2)求直线EB 与平面ECF 所成角的正弦值.【正确答案】(1)答案见解析(2)6【分析】(1)根据线面平行性质定理,可得所作直线必平行面ABCD 与面ECF 的交线,因此先作两平面交线,再在平面ABCD 内作交线的平行线.(2)建立空间直角坐标系,求直线EB 的方向向量和平面ECF 的法向量,利用向量夹角公式求直线EB 与平面ECF 所成角的正弦值.【小问1详解】延长,AD EF ,设其交点为N ,连接CN ,则CN 为平面ABCD 与平面ECF 的交线,取线段CD 的中点M ,连接KM ,直线KM 即为所求.证明如下:延长,AD EF ,设其交点为N ,连接CN ,则CN 为平面ABCD 与平面ECF 的交线,因为//FD EA ,所以FDA EAN ∽,又12FD EA =,所以12ND NA =,所以ND DA BC ==,又//ND BC ,所以四边形BCND 为平行四边形,所以//CN BD ,取CD 的中点M ,连接KM ,∵,K M 分别为,BC CD 的中点,∴//KM BD ,∴//KM CN .∵CN ⊂平面EFC ,KM ⊄平面EFC ,∴//KM 平面EFC.【小问2详解】以点A 为原点,AB 所在的直线为x 轴,AD 所在的直线为y 轴,建立空间直角坐标系,如图.由已知可得()()()()()0,0,0,0,0,2,2,0,0,2,2,0,0,2,1A E B C F ,所以()()()2,2,2,2,0,2,0,2,1EC EB EF =-=-=-,设平面ECF 的法向量为(,,)n x y z =,则0,0.n EC n EF ⎧⋅=⎪⎨⋅=⎪⎩得020x y z y z +-=⎧⎨-=⎩,取1y =得,1,2x z ==,平面ECF 的一个法向量(1,1,2)n =.设直线EB 与平面ECF 所成的角为θ,则3sin cos ,6E EB n E B B n nθ⋅====⋅.所以直线EB 与平面ECF所成角的正弦值为6.20.放行准点率是衡量机场运行效率和服务质量的重要指标之一.某机场自2012年起采取相关策略优化各个服务环节,运行效率不断提升.以下是根据近10年年份数i x 与该机场飞往A 地航班放行准点率i y (1210i =L ,,,)(单位:百分比)的统计数据所作的散点图及经过初步处理后得到的一些统计量的值.xyt1021ii x=∑101iii x y=∑1021ii t=∑101iii t y=∑2017.580.4 1.5.0.227.71226.8其中()ln 2012i i t x =-,101110i i t t ==∑(1)根据散点图判断,y bx a =+与()ln 2012y c x d =-+哪一个适宜作为该机场飞往A 地航班放行准点率y 关于年份数x 的经验回归方程类型(给出判断即可,不必说明理由),并根据表中数据建立经验回归方程,由此预测2023年该机场飞往A 地的航班放行准点率.(2)已知2023年该机场飞往A 地、B 地和其他地区的航班比例分别为0.2、0.2和0.6.若以(1)中的预测值作为2023年该机场飞往A 地航班放行准点率的估计值,且2023年该机场飞往B 地及其他地区(不包含A 、B 两地)航班放行准点率的估计值分别为80%和75%,试解决以下问题:(i )现从2023年在该机场起飞的航班中随机抽取一个,求该航班准点放行的概率;(ii )若2023年某航班在该机场准点放行,判断该航班飞往A 地、B 地、其他地区等三种情况中的哪种情况的可能性最大,说明你的理由.附:(1)对于一组数据()11,u v ,()22,u v ,…,(),n n u v ,其回归直线v u αβ=+的斜率和截距的最小二乘估计分别为()()()112211ˆnni ii i i i n ni ii i u u vv u vnu v u u unu β====---⋅==--∑∑∑∑,ˆˆv u αβ=-参考数据:ln10 2.30≈,ln11 2.40≈,ln12 2.48≈.