2019年成都七中2020届高三半期考试(高清)

成都七中高 2024届高三上期期末考试理科综合考试时间:150 分钟 满分:300 分本试卷分选择题和非选择题两部分。

第I 卷(选择题)，第Ⅱ卷(非选择题)注意事项:1.答题前，务必将自己的姓名、考籍号填写在答题卡规定的位置上。

2.答选择题时，必须使用2B 铅笔将答题卡上对应题目的答案标号涂黑，如需改动，用橡皮擦擦干净后，再选涂其他答案标号。

3.答非选择题时，必须使用0.5毫米黑色签字笔，将答案书写在答题卡规定的位置上。

4.所有题目必须在答题卡上作答，在试题卷上答题无效。

5.考试结束后，只将答题卡交回。

可能用到的相对原子质量:H-1C-12N-14O-16Na-23P-31Cl-35.5Fe-56Ni-59第I 卷(共126分)一、选择题:本题共13个小题，每小题6分。

共78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.真核细胞中存在许多由蛋白质与其他物质结合而形成的结构。

下列相关叙述错误的是A ．蛋白质与某些无机盐离子结合后可完成物质运输B ．蛋白质与糖类的结合物可参与细胞间的信息交流C ．蛋白质与DNA 结合后可参与DNA 复制或转录D ．蛋白质与RNA 的结合物可作为遗传物质的主要载体2.高中生物学实验中常涉及有关“分离”的描述。

下列叙述正确的是A.高等植物根尖分生区细胞分裂过程中，会发生同源染色体分离B ．观察DNA 和RNA 在细胞中分布实验中，盐酸使染色质中的DNA 和蛋白质分离C ．进行密度梯度离心操作后根据放射性大小可将14N-DNA 和15N-DNA 进行分离D ．绿叶中色素的提取和分离实验中，根据色素在滤液中的溶解度不同将色素分离3.内质网中钙离子浓度过高时，某种跨膜蛋白T 感知钙离子浓度的变化后形成具有活性的钙离子载体，将内质网中的钙离子排出，当内质网中钙离子下降至正常水平后，钙离子载体失活。

据此推测合理的是A ．内质网中钙离子浓度的调节属于正反馈调节B ．内质网通过跨膜蛋白T 释放Ca 2+的过程需要消耗ATPC ．Ca 2+作为信号分子调节内质网中跨膜蛋白T 的活性D ．跨膜蛋白T 双向运输Ca 2+从而实现内质网中Ca 2+的摄取和释放4.人的饥饿感和饱腹感受到胃饥饿素和瘦素调控，二者分别由胃底黏膜中的部分细胞、脂肪组织细胞分泌产生。

成都七中2025届高三年级入学考试卷考试时间：75分钟总分：100分可能用到的相对原子质量：H-1；C-12；N-14；O-16；Ge-73一、选择题：本题共14小题，每小题3分，共42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。

1．2024巴黎奥运会是属于全人类的盛事，下列说法不正确的A．吉祥物材质聚酯纤维属于无机高分子B．奖牌中来自埃菲尔铁塔的碎片属于无机金属材料D．工作制服材料属于有2．下列离子方程式中，错误．．的是A．Na放入水中：2Na+2H2O=2Na++2OH—+H2↑B．过量CO2通入石灰乳中：CO2+OH—= HCO3—C．Al2O3放入NaOH溶液中：Al2O3+2OH—=2AlO2—+H2OD．Fe放入Fe2（SO4）3中，Fe+2Fe3+=3Fe2+3．下列叙述正确的是A．常温下浓硫酸分别与Fe、Cu反应，生成的气体相同B． NaOH溶液分别与NO2和CO2反应，反应的类型相同C． Na2O2分别与CO2、SO2反应，生成产物不同D．冶炼金属Mg和Al，电解熔融物的类别都属于盐酸盐4．我国四大发明黑火药反应原理：S+2KNO3+3C=K2S+N2↑+3CO2↑，N A为阿伏加德罗常数的值，当生成1molK2S时，下列叙述错误．．的是A．转移电子数为12N AB．生成的N2质量为28gC．生成的还原产物为2molD．生成的CO2含有孤电子对数为2N A9．一种离子液体的结构如图所示，已知阳离子中五元环上的原子处于同一平面。

下列说法不正确．．．的是 A ．该物质中所有原子均达到了-8e 稳定结构B ．阳离子中存在π56C ．阴离子空间构型为正八面体D ．该物质的晶体属于离子晶体10．PCl 3发生水解反应的机理如下图。

下列说法正确是A ．PCl 3为非极性分子B ．H 3PO 3中P 为sp 3杂化C ．PCl 3的水解产物H PO 33为三元酸D ．HPOCl 2和H PO 33均能形成分子间氢键11．25℃时，向Na C O 224溶液中滴入盐酸，混合溶液的pOH 与-lgX 的变化关系如图所示。

成都七中高2019届高三（上）半期英语考试题考试时间：120分钟试题满分：150分本试卷分第一卷（选择题）和第二卷（非选择题）两部分。

第一卷第1至11页，第二卷第12至13页，全卷共13页。

第一部分英语知识运用（共两节，满分40分）第一节单项填空（共10小题；每小题1分，满分10分）从A、B、C、D四个选项中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

