模拟试题一答案解析

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e听说模拟试题1答案

e听说模拟试题1答案答案解析：本文将为您提供e听说模拟试题1的答案解析。

一、听力理解本部分共有5个题目，每个题目附有一段录音，您需要通过听力理解的能力来回答相关问题。

1.答案: C解析: 录音中提到了参观博物馆需要花时间进行购票和排队的问题，从中可以推断，选择C项，即“去的时候不用排队买票”。

2.答案: B解析: 录音中提到了在餐馆吃饭时需要注意订单是否正确，从中可以推断，选择B项，即“检查订单是否正确”。

3.答案: A解析: 录音中提到了玛丽想为明天的会议准备报告，从中可以推断，选择A项，即“玛丽在准备明天的会议报告”。

4.答案: B解析: 录音中提到了购买东西时需要提供相关的身份信息，从中可以推断，选择B项，即“出示身份证”。

5.答案: C解析: 录音中提到了派对当天的时间，从中可以推断，选择C项，即“派对将于晚上7点开始”。

二、阅读理解本部分共有5个题目，每个题目附有一篇短文，您需要通过阅读理解的能力来回答相关问题。

1.答案: D解析: 从文章中可以得知，卢先生是一个著名的建筑师，选择D项，即“卢先生是一名建筑师”。

2.答案: A解析: 从文章中可以得知，这是一家新开的购物中心，选择A项，即“这是一家新开的购物中心”。

3.答案: C解析: 从文章中可以得知，高中生可以在这个课外俱乐部学习音乐和绘画，选择C项，即“高中生可以在课外俱乐部学习音乐和绘画”。

4.答案: B解析: 从文章中可以得知，这是一家家具店，选择B项，即“这是一家家具店”。

5.答案: D解析: 从文章中可以得知，购物中心会举办一个庆祝活动，选择D 项，即“购物中心会举办庆祝活动”。

三、口语表达本部分共有5个题目，您需要根据提供的情景和问题给出适当的回答。

1. 答案: Yes, I do.解析: 这是一个询问是否会游泳的问题，回答是肯定的。

2. 答案: It's a pleasure.解析: 这是一个对别人的感谢表示的回答，表达感谢时可以用"It's a pleasure"。

大学英语四级模拟试题一(附含答案解析)