【正确答案】(1)()ln 2012y c x d =-+适宜,预测2023年该机场飞往A 地的航班放行准点率84%(2)(i )0.778;(ii )可判断该航班飞往其他地区的可能性最大,理由见解析【分析】(1)根据线性回归方程的计算公式,选择合适的模型计算即可;(2)利用全概率公式和条件概率公式,即可根据概率判断可能性最大的情况.【小问1详解】由散点图判断()ln 2012y c x d =-+适宜作为该机场飞往A 地航班放行准点率y 关于年份数x 的经验回归方程类型.令()ln 2012t x =-,先建立y 关于t 的线性回归方程.由于101102212101226.8101.580.4ˆ427.7101.510i iii i t y t yctt =--=--⨯⨯===-⨯-∑∑,ˆˆ804415744...dy ct =-=-⨯=,该机场飞往A 地航班放行准点率y 关于t 的线性回归方程为ˆ4744.yt =+,因此y 关于年份数x 的回归方程为()ˆ4ln 201274.4yx =-+所以当2023x =时,该机场飞往A 地航班放行准点率y 的预报值为()ˆ4ln 202320127444ln11744424074484....y=-+=+≈⨯+=.所以2023年该机场飞往A 地航班放行准点率y 的预报值为84%.【小问2详解】设1A =“该航班飞往A 地”,2A =“该航班飞往B 地”,3A =“该航班飞往其他地区”,C =“该航班准点放行”,则()10.2P A =,()20.2P A =,()30.6P A =,()10.84P C A =,()20.8P C A =,()30.75P C A =.(i )由全概率公式得,()()()()()()()112232P C P A P C A P A P C A P A P C A =++0.840.20.80.20.750.60.778=⨯+⨯+⨯=,所以该航班准点放行的概率为0.778.(ii )()()()()()()11110.20.840.778P A P C A P A C P A C P C P C ⨯===,()()()()()()22220.20.80.778P A P C A P A C P A C P C P C ⨯===,()()()()()()33330.60.750.778P A P C A P A C P A C P C ⨯===,因为0.60.750.20.840.20.8⨯>⨯>⨯,所以可判断该航班飞往其他地区的可能性最大.21.已知双曲线C :()22221,0x y a b a b-=>,直线1l :2y x =+线C 仅有一个公共点.(1)求双曲线C 的方程(2)设双曲线C 的左顶点为A ,直线2l 平行于1l ,且交双曲线C 于M ,N 两点,求证:AMN 的垂心在双曲线C 上.【正确答案】(1)2211616x y -=(2)证明见解析【分析】(1可得a b =,再联立直线与双曲线利用判别式可得C 的方程;(2)设2l 方程,及M N ,的坐标,由过A 引MN 的垂线交C 于另一点H ,可得点H 为2016,33⎛⎫- ⎪⎝⎭.再证AN MH ⊥即可.【小问1详解】因为双曲线C 2222a b a+=,即22a b =,所以双曲线C 的方程为222x y a -=,联立直线1l 与双曲线C 的方程2222y x x y a⎧=+⎪⎨-=⎪⎩,消去y 得(2222x x a -+=,即))2216480a +++=,因为1l 与双曲线C 仅有一个公共点,所以()22164480a ∆=-+=,解得216a =,故双曲线C 的方程为2211616x y -=.