1. With the popularity of ______ cell phone, more and more people are addicted to it and do less and lessface-to-face communication, which has become _______ widespread concern.A. the; aB. \; \C. the; \D. a; the2. It’s a consensus in modern society that whoever breaks the law deserves _______, whether he is from thetop class or a humble person.A. to punishB. to be punishingC. being punishedD. punishing3. I recognized him _______ I saw him, though we had been apart for over a decade.A. as soonB. at onceC. the instantD. the first time4.It’s evident that the Chinese Football Team hasn’t yet found a style that _______ them. You see, theycan’t even beat such a weak team as Indonesia.A. matchesB. suitsC. fitsD. agrees5. It was not until the teacher had explained it three times _______ how to work out the problem.A. did he understandB. had he understoodC. that he understoodD. that he didn’t understood6.—What do you think was the highlight of your school life?—_______.A. When I had won championship in the school sports meetingB. Having got the first place in a formal English examinationC. Named the Prom Queen at the graduation promD. That I was chosen to participate in the national physics contest7. Varieties of after-class activities _______ to enrich students’school life are held on Friday afternoonevery other week in our school.A. intendedB. aimedC. plannedD. scheduled8. Unlike many other boys of his age who are often addicted to PC games, he is _______ on outdooractivities in the mountains.A. eagerB. starvingC. keenD. fond9. Japan’s economy _______ in the past twenty years. No one knows how long it ______ before it regainsits increase.A. has been declining; will beB. has declined; would beC. had been in decline; would takeD. was on the decline; will take10. —Do you think our teachers will free us of homework today? This year’s sports meeting startstomorrow.—______. After all, we are already Senior 3 students.A. No problemB. Forget itC. No dreamD. I hope so第二节：完型填空（共20小题；每小题 1.5分，满分30分）阅读下面短文，从短文后所给各题的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

2020届成都七中高三语文月考试题及答案解析一、现代文阅读（36分）(一)现代文阅读I(9分)阅读下面的文字，完成下面小题。

小学教师[法]巴比塞天气很热，可以听见苍蝇在飞。

除了苍蝇嗡嗡地叫之外，还有一种有节奏的、单调的嘈杂的低语声传到墙外。

这是一所小学，这所小学的内部和世界上所有的小学内部一样：一排排黑色的小书桌，许多个小脑袋也是黑的(在桌子的方形上露着小脑袋的圆形)在这些中间，一个男子好似巨人样出现在那儿：那是小学教师。