大学英语四级模拟题一Part I Reading Comprehension (Skimming and Scanning) (10%) Directions:In this part, you will have 15 minutes to go over the passage quickly and answer the questions on the Answer Sheet.For questions 1-7, choose the best answer from the four choices marked A, B, C and D. For question 8-10, complete the sentences with the information given in the passage.Media Selection for AdvertisementsAfter determining the target audience for a product or service, advertising agencies must select the appropriate media for the advertisement. We discuss here the major types of media used in advertising. We focus our attention on seven types of advertising: television, newspapers, radio, magazines, out-of-home, Internet, and direct mail.TelevisionTelevision is an attractive medium for advertising because it delivers mass audiences to advertisers. When you consider that nearly three out of four Americans have seen the game show Who Wants to Be a Millionaire? You can understand the power of television to communicate with a large audience. When advertisers create a brand, for example, they want to impress consumers with the brand and its image. Television provides an ideal vehicle for this type of communication. But television is an expensive medium, and not all advertisers can afford to use it.Television’s influence on advertising is fourfold. First, narrowcasting means that television channels are seen by an increasingly narrow segment of the audience. The Golf Channel, for instance, is watched by people who play golf. Home and Garden Television is seen by those interested in household improvement projects. Thus, audiences are smaller and more homogeneous（具有共同特点的）than they have been in the past. Second, there is an increase in the number of television channels available to viewers, and thus, advertisers. This has also resulted in an increase in the sheer number of advertisements to which audiences are exposed. Third, digital recording devices allow audience members more control over which commercials they watch. Fourth, control over programming is being passed from the networks to local cable operators and satellite programmers.NewspapersAfter television, the medium attracting the next largest annual ad revenue is newspapers. The New York Times, which reaches a national audience, accounts for $1 billion in ad revenue annually. It has increased its national circulation（发行量）by 40% and is now available for home delivery in 168 cities. Locally, newspapers are the largest advertising medium.Newspapers are a less expensive advertising medium than television and providea way for advertisers to communicate a longer, more detailed message to their audience than they can through television. Given new production techniques, advertisements can be printed in newspapers in about 48 hours, meaning newspapers are also a quick way of getting the message out. Newspapers are often the most important form of news for a local community, and they develop a high degree of loyalty from local readers.RadioAdvertising on radio continues to grow. Radio is often used in conjunction with outdoor billboards（广告牌）and the Internet to reach even more customers than television. Advertisers are likely to use radio because it is a less expensive medium than television, which means advertisers can afford to repeat their ads often. Internet companies are also turning to radio advertising. Radio provides a way for advertisers to communicate with audience members at all times of the day. Consumers listen to radio on their way to school or work, at work, on the way home, and in the evening hours.Two major changes---satellite and Internet radio---will force radio advertisers to adapt their methods. Both of these radio forms allow listeners to tune in stations that are more distant than the local stations they could receive in the past. As a result, radio will increasingly attract target audiences who live many miles apart.MagazinesNewsweeklies, women’s titles, and business magazines have all seen increases in advertising because they attract the high-end market. Magazines are popular with advertisers because of the narrow market that they deliver. A broadcast medium such as network television attracts all types of audience members, but magazine audiences are more homogeneous. If you read Sports Illustrated, for example, you have much in common with the magazine’s othe r readers. Advertisers see magazines as an efficient way of reaching target audience members.Advertisers using the print media---magazines and newspapers---will need to adapt to two main changes. First, the Internet will bring larger audiences to local newspapers. These audiences will be more diverse and geographically dispersed（分散）than in the past. Second, advertisers will have to understand how to use an increasing number of magazines for their target audiences. Although some magazines will maintain national audiences, a large number of magazines will entertain narrower audiences.Out-of-home advertisingOut-of-home advertising, also called place-based advertising, has become an increasingly effective way of reaching consumers, who are more active than ever before. Many consumers today do not sit at home and watch television. Using billboards, newsstands, and bus shelters for advertising is an effective way of reaching these on-the-go consumers. More consumers travel longer distances to and from work, which also makes out-of-home advertising effective. Technology has changed the nature of the billboard business, making it a more effective medium than in the past. Using digital printing, billboard companies can print a billboard in 2 hours, compared with 6 days previously. This allows advertisers more variety inthe types of messages they create because they can change their messages more quickly.InternetAs consumers become more comfortable with online shopping, advertisers will seek to reach this market. As consumers get more of their news and information from the Internet, the ability of television and radio to get the word out to consumers will decrease. The challenge to Internet advertisers is to create ads that audience members remember.Internet advertising will play a more prominent role in organizations’ advertising in the near future. Internet audiences tend to be quite homogeneous, but small. Advertisers will have to adjust their methods to reach these audiences and will have to adapt their persuasive strategies to the online medium as well.Direct mailA final advertising medium is direct mail, which uses mailings to consumers to communicate a client’s message. Direct mail includes newsletters, postcards and special promotions. Direct mailis an effective way to build relationships with consumers. For many businesses, direct mail is the most effective form of advertising.1. Television is attractive advertising medium in that ________.A. it has large audiencesB. it appeals to housewivesC. it helps build up a company’s reputationD. it is affordable to most advertisers2. With the increase in the number of TV channels, ________.A. the cost of TV advertising has decreasedB. the number of TV viewers has increasedC. advertisers’ interest in other media has decreasedD. the number of TV ads people can see has increased3. Compared with television, newspaper as an advertising medium ________.A. earn a larger annual ad revenueB. convey more detailed messagesC. use more production techniquesD. get messages out more effectively4. Advertising on radio continues to grow because ________.A. more local radio stations have been set upB. modern technology makes it more entertainingC. it provides easy access to consumersD. it has been revolutionized by Internet radio5. Magazines are seen by advertisers as an efficient way to ________.A. reach target audiencesB. appeal to educated peopleC. attract diverse audiencesD. convey all kinds of messages6. Out-of-home advertising has become more effective because ________.A. billboards can be replaced within two hoursB. consumers travel more now than ever beforeC. such ads have been made much more attractiveD. the pace of urban life is much faster nowadays7. The challenge to Internet advertisers is to create ads that are ________.A. quick to updateB. pleasant to look atC. easy to rememberD. convenient to access8. Internet advertisers will have to adjust their methods to reach audiences thattend to be_________________.9. Direct mail is an effective form of advertising for businesses to develop_______________.10. This passage discusses how advertisers select ______ __ for advertisements.（8-10题答案请写在答题纸上）Part II Listening Comprehension (35%) Section A (15%)Directions:In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer. Then mark the corresponding letter on the Answer Sheet with a single line through the centre.11. A. To reach US$13 million. B. To reach US$30 million.C. To reach US$300 million.D. To reach US$3 million.12. A. 80%. B. 60%. C. 50%. D. 70%.13. A. 160. B. 60. C. 116. D. 106.14. A. Meet Mr. Wilson. B. Make a cup of tea.C. Give Mr. Milson a call.D. Write down the number.15. A. The man does not need a car to get around.B. The man lives far away from the subway.C. The man is not good at driving.D. The man enjoys driving a car.16. A. It is attractive. B. It is exciting.C. It is boring.D. It is important.17. A. Stay at home and complete the paper on her own.B. Save time by using Mary’s computer.C. Buy a computer herself.D. Borrow Mary’s computer.18. A. Talk to the boss. B. Restart the discussion.C. Have a fresh mind.D. Have a break.Questions 19 to 22 are based on the conversation you have just heard.19. A. Her mother. B. Her friend.C. Her husband.D. Herself.20. A. A 40 percent discount. B. A 10 percent discount.C. A 15 percent discount.D. A 20 percent discount.21. A. 40 dollars. B. 48 dollars.C. 60 dollars.D. 54 dollars.22. A. Because the woman has only 47 dollars.B. Because there’s a button missing on the blouse.C. Because it is the last blouse.D. Because it is the special offer for this week.Questions 23 to 25 are based on the conversation you have just heard.23. A. In the dining hall. B. In the room.C. In the Rainbow Bar.D. Not given.24. A. Room 610. B. Room 061.C. Room 106.D. Room 601.25. A. In a motel. B. In a hotel.C. In a dormitory.D. In a bar.Section B (10%)Directions: In this section, you will hear 3 short passages. At the end of each passage, you will hear some questions. Both the passage and the questions will be spoken only once. After you hear a question, you must choose the best answer from the four choices marked A, B, C and D. Then mark the corresponding letter on the Answer Sheet with a single line through the center.Passage OneQuestions 26 to 28 are based on the passage you have just heard.26. A. Many foreign tourists visit the United States every year.B. Americans enjoy eating out with their friends.C. The United States is a country of immigrants.D. Americans prefer foreign foods to their own food.27. A. They can make friends with people from other countries.B. They can get to know people of other cultures and their lifestyles.C. They can practice speaking foreign languages there.D. They can meet with businessmen from all over the world.28. A. The couple cooks the dishes and the children help them.B. The husband does the cooking and the wife serves as the waitress.C. The mother does the cooking while the father and the children wait on the guests.D. A