【小问2详解】设(2:2l y x m m =+≠,()11,M x y ,()22,N x y 则M N 、满足222,16,y x m x y =+⎧⎨-=⎩消去y 得2234160x mx m +++=,所以1243x x m +=-,212163m x x +=,如图所示,过A 引MN 的垂线交C 于另一点H ,则AH 的方程为122y x =--.代入2216x y -=得238800x x --=,即4x =-(舍去)或203x =.所以点H 为2016,33⎛⎫-⎪⎝⎭.所以()()()()()()21122122116322162320320443AN MHy y x m x m x m k k x x x x ⎛⎫+ ⎪++++⎝⎭==-+⎛⎫+- ⎪⎝⎭()()()2222212122212122241683163212632316312328016163280m m m m x x x m x x x m m x x x x x m m x +-++++++++==++--+---,22221632611632644m m x m m x -++==----+所以MH AN ⊥,故H 为AMN 的垂心,得证.关键点睛:本题考察直线与圆锥曲线的位置关系,属于压轴题.先求AMN 一条垂线与双曲线的交点H ,再证另两条过交点H 的直线互相垂直,由此得证,其中化简斜率关系是关键,用到了转化及整体消元的思想.22.已知()21ln 22f x a x x x =+-(R a ∈且0a ≠),()cos sin g x x x x =+.(1)求()g x 在[],ππ-上的最小值;(2)如果对任意的[]1,x ππ∈-,存在21,x e e ⎡⎤∈⎢⎥⎣⎦,使得()()212f x ag x x -≤成立,求实数a 的取值范围.【正确答案】(1)-1(2)()1,00,2⎡⎫-+∞⎪⎢⎣⎭【分析】(1)对()g x 求导,因为()g x 为偶函数,求出()g x 在()0,x π∈的单调性,即可求出[],ππ-上的最小值;(2)由(1)知,()g x 在[],ππ-上的最小值为1-,所以21,x e e⎡⎤∃∈⎢⎥⎣⎦,使得()221f x a x --≤成立,即()222221ln 2a x x x x --≥成立,即2222212ln x x a x x --≥,设()212ln x xx x xϕ-=-,1,x e e ⎡⎤∈⎢⎥⎣⎦,即只需()min a x ϕ≥即可.【小问1详解】()sin sin cos cos g x x x x x x x '=-++=,显然()g x 为偶函数,当0x >时,0,2x π⎛⎫∈ ⎪⎝⎭时,cos 0x x >,()0g x '>,∴()g x 在0,2π⎛⎫ ⎪⎝⎭单调递增;,2x ππ⎛⎫∈ ⎪⎝⎭时,cos 0x x <,()0g x '<,∴()g x 在,2ππ⎛⎫⎪⎝⎭单调递减;()01g =,22g ππ⎛⎫= ⎪⎝⎭,()1g π=-,∴()g x 在()0,π上的最小值为1-.由偶函数图象的对称性可知()g x 在(),ππ-上的最小值为1-.【小问2详解】先证ln 1≤-x x ,设()ln 1h x x x =-+,则()111x h x x x-'=-=,令()001h x x '>⇒<<,令()01h x x '⇒,∴()h x 在()0,1上单调递增,在()1,+∞上单调递减.()()10h x h ≤=故ln 1≤-x x ①恒成立.由题意可得21,x e e ⎡⎤∃∈⎢⎥⎣⎦,使得()221f x a x --≤成立,即()222221ln 2a x x x x --≥成立.