像世界上所有的小学教师一样，他施展着出奇的技巧和耐心，以吸引和集中三十个小脑袋的注意力，并要把现实世界的广阔形象往这些小脑袋里面灌输一部分。

这位小学教师名叫巴多梅罗·佐里。

他是一个安详，淳朴而又温和的人。

全村人都说他认真仔细，在村子这狭小的圈子里，他那严格守时的习惯人人称暖。

要是万一他上课迟到，人们就会下这样一个结论：那一定是时钟跑快了。

他在思想上也像在生活上一样以严正的态度要求自己。

他的一些主张并非是大家都欢迎的，特别是那些有关于团结与合作的主张。

所以有些人说他是一个赤色分子，有些人在他们内心里，在他们那可怜的奴隶的内心里感到奇怪：一个人竟然同时又是赤色分子，又这样诚实。

但就是这些人也不禁对巴多梅·佐里肃然起敬。

卡瓦达的两位重要人物，两位穿黑袍的人，神甫和他的助理，他们却别有看法。

他们挑不出一点可以攻击小学教师的地方——除了他对于自由以及大众福利的魔鬼般的见解之外——因此就越发怀恨他。

神甫和神甫助理监视着小学校——这是塑造下一代的车间。

假如要想掌握未来，就应当先把学校抓在自己手里。

神甫和他的影子——神甫助理对这个过于诚实、过于独力自主的小学教师怀有不共戴天之仇——特别是由于小学教师得到大家的同情，他的危险性也就愈大。

然而因为在他的行为和言论中找不到一点真正具有破坏性的东西，那就得想别的办法来整他了。

在今天这个不幸的西班牙，教士们有权闯进学校，监视教学活动。

2019-2020学年成都七中高三英语期中考试试题及答案第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项APlan Your Visit to the British MuseumWe've made a few changes to ensure you can safely enjoy your visit:How to book tickets·Tickets for the permanent collection can only be hooked online in advance.·To book tickets for exhibitions, visit our exhibition pages. If you want to guarantee your visit to the permanent collection as well as the exhibition on your visit, you will need to book a separate ticket.·We are limiting numbers of people in the museum to ensure there is room for you to safely enjoy your visit. Everyone, including members and volunteers, will therefore need to book a free, timed ticket in advance.Important information about your ticket booking·You can book up to six tickets for people who live in the same family.·We will email yourticket to you, and you will need to show it either printed out or on your device (设备) when you arrive.·Please arrive at the time stated on your ticket-we cannot guarantee admission before or after it.Following the routeWe have created a new one-way route through the museum which will allow you to safely explore world cultures from the Mediterranean to the Middle East and from the Americas to Africa.·View a map of the route (Open in a new window).·Our audio guides (音频指南) are not available. However, youcan pay to download the audio introductions from iTunes (Open in a new window) or Google Play (Open in a new window) to each of the galleries and listen on your own device. Please remember to bring along your own headphones.1.Why does the museum offer timed tickets?A.To earn more money.B.To hire more volunteers.C.To save room for collections.D.To control the number of visitors.2.How can a visitor learn about the new route in advance?A.View an online map.B.Buy a new headphone.C.Buy audio guides from the museum.D.Download video introductions from iTunes.3.Where can you probably find the text?A.In a newspaper.B.In a magazine.C.On a website.D.In a report.BOne day, when I was working as a psychologist（心理学家）in England, an adolescent boy showed up in my office. It was David. He kept walking up and down restlessly, his face pale, and his hands shaking slightly. His head teacher had referred him to me.“This boy has lost his family,” he wrote. “He is understandably very sad and refuses to talk to others, and I’m very worried about him. Can you help?”I looked at David and showed him to a chair. How could I help him? There are problems psychology doesn’t have the answer to, and which no words can describe. Sometimes the best thing one can do is to listen openly and sympathetically（同情）The first two times we met, David didn’t say a word. He sat there, only looking up to look at the children’s drawings on the wall behind me. I suggested we play a game of chess. He nodded. After that he played chess with me every Wednesday afternoon---in complete silence and without looking at me. It’s not easy to cheat in chess, but I admit I made sure David won once or twice.Usually, he arrived earlier than agreed, took the chess board and pieces from the shelf and began setting them up before I even got a chance to sit down. It seemed as if he enjoyed my company（陪伴）. But why did he never look at me?“Perhaps he simply needs someone to share his pain with,” I thought. “Perhaps he senses that I respect his suffering.” Some months later, when we were playing chess, he looked up at me suddenly.“It’s your tum,” he said.After that day, David started talking. He got friends in school and joined a bicycle club. He wrote to me a few times, about his biking with some friends, and about his plan to get into university. Now he had really started to live his own life.Maybe I gave David something. But I also learned that one…without any words---can reach out to another person. All it takes is a hug, a shoulder to cry on, a friendly touch, and an ear that listens.4. When he first met the author, David .A. felt a little excitedB. looked a little nervousC. walked energeticallyD. showed up with his teacher5. David enjoyed being with the author because he .A. wanted to ask the author for adviceB. liked the children’s drawings in the officeC. beat the author many times in the chess gameD. needed to share sorrow with the author6. What can be inferred about David?A. He liked biking before he lost his family.B. He recovered after months of treatment.C. He went into university soon after starting to talk.D. He got friends in school before he met the author.7. What made David change?A. The author’s silent communication with him.B. His teacher’s help.C. The author’s friendship.D. His exchange of letters with the author.CVolunteer DayWhat better way is there to enjoy your own hobbies while helping others at the same time? Come to Volunteer Day and choose which activity you’d like to join for the day. See below for a schedule of events on Volunteer Day.Volunteer Day schedule:7:30am.: Meet at the Community (社区) Center for juice and bagels.8:00—8:30 a.m.: Choose which activity you’d like to help with for the day.8:30 a.m.: Board the bus to your activity site.9:00 a.m.