hired cook prepares the dishes and the family members serve the guests. Passage TwoQuestions 29 to 31 are based on the passage you have just heard.29. A. Their family members. B. Their relatives.C. Their closed friends.D. Strangers.30. A. To get advice. B. To subscribe.C. To place an advertisement.D. To apply for membership.31. A. They are two well-known writers who give advice.B. They are two famous doctors.C. They are two lawyers.D. They are two professors at the New York State University.Passage ThreeQuestions 32 to 35 are based on the passage you have just heard.32. A. At 7:00. B. At 7:50.C. On time.D. Behind its time.33. A. To take a taxi to St. Louis.B. To take a bus to St. Louis.C. To carry his bags and hurry to the Union Station.D. To get off before Union Station and take a taxi.34. A. He managed to catch the train he needed.B. He failed to catch the train to St. Louis.C. As soon as he got on the train it began to leave the station.D. Thanks to the porter’s help, he was in time for the train.35. A. Late Again. B. A Helpful Conductor.C. At the Union Station.D. Conductor, Porter and I.Section C (10%)Directions:In this section, you will hear a passage three times. When the passage is read for the first time, you should listen carefully for its general idea. When the passage is read for the second time, you are required to fill in the blanks numbered from 36 to 43 with the exact words you have just heard. For blanks numbered from 44 to 46 you are required to fill in the missing information. For these blanks, you can either use the exact words you have just heard or write down the main points in your own words. Finally, when the passage is read for the third time, you should check what you have written. （答案请写在答题纸上）Americans are used to traveling. Some people make long-distance commutes to work (36) __________. Their jobs may even require them to take (37) __________ business trips. Most companies provide an (38) __________ vacation for their employees and people often use that time to travel. Some people just visit friends or relatives in distant states. Others go on low-budget (39) __________ excursions and stay in economy motels. Those with more (40) __________tastes choose luxurious resorts and hotels. Camping out in the great (41) __________appeals to adventurous types.Most Americans prefer to travel within their nation’s borders. Why? For one thing, it’s cheaper than traveling (42) __________ and there’s no language problems. But besides that, the vast American territory offers numerous tourist attractions. Nature lovers can enjoy beaches, mountains, canyons, lakes and a wealth of natural wonders. (43) __________ cities offer visitors a multitude of urbandelights. The convenience of modern freeways, (44) ___________________ makes travel in America as easy as pie.Many American vacations are as unique as unique as the people who take them. Families often plan their trips with (45) _____________________. More and more “family friendly” vacation resorts offer special programs for children. History buffs seek out famous historical sites and museums. Environmentalists prefer “green vacations”. Some people find sea cruises (46) _______________________________. Others hit the water to go fishing, skiing or white-water rafting.Part III Reading Comprehension (20%) Directions: There are 2 passages in this section. Each passage is followed by some questions or unfinished statements. For each of them there are four choices marked A, B, C and D. You should decide on the best choice and mark the corresponding letter on Answer Sheet with a single line through the center.Passage OnePart-time jobs are nothing new to us college students. It is common for students to practice their salesmanship when they have free time. However, I was extremely shocked when I learned one of our teachers had also joined in the profit-making business.She is our physical education teacher. The other day she publicly commented on the pimples (丘疹) on a student’s face and then presented the girl with a sample bottle of nameless face cream.According to the teacher, the face cream was produced in France. Each small bottle costs more than 40 yuan. From my viewpoint, it is a complete waste of money to buy such thing. “Why don’t you decline and refuse to buy it?” I suggested to the girl. She signed, “If I do that, I am afraid that my teacher may give me a lower mark in PE.” In other words, as long as she made a good deal with the teacher, an “excellent” on her PE course would follow.I was depressed. The teacher abused her social role. Her priority should be to give us proper education and training. Instead, she is trying to make a profit from us. She is unfit to be a good “engineer in cultivat ing the spirit of mankind”.47. The idea for students to do part-time jobs is _________.A. unheardB. uncommonC. surprisingD. not fresh48. The teacher made a comment on the pimples on a student’s face in order to _________.A. sell somethingB. show concern for the studentsC. make her lessons more interestingD. help her students learn something49. The writer believes that the cream _________.A. is worthy buyingB. is of high qualityC. is uselessD. can cure the pimples on the student’s face50. We may infer that _________.A. many students bought the creamB. no students bought the creamC. the writer got some free creamD. the cream was made by the teacher herself51. From the passage we can infer that _________.A. some students have failed their PE examsB. the students don’t like the teacherC. the teacher is welcome by her studentsD. the teacher has given her students proper education and trainingPassage TwoShu Pudong has helped at least l, 000 people bitten by snakes. “It was seeing people with snake bites that led me to this career,” he said.In 1963, after his army service, Shu entered a medical school and later became a doctor of Chinese medicine. As part of his studies he had to work in the mountains. There he often heard of people who had their arms or legs cut off after a snake bite in order to save their lives.“I was greatly upset by the story of an old farmer I met. It was a very hot afternoon. The old man was pulling grass in his field when he felt a pain in his left hand. He at once realized that he had been bitten by a poisonous snake. In no time, he wrapped a cloth tightly around his arm to stop the poison spreading to the heart. Rushing home he shouted ‘Bring me the knife’. Minutes later the man lost his arm forever.”“The sad story touched me so much that I decided to devote myself to helping people bitten by snakes,” Shu said.52. The best title for this article is “_________”.A. Astonishing MedicineB. Farmer Loses ArmC. Dangerous BitesD. Snake Doctor53. The farmer lost his arm because _________.A. the cloth was wrapped too tightlyB. he cut it off to save his lifeC. Shu wasn’t there to help himD. he was alone in the field54. Shu decided to devote himself to snake medicine because _________.A. he wanted to save people’s arms and legsB. he had studied it at a medical schoolC. he had seen snakes biting peopleD. his army service had finished55. Why did Shu go into the mountains？A. He didn’t want to study snake bites.B. He wanted to help the farmers.C. He was being trained to be a doctor.D. He was expected to serve in the army.56. Which of the following words can take the place of the underlined word “career”in the first paragraph？A. conclusionB. storyC. incidentD. jobPart Ⅳ Cloze (10%) Directions: There are20 blanks in the following passage. For each blank there are four choices marked A, B, C and D. You should choose the ONE that best fits into the passage. Then mark the corresponding letter on Answer Sheet with a single line through the center.For many people today, reading is no longer relaxation. To keep up their work they must read letters, reports, trade publications, interoffice communications, not to mention newspapers and magazines: a never-ending flood of words. In __57__a job or advancing in one, the ability to read and comprehend __58__can mean the difference between success and failure. Yet the unfortunate fact is that most of us are__59__readers. Most of us develop poor reading __60__at an early age, and never get over them. The main deficiency__61__in the actual stuff of language itself—words. Taken individually, words have __62__meaning until they are strung together into phrases, sentences and paragraphs. __63__, however, the untrained reader does not read groups of words. He laboriously reads one word at a time, often regressing to __64__words or passages. Regression, the tendency to look back over__65__you have just read, is a common bad habit in reading. Another habit which __66__down the speed of reading is vocalization—sounding each word either orally or mentally as __67__reads.To overcome these bad habits, some reading clinics use a device called an __68__, which moves a bar (or curtain) down the page at a predetermined speed. The bar is set at a slightly faster rate __69__the reader finds comfortable, in order to “stretch”him. The accelerator forces the reader to read fast, __70__word-by-word reading, regression and sub-vocalization, practically impossible. At first __71__is sacrificed for speed. But when you learn to read idea s and concepts, you will not only read faster, __72__your comprehension will improve. Many people have found __73__reading skill drastically improved after some training. __74__Chalice Au, a business manager, for instance, his reading rate was a reasonably good 172 words a minute __75__the training, now it is an excellent 1,378 words a minute. He is delighted that how he can __76__a lot more reading material in a short period of time.57. A. applying B. doing C. offering D. getting58. A. quickly B. easily C. roughly D. decidedly59. A. good B. curious C. poor D. urgent60. A. training B. habits C. situations D. custom61. A. lies B. combines C. touches D. involves62. A. some B. a lot C .little D. dull63. A. Fortunately B. In fact C. Logically D. Unfortunately64. A. reuse B. reread C. rewrite D. recite65. A. what B. which C. that D. if66. A. scales B. cuts C. slows D. measures67. A. some one B. one C. he D. reader68. A. accelerator B. actor C. amplifier D. observer69. A. then B. as C. beyond D. than70. A. enabling B. leading C. making D. indicating71. A. meaning B. comprehension C. gist D. regression72. A. but B. nor C. or D. for73. A. our B. your C. their D. such a74. A. Look at B. Take C. Make D. Consider75. A. for B. in C. after D. before76. A. master B. go over C. present D. get throughPart V Translation (10%)Directions: Complete sentences by translating into English the Chinese given inbrackets. Put the answers down on the Answer Sheet. （答案请写在答题纸上）77. The beauty of the West Lake in Hangzhou is ________________________ (我无法用语言来表述).78. Why is she looking at me ________________________ (像是她认识我似的)? I’venever seen her before in my life.79. I don’t enjoy going to the movies. ________________________ (在我看来), it’sjust a waste of time.80. The Canadian speaks Chinese ________________________ (和他说英语一样流利).81. ________________________ (Tony 是否来), doesn’t matter much. We can rely onourselves.Part VI Writing(15%)Directions: For this part, you are required to write a short essay on the topicAttend Your Classes Regularly. You should write at least 120 words (no morethan 150 words) based on the outline given below:1.现在大学校园里，迟到、早退、旷课是常见的现象。