由①可知22ln 10x x ->≥,参变分离得2222212ln x x a x x --≥,设()212ln x x x x xϕ-=-,1,x e e ⎡⎤∈⎢⎥⎣⎦,即只需()min a x ϕ≥即可.()()()()()()2221111ln 1ln 122'ln ln x x x x x x x x x x x x x x x ϕ-⎛⎫⎛⎫----⋅--+ ⎪ ⎪⎝⎭⎝⎭==--由①知ln 1≤-x x 得ln 1x x -≥-,∴1114ln 111202222xx x x x x --++-+=-=>≥令()'01x x e ϕ>⇒<<,令()1'01x x eϕ<⇒<<,∴()x ϕ在1,1e ⎛⎫ ⎪⎝⎭上单调递减,在()1,e 上单调递增.∴()()min 112x ϕϕ==-,∴12a ≥-,又已知0a ≠故a 的取值范围为()1,00,2⎡⎫-+∞⎪⎢⎣⎭.。
(完整版)数据库模拟试题3(含答案)
模拟试题3一.单项选择题(本大题共10小题,每小题2分,共20分)1.在数据库方式下的信息处理中,占据中心位置的是 [ ]A .数据B .程序C .软件D .磁盘2.设R 和S 都是二元关系,那么与元组演算表达式{ t | R (t )∧ ( u) (S(u) ∧ u[1]≠ t[2])}不等价的关系代数表达式是 [ ]A .π1,2(σ2≠3(R ×S ))B .π1,2(σ2≠1(R ×S ))C .π1,2(R ⋈S )D .π3,4(σ1≠4(S ×R ))3.设有规则: W (a,b,c,d )← R (a,b,x )∧ S (c,d,y )∧ x>y 与上述规则头部等价的关系表达式是 [ ]A .π1,2,4,5(σ3>6(R ⋈S ))B .π1,2,4,5(σ3>3(R ×S ))C .π1,2,4,5(R ⋈ S )D .π1,2,4,5(R ⋈ R )4.SQL 中,聚合函数COUNT (列名)用于 [ ] A .计算元组个数 B .计算属性的个数C .对一列中的非空值计算个数D .对一列中的非空值和空值计算个数5.设有关系R (A ,B ,C )的值如下:A B C2 2 32 3 43 3 5下列叙述正确的是 [ ]A .函数依赖A →B 在上述关系中成立 B .函数依赖BC →A 在上述关系中成立C .函数依赖B →A 在上述关系中成立D .函数依赖A →BC 在上述关系中成立6.设关系模式R (A ,B ,C ,D ),F 是R 上成立的FD 集,F={ AB →C ,D →B },那么 ρ={ ACD ,BD }相对于F [ ]A .是无损联接分解,也是保持FD 的分解B .是无损联接分解,但不保持FD 的分解C .不是无损联接分解,但保持FD 的分解D .既不是无损联接分解,也不保持FD 的分解7.在有关“弱实体”的叙述中,不正确的是 [ ]A .弱实体的存在以父实体的存在为前提B .弱实体依赖于父实体的存在C .父实体与弱实体的联系可以是1:1、1:N 或M:ND .父实体与弱实体的联系只能是1:1或1:N8.如果有n 个事务串行调度,那么不同的有效调度有 [ ]A .n 2B .2nC .4nD .n !9.在传统SQL 技术中,使用“ORDER BY ”子句的SELECT 语句查询的结果,实际上为 [ ]2≠13>33>6A.数组 B.列表 C.包 D.集合10.在DDBS中,用户或应用程序应当了解分片情况,但不必了解片段的存储场地,这种透明性称为[ ] A.分片透明性 B.局部数据模型透明性 C.片段透明性 D.位置透明性二.填空题(本大题共10小题,每小题1分,共10分)11.DBS具有较高的数据独立性,其原因是______________________。
期末仿真模拟试题(三)+2022-2023学年部编版语文八年级上册