—3:30 p.m.: Work as a volunteer.3:30 p.m.: Board the bus that will take you back to the Community Center.See below for a list of volunteer opportunities for Volunteer Day so you can begin thinking about which activity you might want to join.A list of volunteer activities:Paint houses: Do you enjoy making art? If so, this volunteer opportunity might be just right for you! Happy Homes is a local organization that provides home repairs for needy people in the form of painting. For elderly or physically disabled people who cannot do repairs to their homes, Happy Homes provides volunteer painters to repaint old homes; outside or in. Happy Homes also provides painters to create beautiful wall paintings inside schools or community centers.Plant flowers: Do you enjoy being outside in nature? City Parks Association has many great opportunities for people who love to be outdoors. Help plant flowers and bushes in city parks; help lay paths at Cave Springs Park, or help pick up rubbish around the river banks. These activities are very active, so remember to be prepared with plenty of drinking water!Read to children: Do you enjoy working with young children? Do you like books? Love and Learning is an organization that provides volunteers to help children with learning disabilities. Read books out loud to groups of children four to six years old, or read one-on-one with struggling readers seven to eight years old.Play with animals: Do you love animals? Lovely Friends is an organization that visits local animal shelters and provides volunteers to spend time with the animals while their cages are being cleaned. Play with puppies, snuggle with cats, or hand-feed rabbits.8. At what time do volunteers leave for their activity sites?A. 7:30 a.m..B. 8:00 a.m.C. 8:30 a.m.D. 9:00 a.m.9. An outdoor lover probably takes part in ______.A. Plant flowersB. Paint housesC. Read to childrenD. Play with animals10. What do Lovely Friends volunteers do?A. Read books to children.B. Spend time with animals.C. Help plant bushes in parks.D. Pick up garbage along the river.11. The purpose of the passage is to _________.A. educate childrenB. attract volunteersC. comfort the elderlyD. encourage the disabledDWhat will future schools look like in 100 years? Imagine future schools in which students are totally engagedin a class. They are concentrating on working together to solve real-world problems. They are self-driven and are coming up withamazing ideas on the spot. They are concerned with each other’s well-being as part of a team. Their concerns reach far beyond the classroom to others all over the globe.The school of the future will be an amazing melting pot of different peoples coming together to solve real-world problems.Will they even be called “schools” in the future?The teacher-student relationship is changing. Teachers are acting more as helpers rather than keepers of all knowledge. Students are driving their own education to the path that they feel best fits them. In the future, employers may not be as concerned with a diploma. They’ll look more at cases and examples of how students contribute to solving real-world problems. They’ll want to know how well they work in a team.What will problem-solving look like in the future?Information from the Internet is accessible everywhere and at unimaginable speeds. Kids are connected to news around the world in real time. Imagine someone could put out a request to the global community to help solve an issue in their own community! Classes can adopt an issue and work with other classes around the world in real time to create solutions.What will information look like in the future?It’s already everywhere. Users can get flooded by the constant flow of information. The need to understand what is true and what is not is important. The flipped classroom (翻转课堂) has already completely changed lecture-based lessons. It presents interesting content to students before they even come to class. They can access the Internet as many times as they want to review the lessons.12. What is the key message of the first paragraph?A. The things students will do in the future school.B. The situation where students will be in the future.C. The attention students will pay to in the classroom.D. The methods students will use to study in the classroom.13. What will be thought highly of when students solve real-world problems?A. Respect.B. Patience.C. Teamwork.D. Concern.14. What can we infer from the fourth paragraph?A. Teachers encourage students to develop leadership.B Students are really relaxed with their heavy study.C. The employers value students’ diplomas most.D. Students have the right to choose the most suitable lessons.15. What’s the purpose of the flipped classroom?A. To help students to improve the problem-solving ability.B. To provide the lessons for students to study before or after class.C. To help students to keep in contact with the outside world.D. To help students to understand the most difficult content.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