中考数学模拟试卷一附答案解析

2021年湖南省长沙市教科所中考模拟试卷〔一〕数学一、选择题〔在以下各题四个选项中，只有一项为哪一项符合题意．请在答题卡中填涂符合题意选项．本大题共12个小题，每题3分，共36分〕1．以下各组数中，互为相反数是〔〕A．﹣2 与2B．2与2C．3与D．3与32．长城、故宫等是我国第一批胜利入选世界遗产文化古迹，长城总长约6 700 000米，将6 700 000用科学记数法表示应为〔〕×106×10﹣6×105×1073．如图，与∠1是内错角是〔〕A．∠2B．∠3C．∠4D．∠54．以下运算正确是〔〕A．B．C．a2•a3=a5D．〔2a〕3=2a35．如图是小强用八块一样小正方体积木搭建几何体，这个几何体左视图是〔〕A．B．C．D．6．如图，点C、D是线段AB上两点，点D是线段AC中点．假设AB=10cm，BC=4cm，那么线段DB长等于〔〕A．2cm B．3cm C．6cm D．7cm7．以下命题中，错误是〔〕A．三角形两边之和大于第三边B．三角形外角和等于360°C．等边三角形既是轴对称图形，又是中心对称图形8．有15位同学参与歌咏竞赛，所得分数互不一样，获得分前8位同学进入决赛．某同学知道自己分数后，要推断自己能否进入决赛，他只需知道这15位同学〔〕A．平均数B．中位数C．众数D．方差9．某人想沿着梯子爬上高4米房顶，梯子倾斜角〔梯子与地面夹角〕不能＞60°，否那么就有危急，那么梯子长至少为〔〕A．8米B．米C．米D．米10．如图，要使平行四边形ABCD成为矩形，需添加条件是〔〕A．AB=BC B．AC⊥BD C．∠ABC=90°D．∠1=∠211．关于x方程〔a﹣5〕x2﹣4x﹣1=0有实数根，那么a满意〔〕A．a≥1B．a＞1且a≠5C．a≥1且a≠5D．a≠512．如图1，点E为矩形ABCD边AD上一点，点P从点B动身沿BE→ED→DC运动到点C停顿，点Q从点B动身沿BC运动到点C停顿，它们运动速度都是1cm/s．假设点P、Q同时开始运动，设运动时间为t〔s〕，△BPQ面积为y〔cm2〕，y与t之间函数图象如图2所示．给=48cm2；③14＜t＜22时，出以下结论：①当0＜t≤10时，△BPQ是等腰三角形；②S△ABEy=110﹣5t；④在运动过程中，使得△ABP是等腰三角形P点一共有3个；⑤当△BPQ与△BEA相像时，t=14.5．其中正确结论序号是〔〕A．①④⑤B．①②④C．①③④D．①③⑤二、填空题〔本大题共6个小题，每题3分，共18分〕13．假设二次根式有意义，那么x取值范围为．14．一个布袋里装有2个红球，3个白球和a个黄球，这些球除颜色外其余都一样．假设从该布袋里随意摸出1个球，是红球概率为，那么a等于．16．某蔬菜基地圆弧形蔬菜大棚剖面如下图，AB=16m，半径OA=10m，那么蔬菜大棚高度CD=m．17．如图，在△ABC中，BE平分∠ABC，DE∥BC，假如DE=2AD，AE=3，那么EC=．18．如图，在菱形ABCD中，DE⊥AB于点E，cosA=，BE=4，那么tan∠DBE值是．三、解答题〔本大题共8个小题，第19、20题每题6分，第21、22题每题6分，第23、24题每题6分，第25、26题每题6分，共66分．解容许写出必要文字说明、证明过程或演算步骤〕19．〔6分〕计算：〔π﹣3.14〕0﹣2﹣|﹣3|=．20．〔6分〕解不等式组，并写出其全部整数解．21．〔8分〕“端午节〞是我国传统佳节，民间历来有吃“粽子〞风俗．我市某食品厂为理解市民对去年销量较好肉馅粽、豆沙馅粽、红枣馅粽、蛋黄馅粽〔以下分别用A、B、C、D表示〕这四种不同口味粽子宠爱状况，在节前对某居民区市民进展了抽样调查，并将调查状况绘制成如下两幅统计图〔尚不完好〕．请根据以上信息答复：〔1〕本次参与抽样调查居民有多少人？〔2〕将两幅不完好图补充完好；〔3〕求扇形统计图中C所对圆心角度数；〔4〕假设有外型完全一样A、B、C、D粽各一个，煮熟后，小王吃了两个．用列表或画树状图方法，求他第二个吃到恰好是C粽概率．22．〔8分〕如图，AB为圆O直径，点C为圆O上一点，假设∠BAC=∠CAM，过点C作直线l垂直于射线AM，垂足为点D．〔1〕试推断CD与圆O位置关系，并说明理由；〔2〕假设直线l与AB延长线相交于点E，圆O半径为3，并且∠CAB=30°，求AD长．23．〔9分〕由甲、乙两个工程队承包某校校园绿化工程，甲、乙两队单独完成这项工作所需时间比是3：2，两队共同施工6天可以完成．〔1〕求两队单独完成此项工程各需多少天？〔2〕此项工程由甲、乙两队共同施工6天完成任务后，学校付给他们4000元酬劳，假设按各自完成工程量安排这笔钱，问甲、乙两队各应得到多少元？24．〔9分〕如图，边长为1正方形ABCD对角线AC、BD相交于点O．有直角∠MPN，使直角顶点P与点O重合，直角边PM、PN分别与OA、OB重合，然后逆时针旋转∠MPN，旋转角为θ〔0°＜θ＜90°〕，PM、PN分别交AB、BC于E、F两点，连接EF交OB于点G．〔1〕求四边形OEBF面积；〔2〕求证：OG•BD=EF2；25．〔10分〕在数学上，我们把符合肯定条件动点所形成图形叫做满意该条件点轨迹．例如：动点P坐标满意〔m，m﹣1〕，全部符合该条件点组成图象在平面直角坐标系xOy中就是一次函数y=x﹣1图象．即点P轨迹就是直线y=x﹣1．〔1〕假设m、n满意等式mn﹣m=6，那么〔m，n﹣1〕在平面直角坐标系xOy中轨迹是；〔2〕假设点P〔x，y〕到点A〔0，1〕间隔与到直线y=﹣1间隔相等，求点P轨迹；〔3〕假设抛物线y=上有两动点M、N满意MN=a〔a为常数，且a≥4〕，设线段MN中点为Q，求点Q到x轴最短间隔．26．〔10分〕如图1，二次函数y=ax2﹣2ax﹣3a〔a＜0〕图象与x轴交于A、B两点〔点A在点B右侧〕，与y轴正半轴交于点C，顶点为D．〔1〕求顶点D坐标〔用含a代数式表示〕；〔2〕假设以AD为直径圆经过点C．①求抛物线函数关系式；②如图2，点E是y轴负半轴上一点，连接BE，将△OBE绕平面内某一点旋转180°，得到△PMN〔点P、M、N分别和点O、B、E对应〕，并且点M、N都在抛物线上，作MF⊥x轴于点F，假设线段MF：BF=1：2，求点M、N坐标；③点Q在抛物线对称轴上，以Q为圆心圆过A、B两点，并且和直线CD相切，如图3，求点Q坐标．参考答案与试题解析一、选择题1．以下各组数中，互为相反数是〔〕A．﹣2 与2B．2与2C．3与D．3与3【分析】根据相反数概念作出推断．【解答】解：A．﹣2与2互为相反数，正确；B.2=2，不是相反数，故错误；×=1，互为倒数，故错误；D.3=3，不是相反数，故错误；应选：A．【点评】此题考察了相反数，解决此题关键是熟记相反数定义．2．长城、故宫等是我国第一批胜利入选世界遗产文化古迹，长城总长约6 700 000米，将6 700 000用科学记数法表示应为〔〕×106×10﹣6×105×107【分析】科学记数法表示形式为a×10n形式，其中1≤|a|＜10，n为整数．确定n值时，要看把原数变成a时，小数点挪动了多少位，n肯定值与小数点挪动位数一样．当原数肯定值＞1时，n是正数；当原数肯定值＜1时，n是负数．【解答】×106，应选：A．【点评】此题考察科学记数法表示方法．科学记数法表示形式为a×10n形式，其中1≤|a|＜10，n为整数，表示时关键要正确确定a值以及n值．3．如图，与∠1是内错角是〔〕A．∠2B．∠3C．∠4D．∠5【分析】根据内错角定义找出即可．应选：B．【点评】此题考察了“三线八角〞问题，确定三线八角关键是从截线入手．对平面几何中概念理解，肯定要紧扣概念中关键词语，要做到对它们正确理解，对不同几何语言表达要留意理解它们所包含意义．4．以下运算正确是〔〕A．B．C．a2•a3=a5D．〔2a〕3=2a3【分析】根据算术平方根定义、二次根式加减运算、同底数幂乘法及积乘方运算法那么逐一计算即可推断．【解答】解：A、=2，此选项错误；B、2+不能进一步计算，此选项错误；C、a2•a3=a5，此选项正确；D、〔2a〕3=8a3，此选项计算错误；应选：C．【点评】此题主要考察二次根式加减和幂运算，解题关键是驾驭算术平方根定义、二次根式加减运算、同底数幂乘法及积乘方运算法那么．5．如图是小强用八块一样小正方体积木搭建几何体，这个几何体左视图是〔〕A．B．C．D．【分析】左视图有2列，从左到右分别是2，1个正方形．【解答】解：这个几何体左视图是，应选：D．【点评】此题主要考察了简洁组合体三视图，关键是驾驭左视图所看位置．6．如图，点C、D是线段AB上两点，点D是线段AC中点．假设AB=10cm，BC=4cm，那么线段DB长等于〔〕A．2cm B．3cm C．6cm D．7cm【分析】先根据线段和差关系求出AC，再根据中点定义求得CD长，再根据BD=CD+BC即可解答．【解答】解：∵AB=10，BC=4，∴AC=AB﹣BC=6，∵点D是AC中点，∴AD=CD=AC=3．∴BD=BC+CD=4+3=7cm，应选：D．【点评】此题考察了两点间间隔，根据是娴熟驾驭线段和差计算，以及中点定义．7．以下命题中，错误是〔〕A．三角形两边之和大于第三边B．三角形外角和等于360°C．等边三角形既是轴对称图形，又是中心对称图形D．三角形一条中线能将三角形分成面积相等两部分【分析】根据三角形性质即可作出推断．【解答】解：A、正确，符合三角形三边关系；B、正确；三角形外角和定理；C、错误，等边三角形既是轴对称图形，不是中心对称图形；D、三角形一条中线能将三角形分成面积相等两部分，正确．应选：C．【点评】此题考察了命题真假推断，属于根底题．根据定义：符合事实真理推断是真命题，不符合事实真理推断是假命题，不难选出正确项．8．有15位同学参与歌咏竞赛，所得分数互不一样，获得分前8位同学进入决赛．某同学知道自己分数后，要推断自己能否进入决赛，他只需知道这15位同学〔〕A．平均数B．中位数C．众数D．方差【分析】由中位数概念，即最中间一个或两个数据平均数；可知15人成果中位数是第8名成果．根据题意可得：参赛选手要想知道自己是否能进入前8名，只须要理解自己成果以及全部成果中位数，比较即可．【解答】解：由于15个人中，第8名成果是中位数，故小方同学知道了自己分数后，想知道自己能否进入决赛，还需知道这十五位同学分数中位数．