2.阅读下面语句,按要求答题。(8分)
①为了达到这个目的,他们讲究亭台xuān( )榭的布局,讲究假山池沼的配合,讲究花草树木的映衬,讲究近景远景的层次。(叶圣陶《苏州园林》)
材料二:
我们遵照前人的经验,卧床假寐,静待五更。当表针一指到四点的时候,我们就赶忙起床。走出门外,当 真听见了此落彼起的报晓鸡鸣。晨寒凛冽,我们踏着如霜似雪的月光走上了卢沟桥。这时,接近满圆的晓月转 到了西天,正悬挂在迎面的卢师山上。抬头望月,看得出这时的月与桥的距离是最近的:晓月的亮度比初升和 正处中天时,都大得多。这时的晓月是在桥的北侧.永定河的上游,月光顺流而下,视野也显得最为深远。我 们在桥上有意地测试了一下晓月的亮度。凭借着月光,不仅看得清碑身上乾隆书写的“卢沟晓月"四个大字, 也依稀地辨认出了在桥西碑亭上康熙书写的“察永定河”的一首五言律诗。桥下的永定河,因为大旱缺水,我 们虽然没能见到波涛浩渺的壮丽场景,但汩汩有声的淙涼细流,在晓月映照下,也呈现出波光粼粼的景色。这 时,看到披着晓月银光的卢沟桥,直至每个玉石栏、柱、栏板,以及485个大小石狮……我们禁不住想起曾在 元代做官多年的马可•波罗的描述:“这是一座无可比拟的、世界上最美的桥。”
——选自《周亚夫军细柳》
【注】①行在:皇帝出行所在的地方。
8.解释下列加点词在文中的意思。(4分)
①与众谋曰( ) ②径趋金营( )
③居无何( ) ④改容式车( )
9.与例句中的“以”用法不相同的一项是()(2分)
2023国考公务员考试《行测判断推理题》全真模拟试题(三)含解析
2023国考公务员考试《行测判断推理题》全真模拟试题(三)一、类比推理练习题(一)1.春风得意:闭月羞花()A.一发千钧:三顾茅庐B.风木含悲:百花争艳C.怒发冲冠:巧舌如簧D.一日三秋:大彻大悟2.院士:学者()A.画家:艺术家B.研究员:青年C.明星:艺术家D.专家:教授3.赠送:收受()A.制定:实施B.制造:化解C.给予:享有D.向往:憧憬4.面粉:增白剂()A.白酒:塑化剂B.果汁:色素C.大豆:转基因D.饮料:添加剂5.北京:故宫()A.唐山:曹妃甸B.泰山:迎客松C.庐山:仙人洞D.乐山:大佛6.封面∶书本()A.政治∶统治B.宗教∶上层建筑C.雇员∶工厂D.毛笔∶宣纸7.( ) 对于计算机相当于大脑对于 ( )A.网络身体B.鼠标小脑C.CPU 人体D.显示器脑干8.台灯:照明()A.汽车:奔驰B.筷子:夹菜C.鸟儿:飞翔D.手表:电池9.银元:白银:货币()A.竹筏:竹子:木舟B.瓦片:泥土:屋顶C.琵琶:木材:弦乐【参考答案与解析】1.【答案】D解析:春风得意和一日三秋都是主谓式成语;闭月羞花和大彻大悟都是联合式成语,D项正确。
2.【答案】A解析:包含关系,院士都是学者,画家都是艺术家,A项正确。
3.【答案】C解析:一个事件的双方:赠送方与收受方;C项也符合此关系。
4.【答案】A解析:面粉中添加增白剂和白酒中添加塑化剂都是食品安全问题。
5.【答案】D解析:第一步:判断题干词语间逻辑关系故宫是北京市的著名景点之一,且故宫是人工建造的。
题干两词间构成著名景点与其所在城市的对应关系。
第二步:判断选项词语间逻辑关系D项,大佛是乐山市的著名景点之一,且大佛也是人工建造的,符合题干逻辑。
A、B、C三项中,景点和所在地都能对应上,但“曹妃甸”、“迎客松”和“仙人洞”都不是人工建造的景点,与题干逻辑不符。
故正确答案选D。
6.【答案】B解析: 封面是书本的重要组成部分,宗教是上层建筑的一部分,故选B项。
2024年云南省初中语文学业水平考试模拟试题(三)
2024年云南省初中语文学业水平考试模拟试题(三)(满分:100分考试时间:150分钟)一、积累与运用(1~5题,每题2分,第6题6分。
共16分)阅读下面文字,按要求完成1~4题。