成都七中2018-2019学年度上期高2019届半期考试英语试卷考试时间：120分钟满分：150分注意事项：1. 答卷前，考生务必将自己的姓名、准考证号填写在答题卡上。

2. 作答时，务必将答案写在答题卡上，写在本试卷及草稿纸上无效。

3. 考试结束后，将本试卷和答题卡一并交回。

第Ⅰ卷第一部分听力（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. How was the weather this afternoon?A. Clear.B. Cloudy.C. Windy.2. Why can’t the man hear the announcers?A. The sound is turned off.B. They are speaking softly.C. The woman is talking on the phone.3. How much is the shirt?A. $1.B. $3.C. $4.4. What was the woman’s opinion of Thailand?A. The food was great.B. The weather was bad.C. The people were friendly.5.What is the man doing?A. Getting dressed.B. Supporting the woman.C. Preparing the woman for an interview.第二节（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。

2019-2020学年成都七中高三英语上学期期中考试试题及答案解析第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项AStaying-at-home proves to be effective in slowing the spread of the virus, but loneliness can be tough for many. Luckily, in the age of social media, we are never truly alone. And with the extra time spent indoors, artists are stepping up to help us all with the following clubs.Drawing from Distance by Sarah Beth MorganLet’s shine some light during this trying time and encourage social distancing! I’m starting this tomorrow myself — but from what I offer, take whatever you please. No rules! Just have fun!Stayathome Art Club byCarsonEllisHello! I’ll be posting art homework here every weekday morning when I can. They’ll be designed for kids and grownups alike. Here is your first homework: Draw a picture of yourself from the shoulders up. You can follow some useful examples. If you want to share or see other people’s self-picture, use these hashtags: #Stayathomeartclub# QACselfportrait30-Day indoor Art by Danielle KrysaOne month of avoiding crowds? I’m in! I challenge you to use this time inside to make one piece every day from now until mid April. Please join me in playing around with some painting ideas that have been rolling around in my head but haven’t found their way onto paper yet. Stay at home, make art, save someone’s life.DIY from Illustoria MagazineWe have been so inspired to see our community come together to provide easy art projects for families during this stay-at-home-time! DIY is actually a fantastic way tosparkyour imagination without breaking a sweat. A video every day will teach you how to DIY something.1. What do we know about Sarah Beth Morgan?A. She is a strict artist.B. She aims at training more artists.C. She prefers to work at home office.D. She will provide a wide range of choices.2. What are you expected to do if you join Stayathome Art Club?A. Hand in homework every day.B. Share other people’s pictures.C. Draw a picture of yourself.D. Show up in person occasionally.3. What does “spark”in the last paragraph probably mean?A. Set off.B. Set down.C. Set aside.D. Set about.BMany of us in China enjoy adding chilies (辣椒) toour food, but did you know that this spicy vegetable could also be dangerous? A 34-year-oldUSman recently ended up in hospital after eating a Carolina Reaper—the spiciest chili in the world. After taking just a single bite of one, the man suffered from serious headaches in the following few days, reported BBC News.In fact, reports of stomachache and headache caused by eating spicy food are not something unusual. But if chilies are harmful, why is it that human beings are the only animals to eat this vegetable? According to the website Huanqiu, about 600 million Chinese people—almost half of the national population—are chili eaters. So what makes people love chilies so much? The human body reacts to the burning feeling that comes from eating chilies by releasing natural chemicals that “produce a sense of happiness” , noted BBC News.And the benefits go even further than just personal enjoyment. A survey conducted by the Chinese Academy of Medical Sciences found that the death rate of those who eat spicy food once or twice a week is 10 percent lower than those who eat it less than once a week. The number decreased to 14 percent for those who eat spicy food six to seven times a week. And another study done by theUniversityofVermontcame to a similar conclusion. “The data encourages people to eat more spicy food to improve health and reduce death risk at an early age,” Liu Qi, a nutritionist at the Harvard TH Chan School of Public Health, told BBC News.Chilies have anti-cancer quality and the ability to increase our metabolism (新陈代谢). So, don't worry if you love spicy food. It seems that chilies are actually good for us—except for the Carolina Reaper, perhaps.4. The example of a 34-year-old American is mentioned in Paragraph 1 to prove ________.A. chiliescan be beneficialB. chilies are popular inAmericaC. chilies can be dangerousD. serious headaches can be dangerous5. Eating chilies gives people a sense of happiness by_______.A. decreasing death rateB. releasing natural chemicalsC. curing serious headachesD. providing enough nutrition6. Which of the following statement is TRUE?A. Human are the only animals to eat chilies.B. Stomachache and headaches caused by chilies is something unusual.C. The more chilies you eat, the healthier you are.D. Chilies have anti-cancer quality but it can't increase our metabolism.7. The writer wrote the passage