【点评】此题主要考察统计有关学问，主要包括平均数、中位数、众数意义．反映数据集中程度统计量有平均数、中位数、众数等，各有局限性，因此要对统计量进展合理选择和恰当运用．9．某人想沿着梯子爬上高4米房顶，梯子倾斜角〔梯子与地面夹角〕不能＞60°，否那么就有危急，那么梯子长至少为〔〕A．8米B．米C．米D．米【分析】倾斜角取最大，利用最大角正弦值即可求解．【解答】解：如图：AC=4，AC⊥BC．∵梯子倾斜角〔梯子与地面夹角〕不能＞60°．∴∠ABC≤60°，最大角为60°．∴AB====4×===．即梯子长至少为米．应选：C．【点评】此题主要考察学生对直角三角形坡度问题驾驭，做此题关键是明白当梯子倾斜角越大时梯子长度要求越短，所以坡角取最大值．10．如图，要使平行四边形ABCD成为矩形，需添加条件是〔〕A．AB=BC B．AC⊥BD C．∠ABC=90°D．∠1=∠2【分析】根据一个角是90度平行四边形是矩形进展选择即可．【解答】解：A、是邻边相等，可断定平行四边形ABCD是菱形；B、是对角线互相垂直，可断定平行四边形ABCD是菱形；C、是一内角等于90°，可推断平行四边形ABCD成为矩形；D、是对角线平分对角，可断定平行四边形ABCD是菱形．【点评】此题主要应用学问点为：矩形断定．①对角线相等且互相平分四边形为矩形．②一个角是90度平行四边形是矩形．11．关于x方程〔a﹣5〕x2﹣4x﹣1=0有实数根，那么a满意〔〕A．a≥1B．a＞1且a≠5C．a≥1且a≠5D．a≠5【分析】由于x方程〔a﹣5〕x2﹣4x﹣1=0有实数根，那么分两种状况：〔1〕当a﹣5=0时，方程肯定有实数根；〔2〕当a﹣5≠0时，方程成为一元二次方程，利用判别式即可求出a 取值范围．【解答】解：分类探讨：①当a﹣5=0即a=5时，方程变为﹣4x﹣1=0，此时方程肯定有实数根；②当a﹣5≠0即a≠5时，∵关于x方程〔a﹣5〕x2﹣4x﹣1=0有实数根∴16+4〔a﹣5〕≥0，∴a≥1．∴a取值范围为a≥1．应选：A．【点评】此题考察了一元二次方程ax2+bx+c=0〔a≠0〕根判别式△=b2﹣4ac：当△＞0，方程有两个不相等实数根；当△=0，方程有两个相等实数根；当△＜0，方程没有实数根；切记不要忽视一元二次方程二次项系数不为零这一隐含条件．12．如图1，点E为矩形ABCD边AD上一点，点P从点B动身沿BE→ED→DC运动到点C停顿，点Q从点B动身沿BC运动到点C停顿，它们运动速度都是1cm/s．假设点P、Q同时开始运动，设运动时间为t〔s〕，△BPQ面积为y〔cm2〕，y与t之间函数图象如图2所示．给=48cm2；③14＜t＜22时，出以下结论：①当0＜t≤10时，△BPQ是等腰三角形；②S△ABEy=110﹣5t；④在运动过程中，使得△ABP是等腰三角形P点一共有3个；⑤当△BPQ与△BEA相像时，t=14.5．其中正确结论序号是〔〕A．①④⑤B．①②④C．①③④D．①③⑤【分析】根据题意，得到P、Q分别同时到达D、C可推断①②，分段探讨PQ位置后可以推断③，再由等腰三角形分类探讨方法确定④，根据两个点相对位置推断点P在DC上时，存在△BPQ与△BEA相像可能性，分类探讨计算即可．【解答】解：由图象可知，点Q到达C时，点P到E那么BE=BC=10，ED=4故①正确那么AE=10﹣4=6t=10时，△BPQ面积等于∴AB=DC=8=故S△ABE故②错误当14＜t＜22时，y=故③正确；分别以A、B为圆心，AB为半径画圆，将两圆交点连接即为AB垂直平分线那么⊙A、⊙B及AB垂直平分线与点P运行途径交点是P，满意△ABP是等腰三角形此时，满意条件点有4个，故④错误．∵△BEA为直角三角形∴只有点P在DC边上时，有△BPQ与△BEA相像由，PQ=22﹣t∴当或时，△BPQ与△BEA相像分别将数值代入或解得t=故⑤正确应选：D．【点评】此题是动点问题函数图象探究题，考察了三角形相像断定、等腰三角形断定，应用了分类探讨和数形结合数学思想．二、填空题〔本大题共6个小题，每题3分，共18分〕13．假设二次根式有意义，那么x取值范围为x≥．【分析】函数关系中主要有二次根式．根据二次根式意义，被开方数是非负数．【解答】解：根据题意得：1+2x≥0，解得x≥﹣．故答案为：x≥﹣．【点评】此题主要考察自变量取值范围，函数自变量范围一般从三个方面考虑：〔1〕当函数表达式是整式时，自变量可取全体实数；〔2〕当函数表达式是分式时，考虑分式分母不能为0；〔3〕当函数表达式是二次根式时，被开方数为非负数．14．一个布袋里装有2个红球，3个白球和a个黄球，这些球除颜色外其余都一样．假设从该布袋里随意摸出1个球，是红球概率为，那么a等于1．【分析】设袋中有a个黄球，再根据概率公式求出a值即可．【解答】解：设袋中有a个黄球，∵袋中有红球2个，白球3个，从中随意摸出一个球是红球概率为，∴=，解得：a=1．故答案为：1．【点评】此题考察是概率公式，熟知随机事务A概率P〔A〕=事务A可能出现结果数与全部可能出现结果数商是解答此题关键．15．假设反比例函数y=图象位于第一、三象限，那么正整数k值是1．【分析】由反比例函数性质列出不等式，解出k范围，在这个范围写出k整数解那么可．【解答】解：∵反比例函数图象在一、三象限，∴2﹣k＞0，即k＜2．又∵k是正整数，∴k值是：1．故答案为：1．【点评】此题考察了反比例函数性质：当k＞0时，图象分别位于第一、三象限；当k＜0时，图象分别位于第二、四象限．16．某蔬菜基地圆弧形蔬菜大棚剖面如下图，AB=16m，半径OA=10m，那么蔬菜大棚高度CD=4m．【分析】由垂径定理，可得AD=AB，然后由勾股定理求得OD长，继而求得中间柱CD高度．【解答】解：∵CD是中间柱，即=，∴OC⊥AB，∴AD=BD=AB=×16=8〔m〕，∵半径OA=10m，在Rt△AOD中，OD==6〔m〕，∴CD=OC﹣OD=10﹣6=4〔m〕．故答案为：4【点评】此题考察了垂径定理应用与勾股定理．此题比较简洁，留意数形结合思想应用．17．如图，在△ABC中，BE平分∠ABC，DE∥BC，假如DE=2AD，AE=3，那么EC=6．【分析】由BE平分∠ABC，DE∥BC，易得△BDE是等腰三角形，即可得BD=2AD，又由平行线分线段成比例定理，即可求得答案．【解答】解：∵DE∥BC，∴∠DEB=∠CBE，∵BE平分∠ABC，∴∠ABE=∠CBE，∴∠ABE=∠DEB，∴BD=DE，∵DE=2AD，∴BD=2AD，∵DE∥BC，∴AD：DB=AE：EC，∴EC=2AE=2×3=6．故答案为：6．【点评】此题考察了平行线分线段成比例定理以及等腰三角形断定与性质．留意驾驭线段对应关系是解此题关键．18．如图，在菱形ABCD中，DE⊥AB于点E，cosA=，BE=4，那么tan∠DBE值是2．【分析】求出AD=AB，设AD=AB=5x，AE=3x，那么5x﹣3x=4，求出x，得出AD=10，AE=6，在Rt△ADE中，由勾股定理求出DE=8，在Rt△BDE中得出tan∠DBE=，代入求出即可，【解答】解：∵四边形ABCD是菱形，∴AD=AB，∵cosA=，BE=4，DE⊥AB，∴设AD=AB=5x，AE=3x，那么5x﹣3x=4，x=2，即AD=10，AE=6，在Rt△ADE中，由勾股定理得：DE==8，在Rt△BDE中，tan∠DBE===2，故答案为：2．【点评】此题考察了菱形性质，勾股定理，解直角三角形应用，关键是求出DE长．三、解答题〔本大题共8个小题，第19、20题每题6分，第21、22题每题6分，第23、24题每题6分，第25、26题每题6分，共66分．解容许写出必要文字说明、证明过程或演算步骤〕19．〔6分〕计算：〔π﹣3.14〕0﹣2﹣|﹣3|=﹣1．【分析】此题涉及零指数幂、负指数幂、二次根式化简和特别角三角函数值4个考点．在计算时，须要针对每个考点分别进展计算，然后根据实数运算法那么求得计算结果．【解答】解：原式=1﹣2×+4﹣3，=1﹣3+4﹣3，=﹣1．故答案为：﹣1．【点评】此题主要考察了实数综合运算实力，是各地中考题中常见计算题型．解决此类题目关键是娴熟驾驭负整数指数幂、零指数幂、二次根式、肯定值等考点运算．20．〔6分〕解不等式组，并写出其全部整数解．【分析】先求出不等式组解集，即可求得该不等式组整数解．【解答】解：由①得，x≥1，由②得，x＜4．所以不等式组解集为1≤x＜4，该不等式组整数解为1，2，3．【点评】此题考察是解一元一次不等式组及求一元一次不等式组整数解，求不等式公共解，要遵循以下原那么：同大取较大，同小取较小，小大大小中间找，大大小小解不了．21．〔8分〕“端午节〞是我国传统佳节，民间历来有吃“粽子〞风俗．我市某食品厂为理解市民对去年销量较好肉馅粽、豆沙馅粽、红枣馅粽、蛋黄馅粽〔以下分别用A、B、C、D表示〕这四种不同口味粽子宠爱状况，在节前对某居民区市民进展了抽样调查，并将调查状况绘制成如下两幅统计图〔尚不完好〕．请根据以上信息答复：〔1〕本次参与抽样调查居民有多少人？〔2〕将两幅不完好图补充完好；〔3〕求扇形统计图中C所对圆心角度数；〔4〕假设有外型完全一样A、B、C、D粽各一个，煮熟后，小王吃了两个．用列表或画树状图方法，求他第二个吃到恰好是C粽概率．【分析】〔1〕根据B类有60人，所占百分比是10%即可求解；〔2〕利用总人数减去其他类型人数即可求得C类型人数，然后根据百分比意义求解；〔3〕利用360°乘以对应百分比即可求解；〔4〕利用列举法即可求解．【解答】解：〔1〕本次参与抽样调查居民人数是：60÷10%=600〔人〕；〔2〕C类人数是：600﹣180﹣60﹣240=120〔人〕，C类所占百分比是：×100%=20%，A类所占百分比是：×100%=30%．；〔3〕扇形统计图中C所对圆心角度数是：360°×20%=72°；〔4〕画树状图如下：那么他第二个吃到恰好是C粽概率是：=．【点评】此题考察是条形统计图和扇形统计图综合运用，读懂统计图，从不同统计图中得到必要信息是解决问题关键．条形统计图能清晰地表示出每个工程数据；扇形统计图干脆反映部分占总体百分比大小．22．〔8分〕如图，AB为圆O直径，点C为圆O上一点，假设∠BAC=∠CAM，过点C作直线l垂直于射线AM，垂足为点D．