(A)读厚一本书,要下笨功夫,要有“学海无涯苦作舟”的精神与劲(jìng)头。
在知识与信息让人眼花缭(liáo)乱、应接不瑕....的时代,如何我们日益下降的阅读率,我们认识世界、反思自我的能力,美国埃默里大学教授马克·鲍尔莱恩在《最愚蠢的一代》书中提醒,把时间都花在社交网络、埋头于手机的年轻人,还得保留一个“与历史、与艺术、与公民理念相遇”的生命空间。
不可否认,技术的发展为知识的获取提供了便利,但我们还是应该放下手机多读书,而不是于网络化的浅阅读。
我们要学习知识,特别是系统学习一种理论和专业知识,研究某一领域的问题,唯有老老实实地捧起书本啃,方能形成系统的思维和独到的见解。
(B)读厚一本书,最重要的是要多读。
一个人的阅读史决定着他的精神长相。
一个热爱阅读的人,心中自有丘壑..,眼里必有远方,这些东西是长年累月的阅读所带来的。
作家三毛说:“(C)读书多了,容颜自然改变,在气质里,在谈吐上,在胸襟(.jīn).里,当然也可能显露在生活和文字里。
”总有人抱怨现在这么忙,哪还有时间读书?其实,没有时间看书的人恰恰是那些有时间也不会看书的人,最终只会落得个“少壮不努力,老大徒伤悲”的慨叹..。
读厚一本书,要敢于走出舒适区,读自己不感兴趣的书——(D)读理论书籍、读难读的书,发扬钉钉子,深掘一口井,不挖到钻石誓不罢休,真正把一本书读懂读透。
要相信“做难事必有所得”,而不是浅尝辄止....、,老是在低层次徘徊(.huái).而不自知。
1.文中注音不正确的一项是()A.劲(jìng)B.缭(liáo)C.襟(jīn)D.徊(huái)2.文中加点词语有错别字的一项是()A.应接不瑕B.丘壑C.慨叹D.浅尝辄止3.文中横线上应填入的词语,最恰当的一项是()A.救济改善沉醉功亏一篑B.救济提高沉湎半途而废C.拯救改善沉醉功亏一篑D.拯救提高沉湎半途而废4.文中句子有语病的一项是()A.读厚一本书,要下笨功夫,要有“学海无涯苦作舟”的精神与劲头。
模拟试题(三)
新安职高2013年高考全真模拟试题(三)(机械基础)部分(130分)一、选择题(每小题3分,共30分。
每小题中只有一个选项是正确的,请将正确选项的序号填在题后的括号内)1.自行车车胎与地面的接触属于( )摩擦A.滑动B.滚动C.滚滑动D.动态2.碳在其中以团絮状石墨形式存在的铸铁是()A.灰铸铁B.可锻铸铁C.球墨铸铁D.白口铸铁3.能实现间歇运动的机构是()A.齿轮机构B.棘轮机构C.凸轮机构D.曲柄摇杆机构4.下列()属于“螺母作直线移动,蜗杆作回转运动”的应用形式A.螺旋千斤顶B台虎钳 C.活动扳手 D.螺旋压力机5.下列轴承中,可同时承受以径向为主的径向与轴向载荷的是()A.深沟球轴承B.角接触球轴承C.圆锥滚子轴承D.调心球轴承6.某键的标记为“键GB/T 1096-2003 C12x8x110则该键的有效长度为()mmA.104B.102C.116D.1107.常用的有机玻璃属于( )的一种A.塑料B.陶瓷C.复合材料D.橡胶8.下列联轴器中具有缓冲吸震的是()A.套筒联轴器B.齿式联轴器C.弹性套柱销联轴器D.弹性柱销联轴器9.深沟球轴承宽度系列为1,直径系列为2.内径为15mm,其代号是()A.61245B.61203C.61215D.6120210.具有结构简单,定位可靠且承受较大的轴向力的轴向固定形式是()A.圆锥销B圆锥面C弹性垫圈D轴肩、轴环二、判断题:(每小题2分,共20分。
正确的,在题后括号内打“√”,错误的打“×”)11.滑动摩擦力定大于滚动摩擦力()12.约束反力的方向与约束对物体限制其运动的方向相反()13.采用空心轴能够有效地提高轴的抗扭能力()14.中碳钢的可焊性优于低碳钢,比高碳钢差()15.为改善切削性能,低碳钢课采用正火处理()16.一对能正确啮合的渐开线直齿圆柱齿轮传动,其啮合角一定为20°。