to ________.A. warn people of the dangers of chiliesB. ask people to eat Carolina ReaperC. encourage people to eat more chiliesD. tell people the benefits of chiliesCIt's the near future.Animal populations have fallen sharply and 80% of species are extinct.The forests are so rare that you need to make a booking to visit one. Birds also face extinction.The Arctic terns,a species evolved to fly across the world on4000kmannual journeys，are on their last migration (迁徙) to Antarctica.The Last Migrationby the Sydney-based writer Charlotte McConaghy is a different sort of climate novel，one in which the heroine's(女主人公)damaged soul is as much a story as the damaged environment This is McConaghy's first work of literary fiction,after a history publishing in science fiction and a romantic fantasy series."I wanted to try and engage with the climate crisis closely,"she said."It's hard to nail down where he book came from.But I had Toni Morrison's words in my head:'If there's a book you really want to read,but i hasn't been written yet,then you must write it.'I love that. It really speaks to me.""I wanted to write about the way the natural world is disappearing but I didn't know a way in."The way in”, she says, was to"go travelling.I went to Ireland and Iceland,and thought about these incredible journeys of the terns and these people who study hes journeys."The book became a story of a double journey: the migration of the birds,and a broken woman's travelling to the end of the earth.Much of the book is told in flashbacks, the action jumping between the south coast of New South Wales to the west coast of Ireland and to Greenland."I've always been fascinated with Ireland: the landscape, the people and the poetry and music.I was fascinated with writing a character from there. It was a way to connect more with the place."McConaghy says she also wanted to have a character who was"of two places"."I had lived in 21 houses by the time I was 21, as a result I definitely know how it feels to feel as if you are not sure where you belong and feeling as if you are between two worlds."8. How isThe Last Migrationdifferent from other climate novels?A. It forecasts environmental destruction.B. It features a bird's cross-continental migration.C It combines science fiction well with romantic fantasy.D. It attaches equal importance to the heroine's broken soul.9. What did McConaghy think of Toni Morrison's words?A. Inspirational.B. One-sided.C. Authoritative.D. Casual.10. Why did McConaghy go travelling?A. To appreciate the landscape of Ireland.B. To follow the migration of the birds.C. To get away from her tiresome life.D. To find ideas for her new book.11. How might a character "of two places"feel?A. Content and carefree.B. More connected with nature.C. Lacking in a sense of belonging.D. Knowledgeable about the world.DThe China International Search and Rescue Team(CISAR) was formed in 2001 and is now made up of several hundred rescue workers and about 20 police dogs. The team brings help and hope to those whose lives are changed by astorm, flood, earthquake, or any other natural disasters.After long and careful training, the team went on its first international rescue tasks in 2003. That year, the Chinese team helped save lives after earthquakes inAlgeriaandIran. It was the first time that a Chinese team had worked outsideChinawhose members won high praise for bravery and skill.Since then, the CISAR has completed many tasks. The list of people to whom help has been given is long. The team treated more than 3,000 people who were wounded in the 2006 earthquake inIndonesia, helped 2,500 wounded people after the earthquake that hitHaitiin 2010, and spent several months giving aid to over 25,000 people suffering from the 2010 floods inPakistan. On April 26, 2015, a group of 62 people from CISAR went toNepalafter the 8.1 magnitude earthquake that happened there.Rescue workers are trained to find people, treat wounds, and hand out food, water, and other supplies. Theyhave to be able to do work that is difficult under conditions which can be very dangerous. After a disaster, there is usually no electricity or water, and there may be diseases and other dangers. Rescue workers get to save lives, but they must also bury the dead. That means they have to be strong in both body and mind.Rescue workers must have big hearts, too. It takes a lot of love and courage to risk one’s own life to save someone else’s. The members of the CISAR have plenty of both and are always ready to go wherever help is needed.12. What is the function of the numbers in Paragraph 3?A. To advertise for the CISAR.B. To add some basic information.C. To praise Recue Workers’ contributions.D. To stress the dangers Rescue Workers face.13. What is the author’s attitude towards Rescue Workers?A. Hopeful.B. Respectful.C. Curious.D. Supportive.14. What are the last two paragraphs mainly about?A. The duty rescue workers must perform.B. The qualities rescue workers must own.C. The difficulties rescue workers must go through.D. The willingness rescue workers should require.15. What may be the best title of the passage?A. China to the RescueB. How to train CISARC. Welcome to CISARD. Rescue on request第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