〔1〕试推断CD与圆O位置关系，并说明理由；〔2〕假设直线l与AB延长线相交于点E，圆O半径为3，并且∠CAB=30°，求AD长．【分析】〔1〕连接OC，求出OC和AD平行，求出OC⊥CD，根据切线断定得出即可；〔2〕连接BC，解直角三角形求出BC和AC，求出△BCA∽△CDA，得出比例式，代入求出即可．【解答】解：〔1〕CD与圆O位置关系是相切，理由是：连接OC，∵OA=OC，∴∠OCA=∠CAB，∵∠CAB=∠CAD，∴∠OCA=∠CAD，∴OC∥AD，∵CD⊥AD，∴OC⊥CD，∵OC为半径，∴CD与圆O位置关系是相切；〔2〕连接BC，∵AB是⊙O直径，∴∠BCA=90°，∵圆O半径为3，∴AB=6，∵∠CAB=30°，∴BC=AB=3，AC=BC=3，∵∠BCA=∠CDA=90°，∠CAB=∠CAD，∴△CAB∽△DAC，∴=，∴=，∴AD=．【点评】此题考察了切线性质和断定，圆周角定理，相像三角形性质和断定，解直角三角形等学问点，能综合运用学问点进展推理是解此题关键．23．〔9分〕由甲、乙两个工程队承包某校校园绿化工程，甲、乙两队单独完成这项工作所需时间比是3：2，两队共同施工6天可以完成．〔1〕求两队单独完成此项工程各需多少天？〔2〕此项工程由甲、乙两队共同施工6天完成任务后，学校付给他们4000元酬劳，假设按各自完成工程量安排这笔钱，问甲、乙两队各应得到多少元？【分析】〔1〕设甲队单独完成此项工程须要3x天，那么乙队单独完成此项工程须要2x天，根据两队共同施工6天可以完成该工程，即可得出关于x分式方程，解之经检验即可得出结论；〔2〕根据甲、乙两队单独完成这项工作所需时间比可得出两队每日完成工作量之比，再结合总酬劳为4000元即可求出结论．【解答】解：〔1〕设甲队单独完成此项工程须要3x天，那么乙队单独完成此项工程须要2x 天，根据题意得： +=1，解得：x=5，经检验，x=5是所列分式方程解且符合题意．∴3x=15，2x=10．答：甲队单独完成此项工程须要15天，乙队单独完成此项工程须要10天．〔2〕∵甲、乙两队单独完成这项工作所需时间比是3：2，∴甲、乙两队每日完成工作量之比是2：3，∴甲队应得酬劳为4000×=1600〔元〕，乙队应得酬劳为4000﹣1600=2400〔元〕．答：甲队应得酬劳为1600元，乙队应得酬劳为2400元．【点评】此题考察了分式方程应用，找准等量关系，正确列出分式方程是解题关键．24．〔9分〕如图，边长为1正方形ABCD对角线AC、BD相交于点O．有直角∠MPN，使直角顶点P与点O重合，直角边PM、PN分别与OA、OB重合，然后逆时针旋转∠MPN，旋转角为θ〔0°＜θ＜90°〕，PM、PN分别交AB、BC于E、F两点，连接EF交OB于点G．〔1〕求四边形OEBF面积；〔2〕求证：OG•BD=EF2；〔3〕在旋转过程中，当△BEF与△COF面积之和最大时，求AE长．【分析】〔1〕由四边形ABCD是正方形，直角∠MPN，易证得△BOE≌△COF〔ASA〕，那么可证得S四边形OEBF =S△BOC=S正方形ABCD；〔2〕易证得△OEG∽△OBE，然后由相像三角形对应边成比例，证得OG•OB=OE2，再利用OB 与BD关系，OE与EF关系，即可证得结论；〔3〕首先设AE=x，那么BE=CF=1﹣x，BF=x，继而表示出△BEF与△COF面积之和，然后利用二次函数最值问题，求得AE长．【解答】解：〔1〕∵四边形ABCD是正方形，∴OB=OC，∠OBE=∠OCF=45°，∠BOC=90°，∴∠BOF+∠COF=90°，∵∠EOF=90°，∴∠BOF+∠COE=90°，∴∠BOE=∠COF，在△BOE和△COF中，，∴△BOE≌△COF〔ASA〕，∴S四边形OEBF=S△BOE+S△BOE=S△BOE+S△COF=S△BOC=S正方形ABCD=×1×1=；〔2〕证明：∵∠EOG=∠BOE，∠OEG=∠OBE=45°，∴△OEG∽△OBE，∴OE：OB=OG：OE，∴OG•OB=OE2，∵OB=BD，OE=EF，∴OG•BD=EF2；〔3〕如图，过点O作OH⊥BC，∵BC=1，∴OH=BC=，设AE=x，那么BE=CF=1﹣x，BF=x，∴S△BEF +S△COF=BE•BF+CF•OH=x〔1﹣x〕+〔1﹣x〕×=﹣〔x﹣〕2+，∵a=﹣＜0，∴当x=时，S△BEF +S△COF最大；即在旋转过程中，当△BEF与△COF面积之和最大时，AE=．【点评】此题属于四边形综合题，主要考察了正方形性质，旋转性质、全等三角形断定与性质、相像三角形断定与性质、勾股定理以及二次函数最值问题．留意驾驭转化思想应用是解此题关键．25．〔10分〕在数学上，我们把符合肯定条件动点所形成图形叫做满意该条件点轨迹．例如：动点P坐标满意〔m，m﹣1〕，全部符合该条件点组成图象在平面直角坐标系xOy中就是一次函数y=x﹣1图象．即点P轨迹就是直线y=x﹣1．〔1〕假设m、n满意等式mn﹣m=6，那么〔m，n﹣1〕在平面直角坐标系xOy中轨迹是y=；〔2〕假设点P〔x，y〕到点A〔0，1〕间隔与到直线y=﹣1间隔相等，求点P轨迹；〔3〕假设抛物线y=上有两动点M、N满意MN=a〔a为常数，且a≥4〕，设线段MN中点为Q，求点Q到x轴最短间隔．【分析】〔1〕先推断出m〔n﹣1〕=6，进而得出结论；〔2〕先求出点P到点A间隔和点P到直线y=﹣1间隔建立方程即可得出结论；〔3〕设出点M，N坐标，进而得出点Q坐标，利用MN=a，得出16〔k2+1〕〔k2+b〕≥16，即可得出结论．【解答】解：〔1〕设m=x，n﹣1=y，∵mn﹣m=6，∴m〔n﹣1〕=6，∴xy=6，∴y=，∴〔m，n﹣1〕在平面直角坐标系xOy中轨迹是y=，故答案为：y=；〔2〕∴点P〔x，y〕到点A〔0，1〕，∴点P〔x，y〕到点A〔0，1〕间隔平方为x2+〔y﹣1〕2，∵点P〔x，y〕到直线y=﹣1间隔平方为〔y+1〕2，∵点P〔x，y〕到点A〔0，1〕间隔与到直线y=﹣1间隔相等，∴x2+〔y﹣1〕2=〔y+1〕2，∴y=x2；〔3〕设直线MN解析式为y=kx+b，M〔x1，y1〕，N〔x2，y2〕，∴线段MN中点为Q纵坐标为，∴x2=kx+b，∴x2﹣4kx﹣4b=0，∴x1+x2=4k，x1x2=﹣4b，∴=〔kx1+b+kx2+b〕= [k〔x1+x2〕+2b]=2k2+b∴MN2=〔x1﹣x2〕2+〔y1﹣y2〕2=〔k2+1〕〔x1﹣x2〕2=〔k2+1〕[〔x1+x2〕2﹣4x1x2]=16〔k2+1〕〔k2+b〕≥16，∴k2+b≥，∴=k2+k2+b≥k2+=〔k2+1+〕﹣1≥2﹣1=1，∴点Q到x轴最短间隔为1．【点评】此题是二次函数综合题，主要考察了点轨迹定义，两点间间隔公式，中点坐标公式公式，根与系数关系，确定出16〔k2+1〕〔k2+b〕≥16是解此题关键．26．〔10分〕如图1，二次函数y=ax2﹣2ax﹣3a〔a＜0〕图象与x轴交于A、B两点〔点A在点B右侧〕，与y轴正半轴交于点C，顶点为D．〔1〕求顶点D坐标〔用含a代数式表示〕；〔2〕假设以AD为直径圆经过点C．①求抛物线函数关系式；②如图2，点E是y轴负半轴上一点，连接BE，将△OBE绕平面内某一点旋转180°，得到△PMN〔点P、M、N分别和点O、B、E对应〕，并且点M、N都在抛物线上，作MF⊥x轴于点F，假设线段MF：BF=1：2，求点M、N坐标；③点Q在抛物线对称轴上，以Q为圆心圆过A、B两点，并且和直线CD相切，如图3，求点Q坐标．【分析】〔1〕将二次函数解析式进展配方即可得到顶点D坐标．〔2〕①以AD为直径圆经过点C，即点C在以AD为直径圆圆周上，根据圆周角定理不难得出△ACD是个直角三角形，且∠ACD=90°，A点坐标可得，而C、D坐标可由a表达出来，在得出AC、CD、AD长度表达式后，根据勾股定理列等式即可求出a值，由此得出抛物线解析式．②将△OBE绕平面内某一点旋转180°得到△PMN，说明了PM正好和x轴平行，且PM=OB=1，所以求M、N坐标关键是求出点M坐标；首先根据①函数解析式设出M点坐标，然后根据题干条件：BF=2MF作为等量关系进展解答即可．③设⊙Q与直线CD切点为G，连接QG，由C、D两点坐标不难推断出∠CDQ=45°，那么△QGD为等腰直角三角形，即QD2=2QG2=2QB2，设出点Q坐标，然后用Q点纵坐标表达出QD、QB长，根据上面等式列方程即可求出点Q坐标．【解答】解：〔1〕∵y=ax2﹣2ax﹣3a=a〔x﹣1〕2﹣4a，∴D〔1，﹣4a〕．〔2〕①∵以AD为直径圆经过点C，∴△ACD为直角三角形，且∠ACD=90°；由y=ax2﹣2ax﹣3a=a〔x﹣3〕〔x+1〕知，A〔3，0〕、B〔﹣1，0〕、C〔0，﹣3a〕，那么：AC2=〔0﹣3〕2+〔﹣3a﹣0〕2=9a2+9、CD2=〔0﹣1〕2+〔﹣3a+4a〕2=a2+1、AD2=〔3﹣1〕2+〔0+4a〕2=16a2+4由勾股定理得：AC2+CD2=AD2，即：9a2+9+a2+1=16a2+4，化简，得：a2=1，由a＜0，得：a=﹣1即，抛物线解析式：y=﹣x2+2x+3．②∵将△OBE绕平面内某一点旋转180°得到△PMN，∴PM∥x轴，且PM=OB=1；设M〔x，﹣x2+2x+3〕，那么OF=x，MF=﹣x2+2x+3，BF=OF+OB=x+1；∵MF：BF=1：2，即BF=2MF，∴2〔﹣x2+2x+3〕=x+1，化简，得：2x2﹣3x﹣5=0解得：x1=﹣1、x2=∴M〔，〕、N〔，〕．③设⊙Q与直线CD切点为G，连接QG，过C作CH⊥QD于H，如右图；设Q〔1，b〕，那么QD=4﹣b，QB2=QG2=〔1+1〕2+〔b﹣0〕2=b2+4；∵C〔0，3〕、D〔1，4〕，∴CH=DH=1，即△CHD是等腰直角三角形，∴△QGD也是等腰直角三角形，即：QD2=2QG2；代入数据，得：〔4﹣b〕2=2〔b2+4〕，化简，得：b2+8b﹣8=0，解得：b=﹣4±2；即点Q坐标为〔1，﹣4+2〕或〔1，﹣4﹣2〕．【点评】此题主要考察了二次函数解析式确定、旋转图形性质、圆周角定理以及直线和圆位置关系等重要学问点；后两个小题较难，最终一题中，通过构建等腰直角三角形找出QD和⊙Q半径间数量关系是解题题目关键．。