()17.滚子链的滚子与套筒,套筒与链板采用间隙配合()18.反向双曲柄机构的两曲柄旋转方向相反,但角速度相等()19.刚性联轴器能补偿两轴间的相对位移()20.阶梯轴的轴径要求中间直径大,两端直径小()21.在相同的张紧力下,V带的传动能力比平带大2倍()22.同一台机器中的几根传动轴中由于低速轴承受的转矩较小,因此低速轴的直径较大.()23.在材料相同,载荷相同的条件下,空心轴比实心轴省料. ( )24.对于塑性材料,其极限应力应取8 . ()25.各种机床、电动机、汽车、自行车、电风扇都是机器. ()三、名词解释(9分)26、刚体:27、导程:28、纯弯曲:四、简答(36分)29、简述圆轴扭转时横截面上的应力分布规律(6分)30、部分式滑动轴承的组成、使用特点?(6分)31、梁有哪几种形式?并说明各种形式的特点(6分)32、双曲柄机构由哪几种类型,各自的运动特点是什么?(9分)33、标准直齿圆柱齿轮正确啮合条件是什么?(9分)五、计算题(25分)34、如图所示,水平杆AB,A端为固定铰链支座,C点为AB的中点,并用绳子系于墙上,已知铅垂力P=2KN,a=30°,不计杆重,求绳子的拉力及铰链A的约束反力(10分)35、如图所示的定轴轮系中,1为蜗杆,右旋,Z1=1 ,n1=750r/min,转向如图所示,2为蜗轮,Z2=40,Z3=30,Z4=60,Z5=25,Z6=40,m4=5mm,试求:(1)标准直齿圆柱齿轮3的分度园,齿根圆,齿顶圆直径(6分)(2)轮系传动比i16及齿轮6的转速(6分)(3)在图上标出各轮转向(3分)。
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模拟试题三
一.概念题(每题3分,共5题)
1.资金等值
2.速动比率
3.敏感性因素
4.无形磨损
5.投资利润率
二.简述题(每题6分,共4题)
1.什么是资金时间价值?资金时间价值有哪些表现形式?
2.在现金流量分析中,为什么使用经营成本的而不使用总成本?
3.为什么进行不确定性分析?
4.分析比较传统融资与项目融资的区别。
三.计算题(共4题,共61分)
1. 某项目的现金流量如下所示(I=10%)
单位:万元年末0 1 2 3 4-7 8
净现金流量-50 -500 -100 150 250 320 试计算项目的静态和动态投资回收期。
(9分)
2.一位购房者在2001年12月,以50万元购得一处房产。
他首付30%,其余部分由银行按揭贷款解决。
按揭贷款年限为20年,每年5%的实际利率。
他从2002年12月开始每年偿还银行贷款。
他想知道,在2015年12月,在他刚偿还贷款后,即他将退休时,还欠多少钱?(10分)
3.某项目根据统计分析得到如下关系式:TR=700X-0.03X2,TC=150000+5X+0.02X2,TR、TC分别为销售收入和总成本,X表示产量。
试进行盈亏平衡分析。
(12分)
4. 有三个独立方案A、B和C,各方案的寿命期均为5年。
A方案投资100万元,年净收入60万元;B方案投资220万元,年净收入100万元;C方案投资450万元,年净收入230万元;基准收益率为10%。
若资金限额为500万元,试用互斥组合法求出最优方案组合。
(15分)
5.某公司原有资本总额1000万元,其中债务资本300万元,年利率10%;普通股资本700万元(发行普通股10万股,每股面值70元)。
公司变动成本率为60%,固定成本为200万元,所得税率为33%。
由于扩大业务,需追加筹资630万元,其具体筹资方式有两种:第一,全部增发普通股,需增发新股9万股,每股面值70元;第二,筹措长期债务,债务利率仍为10%。
试分析该公司的资本结构,并画图表示。
(15分)。