2019-2020学年成都七中高三英语期中考试试卷及参考答案第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项AVienna Concerts 2021Every day, one to three dozen Vienna concerts are staged. You can use this checklist to find a fantastic Vienna concert that is worth its money.Vienna Chamber OrchestraThe Vienna Chamber Orchestra has existed for more than 70 years. The international reputation of the Vienna Chamber Orchestra is documented by worldwide tours. The length is 65 minutes.Date: 20th JuneLocation: Minoritenkirehe, Minoritenplatz 1, 1010 ViennaTickets: 30 Euros per adult and free admission for childrenVienna Philharmonic OrchestraIn 2021, famous conductor Gustavo Dudamel will lead the Vienna Philharmonic Orchestra. Expect an amazing show with top quality classical music and fireworks. The concert lasts one and a half hours. You have to arrive at least 20 minutes early to find a place to sit.Date: 4th and 5th OctoberLocation: Schonbrunn Palace, palace gardens, in front of Naptune fountain, Schonbrunner Schlossstrasse 47, 1130 Vienna.Tickets: 30 Euros（students, children and senior citizens will receive a 10% discount per ticket）Mozart Piano Sonatas（奏鸣曲）On Saturdays and Sundays, the St. Peter’s church opens its basement to a small group of Mozart fans. In simple but elegant surroundings, international pianists perform Mozart piano sonatas on a Steinway piano. The concerts start in the early evening and last 90 minutes.Date: throughout the yearLocation: St. Peter’s basement, Petersplatz 1, 1010 ViennaTickets: 29 Euros for adults and 16 Euros for children between 8 and 14（children below 8 can enterfor free.）Vivaldi: The Four SeasonsTo point out Vivaldi’s connection to Vienna, the Italian violinist lived in the city for some time, and eventually died there. Closer to where he was buried, the church St. Charles Borromeo regularly stages The Four Seasons, Vivaldi’s main work. The concerts start at 8:15 pm on weekends and last 60 minutes. People can arrive and enter anytime during the performance.Date: throughout the yearLocation: Church St. Charles Borromeo（Karlskirche）, Kreuzherrengase 1, 1040 ViennaTickets: 25 Euros for all ages（free cancellation 24 hours before the event）1.For a couple with their 10-year-old child, which is the cheapest?A.Mozart Piano Sonatas.B.Vienna Chamber Orchestra.C.Vivaldi: The Four Seasons.D.Vienna PhilharmonicOrchestra.2.What do the Vienna Philharmonic Orchestra and Mozart Piano Sonatas have in common?A.They last one and a half hours.B.They are held in closed surroundings.C.They offer a discount for students and the aged.D.They are suitable for people who prefer pop music.3.What can we know about the concert—The Four Seasons?A.It forbids people to enter after 8:15 pm.B.It describes Vivaldi’s stories related to Vienna.C.It allows you to return your ticket for free a day in advance.D.It was created by the Church St. Charles Borromeo to memorize Vivaldi.BAs I work in theLarkwhistle Garden in Dyer's Bay, Ontario, I take my time and the garden is teaching me about working with the earth. I recognize that there will be both successes and failures and there are many variables(变量)that affect them both.The quality of the seeds planted has a bearing on how the plants will grow. The weather can be too hot, too cold, or exactly right, and usually varies between all three. Weeds seem to grow in the garden and need to be taken care of, pulled, and removed to ensure they do not eat into the fruits, vegetables, and flowers we have so lovingly planted.I take time to stand back and rest, and to observe the plants and how they are growing. Each plant is unique and develops in the way that is best for them. Some have large broad leaves to shadow their fruit from the severerays of the sun, while other plants are more open, their fruit needing the light to grow and ripen.Getting my hands dirty, feeling the sweat on my forehead, and the strength and flexibility of my body as I dig, bend and work under the warm summer sun, reminds me I am alive in ways I would not have remembered sitting on the couch.It is attractive to move things around, to transplant, and to disturb the natural order of how plants grow. The garden teaches me that it is important to know when to disturb things and when to let them be. The garden's life cycle follows a pattern that is repeated according to laws of nature, birth, growth, and then dies and it teaches us to accept this fact.4. How many variables may affect the growth of plants in the garden?A. Two.B. Three.C. Four.D. Five.5. What can we learn about the author?A. He feels exhausted while gardening.B. He enjoys life from working practice.C. He takes pleasure in harvesting fruits.D. He dreams away his time in the garden.6. How is the garden tended by the author?A. Its rank grass is got rid of.B. Its plants are left to grow freely.C. Its temperature is controlled properly.D. Its plants with large broad leaves are cut off.7. What fact does the author learn from gardening?A. Life takes its course.B. Hard work benefits health.C. Time is short and precious.D. Gardening brings good harvest.CIf there is no difference in general intelligence between boys and girls, what can explain girls’ poor performance in science and math?It hasbeen suggested that girls do not take math courses, not because they are difficult, but for social reasons. Girls do not want to be in open competition with boys because they are afraid to appear less feminine (女性的) and attractive (有魅力的).However, there are still more high-achieving boys than girls when taking math exams. This difference appears to be worldwide. Biological explanations have been offered for this, but there are other explanations too.Perhaps the difference which comes out during the teenage years has its roots in much earlier experiences. From their first days in kindergarten, boys are encouraged to work on their own and to complete tasks. Facts show that outstanding mathematicians and scientists have not had teachers who gave answers.Besides, there can be little doubt that teachers of math and science expect their boy students to do better at these subjects than their girl students. They even appear to encourage the difference between boys and girls. They spend more time with the boy students, giving them more time to answer questions and working harder to get correct answers from them. They are more likely to call on boys for answers and to allow them to take the lead in classroom discussion. They also praise boys more frequently. All of this seems to encourage boys to work harder in science and math and to give them confidence that they are able to succeed.Such a way of teaching is not likely to encourage girls to take many math and science courses, nor is it likely to support girls who do. When it comes to these subjects it seems certain that school widens the difference between boys and girls.8. Why does the author raise a question in paragraph 1?A. To find differences between boys and girls.B. To explain the poor performance of girls.C. To ask readers a question.D. To introduce the topic.9. The text mainly discusses ________ reasons for the difference between boys and girls in scientific achievements.A. biologicalB. personalC. socialD. historical10. What does the text say about great mathematicians?A. Their teachers did not offer answers to them.B. They started learning math at an earlier age.C. They showed mathematical abilities in their teenage years.D. Their success resulted from their strong interest in math.11. The author would probably agree that ________.A. boys and girls learn in the same wayB. boys and girls are equal in general intelligenceC. girls are more confident in themselves than beforeD. girls should take fewer science courses than boysDOne weekend I went toBuffaloto talk at a writers' conference organized by a group of women writers. The women were serious about their writing skills, and the articles they had written were solid and useful. They asked me to take part in a radio talk show earlier in the week to publicize the conference-they would be with the host in the studio and I would be on a telephone linking from my apartment inNew York.The appointed evening arrived, and my phone rang, and the host came on and greeted me. He said he had three lovely ladies in the studio with him and he was eager to find out what we all thought of the present state of literature and what advice we had for all his listeners who were members of the literati and had literary ambitions themselves.This hearty introduction dropped like a stone among us, and none of the three lovely ladies said anything, which I thought was the proper response.The silence lengthened, and finally I said, “I think we should stop mentioning the words literature and literary and literati. We're here to talk about the skills of writing.” Iknew that the host had been given information about what kind of writers we were and what we wanted to discuss. But he had no other preparation. "Tell me what insights do you have about the literary experience inAmericatoday?” Silence also greeted this question.He didn’t know what to do with that, and he began to mention the names of authors like Ernest Hemingway and Saul Bellow and William Styron, whom we surely regarded as literary giants. We said those writers didn't happen to be our models, and we mentioned people like Lewis Thomas and Joan Didion and Gary Wills, whom he hadn't heard of. We explained that these were writers we admired. “But don't you want to write anything literary?” our host said We were speechless.It was one of the all-time upset radio talk shows.12. What do we know about the talk show?A. It was organized by women writers.B. It was publicized at the conference.C. The author went toBuffaloto take part in it.D. The author participated in it inNew York.13. What does the underlined sentence in paragraph 2 mean?A. The introduction struck us heavily with a stone.B. The introduction received embarrassing response.C. The introduction increased the listeners' interest.D. The introduction carried the host's praise for us.14. What was the author's reaction when the host mentioned the three great literary- giants?A. Excited.B. Inspired.C. Uninterested.D. Satisfied.15. Who may be the author's model?A. Joan Didion.B. Ernest Hemingway.C. Saul Bellow.D. William Styron.第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。