2023年新高考卷仿真模拟卷语文试题及参考答案解析

2023年新高考卷仿真模拟卷语文试题及参考答案解析一、现代文阅读（35分）（一）现代文阅读一（本题共5小题，19分）阅读下面的文字，完成1至5题。

材料一：从东汉末年到魏晋，意识形态领域内的新思潮即所谓新的世界观人生观和反映在文艺、美学上的同一思潮的基本特征，是什么呢？简单说来，这就是人的觉醒。

它恰好成为从两汉时代逐渐脱身出来的一种历史前进的音响。

在人的活动和观念完全屈从于神学目的论和谶纬宿命论支配控制下的两汉时代，是不可能有这种觉醒的。

文艺和审美心理比起其他领域，反映得更为敏感、直接和清晰一些。

《古诗十九首》以及风格与之极为接近的苏李诗（东汉无名氏文人假托李陵所作的三首抒情诗，及假托苏武所作的四首诗，被人们合称为苏李诗），无论从形式到内容，都开一代先声。

它们在对日常时世、人事、节候、名利、享乐等等咏叹中，直抒胸臆，深发感喟。

在这种感叹抒发中，突出的是一种性命短促、人生无常的悲伤。

这种对生死存亡的重视、哀伤，对人生短促的感慨、喟叹，从建安直到晋宋，从中下层直到皇家贵族，在相当一段时间中和空间内弥漫开来，成为整个时代的典型音调。

他们唱出的都是同一哀伤，同一感叹，同一种思绪，同一种音调。

可见这个问题在当时社会心理和意识形态上具有重要的位置，是他们的世界观人生观的一个核心部分。

这个核心便是在怀疑论哲学思潮下对人生的执着。

在表面看来似乎是如此颓废、悲观、消极的感叹中，深藏着的恰恰是它的反面，是对人生、生命、命运、生活的强烈的欲求和留恋。

而它们正是在对原来占据统治地位的意识形态——从经术到宿命，从鬼神迷信到道德节操的怀疑和否定基础上产生出来的。

正是对外在权威的怀疑和否定，才有内在人格的觉醒和追求。

也就是说，以前所宣传和相信的那套伦理道德、鬼神迷信、谶纬宿命、烦琐经术等等规范、标准、价值，都是虚假的或值得怀疑的，它们并不可信或无价值。

只有人必然要死才是真的，只有短促的人生中总充满那么多的生离死别哀伤不幸才是真的。

江苏省盐城市、南京市2024届高三第一次模拟考试语文试题及答案解析

江苏省盐城市、南京市2024届高三第一次模拟考试语文试题及答案解析注意事项:1.本试卷考试时间为150分钟，试卷满分150分，考试形式闭卷；2.本试卷中所有试题必须作答在答题卡上规定的位置，否则不给分；3.答题前，务必将自己的学校、班级、姓名、准考证号用0.5毫米黑色墨水签字笔填写在试卷及答题卡上。

一、现代文阅读(35 分)(一)现代文阅读Ⅰ(本题共5小题，19分)阅读下面的文字，完成1~5题。

什么是龙，确乎是一个谜。

龙像马，所以马往往被呼为龙。

《月令》“驾苍龙”，《周礼·庾人》“马八尺以上为龙”，皆其例。

龙有时又像狗。

《后汉书·孔僖传》“画龙不成反类狗”，所以狗也被呼为龙。

此外还有一种有鳞的龙像鱼，一种有翼的又像鸟，一种有角的又像鹿。

至于与龙最容易相混的各种爬虫类的生物，更不必列举了。

然则龙究竟是个什么东西呢?我们的答案是：它是一种图腾(Totem)，并且是只存在于图腾中而不存在于生物界中的一种虚拟的生物，因为它是由许多不同的图腾糅合成的一种综合体。

因部落的兼并而产生的混合的图腾，古埃及是一个最显著的例。

在我们历史上，五方兽中的北方玄武本是龟蛇二兽，也是一个好例。

不同的是，这些是几个图腾单位并存着，各单位的个别形态依然未变，而龙则是许多单位经过融化作用，形成了一个新的大单位，其各小单位已经是不复个别的存在罢了。

前者可称为混合式的图腾，后者化合式的图腾。

部落既总是强的兼并弱的，大的兼并小的，所以在混合式的图腾中总有一种主要的生物或无生物，作为它的基本的中心单位，同样的在化合式的图腾中，也必然是以一种生物或无生物的形态为其主干，而以其他若干生物或无生物的形态为附加部分。

龙图腾，不拘它局部的像马也好，像狗也好，或像鱼，像鸟，像鹿都好，它的主干部分和基本形态却是蛇。

这表明在当初那众图腾单位林立的时代，内中以蛇图腾为最强大，众图腾的合并与融化，便是这蛇图腾兼并与同化了许多弱小单位的结果。

广东省大亚湾区2024届高三联合模拟(一)语文试题及答案解析

广东省大亚湾区2024届高三联合模拟（一）语文试题及答案解析本卷共10页，23小题，满分150分。

考试时间150分钟。

注意事项：1．答卷前，考生务必将自己的学校、班级、姓名、考场号、座位号和准考证号填写在答题卡上，将条形码横贴在答题卡“条形码粘贴处”。

2．作答选择题时，选出每小题答案后，用2B铅笔在答题卡上将对应题目选项的答案信息点涂黑；如需改动，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。

4．考生必须保证答题卡的整洁。

考试结束后，将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5小题，共19分）阅读下面的文字，完成1～5题。

西汉长安城在秦都咸阳渭南宫室及上林苑的基础上修建起来，后来陆续建设了七座具有卫星城性质之陵邑，汉长安城也成为横跨渭河南北的大都市。

汉长安城大体以安门大街为中轴线。

据考古学者秦建明勘察测量，通过安门大街的中轴线向南延伸至子午谷口，向北延伸至汉高祖长陵两座封土中点、清峪河（也称“清河”）大回转，直至天井岸村天齐祠遗址，总长74千米。

这条基线与真子午线的夹角误差仅为±1度，与我国大地原点仅相差2分经度左右。

隋都大兴城平面近方形，单边城墙约九公里，规模巨大；东西南三面城墙均设三门。

在城市形态与“旁三门”等方面基本符合《考工记》，同时以南北向朱雀大街为轴线，具有“中轴对称”的布局特点。

大兴城由宫城、皇城与外郭城组成，宫城在都城北部正中，东有东宫，西有掖庭宫，如同双翼东西护卫。

皇城位于宫城南面，是宗庙和军政机构所在地，其中太庙与太社位居东南与西南，以符“左祖右社”之制。

郭城正中为朱雀大街，宽达150米，是当时世界城市中最长的中轴线，又称“天街”。

朱雀门东西各有五条街道，沿街的里坊数目东西基本相等。

广东省珠海市2025届高三第一次模拟考试语文试题及答案解析

广东省珠海市2025届高三第一次模拟考试语文试题一、现代文阅读（35分）（一）现代文阅读Ⅰ（本题共5小题，19分）阅读下面文字，完成下面小题。

材料一：追溯人类早期秩序建立的过程，“命名”无疑是其中至关重要的一环。

《释名》云：“名，明也，名实事，使分明也。

”凡事凡物皆须有名，有了名称方可识别归类，此为秩序的开端。

因此，给事物命名在古人看来绝非小事。

《尚书·吕刑》谈及远古时期尧初建社会秩序，派诸官分掌各项事务，大禹命名山川即其中重要举措之一。

反映早期先民观念意识的《山海经》对事物命名也很有兴趣。

《山海经》叙述山林川泽、飞禽走兽以及异域地产，皆用“名曰xx”或“其名曰xx”句式。

如《南山经》的招摇山，“有草焉……其名曰祝余”“有木焉，其名曰迷榖”。

在这种“命名识物”的叙述技法下，花木鸟兽、人种国度——被赋予名号，书中荒诞驳杂的内容因此显得秩序井然。

不仅如此，《山海经》在为事物命名时也表现出早期文化的一些特点。

人类早期对自然声音的辨识力和敏感度极高。

《山海经》一书记载虫鱼鸟兽时经常描摹声音，诸如“其音如狗吠”“音如婴儿”等。

鸟兽跳跃奔伏，物状难辨，故以音别之，专门通过鸟兽本身的叫声给其命名。

在此意义上，命名即为识物。

除了以声音名物之外，还有些物怪依据活动场所来命名，如《庄子·达生》曰：“水有罔象，丘有峷，野有彷徨，山有夔，泽有委蛇。

”这种命名物怪的方式通常没有特指某个固定对象，而是类的称呼，条件限定也欠严密。

这些名称显示出早期先民“命名识物”思维中较为朴素而直接的状态。

即认为“名”与其所指事物差不多对等。

名字确定，“物”的性质、界限方才清晰，此即为重视命名、以辨名来识物的认知模式。

《周礼》论及周王朝设官分职状况，其中职官大都有辨析“名物”的职责。

从内涵来看，周礼之“名物”既有物类自然属性的区分，亦包含抽象伦理象征意义之建构。

如“司服”职掌九种吉服，不同吉服各有相应的使用场合，承载着诸多象征意义。

2023年湖北省黄冈市、孝感市、咸宁市中考物理模拟试题(一)含答案解析

2023 年湖北省黄冈市、孝感市、咸宁市中考物理模拟试题（一）
学校:___________姓名：___________班级：___________考号：___________
一、单选题 1．“估测”是学习物理的一种常用方法，小涛同学在学校作了以下估测，其中数据与实际最符合的是（） A．一个篮球的质量约为 50g B．课桌的高度大约是 78cm C．教室里一盏照明用日光灯正常工作时电流约为 5A D．教室内气温高达 60℃ 2．2021 年 3 月 22 日是第二十九个世界水日，节约用水是每个公民的义务和责任，下图所示水分物体变化，吸放热情况与其他三个不同的是（）
脸识别系统各相当于一个开关，信息符合为开关闭合状态，则下列模拟电路中，符合上
述要求的是（）
A．
B．
C．
D．
二、填空题 9．如图是工人师傅用一把螺丝刀探听电动机内部运转是否正常的做法，该现象说明 ________可以传声；通过听到的声音可以判断电动机内部运转是否正常，这是利用了声音可以传递________（选填“能量”或“信息”）．
A．
冰融水开 B．
雾绕险峰
C．
露润绿叶
D．
霜打枝头
3．2021 年 3 月 9 日，我校举行了“青春梦想，梦想力量”中考百日励志大会，为了记录活动的精彩瞬间，采用了无人机进行拍摄。如图所示是无人机工作时的情景，下列分析正确的是（）
A．无人机在空中向上飞行时，相对于地面是静止的 B．无人机加速向上运动时，它的惯性会变大 C．无人机在空中悬停时，它所受的重力大于空气对它的作用力 D．无人机在空中悬停时，若突然间所受的力全部消失，它将保持静止 4．为了行车安全，很多家用汽车都安装了电子后视镜。电子后视镜通过摄像头成像，将车侧后方的车况呈现在显示屏上，如图所示。关于电子后视镜的成像情况，下列说法

2024年物理模拟考试题及答案解析

2024年物理模拟考试题及答案解析一、选择题（每题2分，共20分）1. 下列哪个物理量是标量？A. 速度B. 力C. 加速度D. 位移{答案：D} 解析：位移只有大小，没有方向，是标量。

2. 一个物体做直线运动，当速度与加速度的方向相同时，物体的速度将如何变化？A. 减小B. 增大C. 保持不变D. 无法确定{答案：B} 解析：根据牛顿第二定律，物体的加速度与作用力成正比，与物体的质量成反比。

当速度与加速度的方向相同时，物体将加速，速度增大。

3. 下列哪个单位是力的单位？A. N（牛顿）B. m/s（米每秒）C. kg（千克）D. J（焦耳）{答案：A} 解析：牛顿是国际单位制中力的单位。

4. 下列哪个物理现象与光的折射无关？A. 眼镜的透镜矫正B. 水中的鱼看起来更浅C. 光纤通信D. 平面镜成像{答案：D} 解析：平面镜成像是光的反射现象，与光的折射无关。

5. 一个物体从静止开始做直线运动，当物体速度达到最大值时，下列哪个物理量不再变化？A. 速度B. 加速度C. 动能D. 动量{答案：B} 解析：当物体速度达到最大值时，加速度为零，物体做匀速直线运动。

二、填空题（每题2分，共20分）1. 物理学中，描述物体位置变化的物理量是______。

{答案：位移} 解析：位移是描述物体位置变化的物理量。

2. 下列单位中，属于能量单位的是______。

{答案：焦耳（J）} 解析：焦耳是国际单位制中能量的单位。

3. 在真空中，光速的数值约为______。

{答案：3×10^8 m/s} 解析：在真空中，光速的数值约为3×10^8 m/s。

4. 下列物理现象中，属于光的折射现象的是______。

{答案：水中的鱼看起来更浅} 解析：水中的鱼看起来更浅是由于光从水中射入空气时发生折射现象。

5. 一个物体做直线运动，当物体速度的方向与加速度方向相同时，物体的速度______。

{答案：增大} 解析：当物体速度的方向与加速度方向相同时，物体将加速，速度增大。

CET4模拟试题(一)参考答案及解析

• M E J H I O • B
• C
L A C D
– 细节题。关键词teachers in the United States – 细节题。关键词catch up with
• A
– 词汇题。根据题干定位在第三段倒数第三句。
• D
– 态度题。
• D
– 主旨题。
• D
– 细节题。根据关键词psychologists
– similar leisure terminal automatically postal check create Oxford – drops a few lines to her mother in New York whenever she is near a terminal – when telephone service is becoming convenient and highly effective people make calls instead of writing letters – E-mailing brings people together and makes the world even smaller
Competition is an essential element in our society. We compete constantly for games, jobs, money, and so on. It is safe to say that competition exists everywhere. Although some people stress competition while others advocate cooperation, there is a close relationship between them. In order to win the game, one team has to compete with the other, and each player has to cooperate with his or her teammates. In most cases, we can’t

2023届河北省唐山市第十一中学高考模拟测试地理试题(一)(含答案解析)

2023届河北省唐山市第十一中学高考模拟测试地理试题（一）学校:___________姓名：___________班级：___________考号：___________一、选择题组陶瓷可以大致分为传统陶瓷和先进陶瓷两类。

先进陶瓷以人工精制合成原料为主，广泛应用于生物医用材料（人工关节、血管支架等）等高精尖领域，国内生物医用材料的70%~80%依赖进口。

山东省淄博市博山区地处泰沂山脉北侧，距今已有6000年陶瓷生产历史，是我国五大陶瓷产地之一。

目前淄博市作为国内先进陶瓷主要集聚区，生物医用材料已成为淄博市陶瓷产业开发的重点。

近年来，淄博市持续推动产业技术创新联盟建设，以产业联盟带动产业发展。

下图为淄博市位置示意图。

据此完成下面小题。

1．影响淄博市成为国内先进陶瓷主要集聚区的主要因素是（）A．市场B．技术C．原料D．能源2．生物医用材料成为淄博市先进陶瓷产业开发的重点的主要原因是我国（）A．城镇化进程加快B．人口老龄化加重C．先进陶瓷技术水平高D．人口数量增长快3．淄博市持续推动先进陶瓷产业技术创新联盟建设的主要目的是（）A．提升创新能力B．降低生产成本C．获得规模效应D．共享基础设施江西流坑村历史悠久，四面环山，村落建设了多条东西向街巷，且该街巷直达河岸；村落西侧挖掘了高低串联的池塘（村民称之为“龙湖”），并与乌江相连；街巷均留有明沟或暗渠，并与“龙湖”相通。

下图为流坑村功能区分布示意图。

据此完成下面小题。

4．威胁流坑村生存的首要因素是（）A．滑坡B．干旱C．地震D．洪涝5．该村东西向街巷的主要作用有（）①防盗②防火③运输④通风A．①②B．①④C．②③D．③④6．该村挖掘高低串联的池塘的目的是（）A．减少工程量B．净化水质C．方便水运D．利于取水下图为新西兰人口金字塔模型图（含预测）。

据此完成下面小题。

7．依据图示信息可知，新西兰人口最可能（）A．1967年停止增长B．2020年增长迅速C．2048年呈负增长D．2048年老龄化初现8．该国应对未来人口问题，最有效的人口政策是（）A．鼓励生育B．放宽移民政策C．提倡优生D．加强人口教育巴斯海峡海水流动受风力影响，具有明显的季节变化。

2023年国考公务员考试《行测》全真模拟试题(一)含解析

2023年国考公务员考试《行测》全真模拟试题（一）一、言语理解与表达练习题（一）1.2008年，中国大地上堪称祸福更替，悲喜交集。

所谓“福”和“喜”，大抵是百年一遇，普照人心，如迎接北京奥运会和残奥会，纪念改革开放30周年;而所谓“祸”与“悲”，则属于________、________。

填入划横线部分最恰当的一项是( )。

A.惊天动地千难万险B.惊涛拍岸山河破碎C.猝不及防石破天惊D.防不胜防有惊有险2.正是由于中国等亚洲国家对日本当时(麦克阿瑟统治期)比现在问题更严重的历史教科书________，错失了________影响的最佳时机，新一代日本人长成了，问题才更________了。

依次填入划横线部分最恰当的一项是( )。

A.熟视无睹实行复杂B.沉默不语实行棘手C.沉默不语施加棘手D.熟视无睹施加复杂3.我无法不老，但我还有可能年轻，我不敢对我们过于庞大的文化有什么祝祈，却看完自己笔下的文字能有一种________后的回味、焦灼后的会心，冥思后的放松、苍老后的年轻，当然，希望也只是希望罢了，何况这实在已是一种。

填入横线部分最恰当的一项是( )。

A.苦涩奢望B.辛酸奢求C.历练幻想D.风雨梦境4.依次填入下列横线处的词语，最恰当的一组是( )。

________国防和军队改革，________军事战略指导，________现代军事力量体系。

A.完善深化加强B.深化完善加强C.加强深化完善D.深化加强完善5.水污染的形势是严峻的，而尤其使我们________的是，当前工业发展的步伐是不可能停下来的。

依次填入划横线处最恰当的一项是( )。

A.畏首畏尾B.骑虎难下C.进退维谷D.瞻前顾后6.在这阴冷的四月里，奇迹不会发生，任凭游人扫兴和诅咒，牡丹依然_________。

它不苟且、不俯就、不妥协、.不媚俗，它遵循自己的花期自己的规律，它有权为自己选择每年一度的盛大节日。

填入黄横线部分最恰当的一项是( )。

A.泰然处之B.安之若素C.我行我素D.岿然不动7.风水在古代其实包含有很深的科学成分，“依山而建，帮谁而居”.“面南背北，坐北朝南”几千年流传下来，若非其有着极强的_________价值，也不会至今依然被建筑商和民间如此_________。