2024～2025学年度上期高2025届半期考试地理试卷考试时间：75分钟满分：100分第I卷选择题（共48分）第I卷共16个小题，每个小题有四个选项，只有一个选项最符合题意，每小题3分，共计48分。

请用2B铅笔在答题卷上将所选答案的代号涂黑。

中国正在逐步进入深度老龄化阶段，老年人口迁移已逐渐成为人口迁移流动的重要组成。

下图为1995-2020年我国各省份老年人口净迁移率分布图，据此完成下面1～3小题。

1.我国老年人口迁移整体方向是（）①向东②向南③向西④向北A.①②B.③④C.①③D.②④2.1995-2020年，我国老年人口迁移规模（）A.先减小后增大B.先增大后减小C.持续减小D.持续增大3.广东省是我国老年人口净迁入最多的省份，最主要原因是（）A.医疗保障完善B.自然环境优美C.基础设施完善D.家庭代际互助城镇空间形态演变具有明显的动态特征。

下图为我国某县级市不同时期城镇空间形态演变示意图。

完成下面4-5小题。

4.影响该城市空间形态的主要因素是（）A.地形地貌B.环境保护C.开发成本D.防灾安全5.2015年后，该城市的建设用地（）A.沿交通线蔓延式快速发展B.以周边卫星城镇用地为主C.以城市更新改造利用为主.D.以城市中心工业用地为主树木年轮变化可以反映当地气候的变化。

河西走廊地处干旱、半干旱区，通过采集该地祁连圆柏的树轮数据，并结合历史时期游牧战争资料，发现两晋南北朝时期河西走廊地区气候变化与游牧民族战争之间存在明显的相关性。

完成6-7小题。

6.祁连圆柏树轮变化突出反映该地（）A.气温变化B.降水变化C.土壤变化D.光照变化7.游牧民族战争的发生可能因为气候变化影响（）A.农牧业产出B.生产力水平C.人口数量D.交通条件我国粮食增产存在区域差异，下表为“我国部分省份2000年、2010年和2023年粮食产量（单位:万吨）统计表”。

完成下面8-9小题。

粮食产区黑龙江省河南省江苏省福建省2000年粮食产量（万吨）2545410231068542010年粮食产量（万吨）5013543732356612023年粮食产量（万吨）7788662437975118.影响黑龙江省与河南省粮食增产差异的主要因素是（）A.耕作制度B.土地资源C.水资源D.技术条件9.近20年南方部分省份粮食产量增长趋势较缓，甚至出现负增长，其主要原因是（）①耕地面积减少②自然灾害频发③农业结构调整④季节撂荒出现A.①②③B.①②④C.①③④D.②③④2023年6月，南京首个沉井式停车场正式运营，该项目采用向地下“挖隧道”的方式来修建停车库，车库深68米共25层，可停200辆车。

2019-2020学年四川省成都七中高三（上）期中数学试卷1一、选择题（本大题共12小题，共60.0分）1.已知集合A={x|−3<x<5}，B={x|1<x≤7}，则A∪B为()A. {x|1<x≤7}B. {x|−3<x<7}C. {x|1<x<7}D. {x|−3<x≤7}2.下列变量是线性相关的是()A. 人的身高与视力B. 角的大小与弧长C. 收入水平与消费水平D. 人的年龄与身高3.命题“∃x∈R，x2+2x+a≤0”的否定是()A. ∀x∈R，x2+2x+a≤0B. ∃x∈R，x2+2x+a>0C. ∀x∈R，x2+2x+a>0D. ∃x∈R，x2+2x+a≤04.函数f(x)=lgx−9x的零点所在的大致区间是()A. (9,10)B. (8,9)C. (7,8)D. (6,7)5.某公司的班车在7：00，8：00，8：30发车，小明在7：50至8：30之间到达发车站乘坐班车，且到达发车站的时刻是随机的，则他等车时间不超过10分钟的概率是()A. 45B. 12C. 56D. 376.执行如图所示的程序框图，输出的结果为()．A. (−2,2)B. (−4,0)C. (−4,−4)D. (0,−8)7. 已知实数x ，y 满足约束条件{x +y ≤1x ≥0y ≥0则z =y −x 的最大值为( )A. 1B. 0C. −1D. −28. 已知m 为一条直线，α,β为两个不同的平面，则下列说法正确的是( )A. 若m//α,α//β,则m//βB. 若α⊥β,m ⊥α,则m//βC. 若m//α,α⊥β,则m ⊥βD. 若m ⊥α,α//β,则m ⊥β 9. 已知复数z =−√3+3i ，则z 在复平面所对应的坐标是( ) A. (3,√3) B. (√3,3)C. (3,−√3)D. (−√3,3) 10. 关于函数y =sin(2x −π3)，下列说法正确的是( ) A. 周期为2πB. x =2π3是它的一条对称轴 C. 有一个对称中心为(π6,0)D. 在[0,π2]上单调递增 11. 已知e 1⃗⃗⃗ 、e 2⃗⃗⃗ 是两个单位向量，且夹角为π3，则(e 1⃗⃗⃗ −2e 2⃗⃗⃗ )⋅(−2e 1⃗⃗⃗ +e 2⃗⃗⃗ )=( ) A. −32 B. −√36 C. 12 D. √3312. 已知函数f (x )={−x 3+x 2,x <1a (2e−x )lnx x+1,x ≥1,若曲线y =f(x)上始终存在两点P ，Q ，使得OP ⊥OQ ，且PQ 的中点在y 轴上，则正实数a 的取值范围为( )A. (0,+∞)B. (0,1e ]C. [1e ,+∞)D. [e,+∞)二、填空题（本大题共4小题，共20.0分）13. 已知向量a ⃗ =(2,1)，b ⃗ =(1,2)则a ⃗ ⋅b ⃗ = ______ ．14. 若双曲线x 2a 2−y 2b 2=1的渐近线与方程为(x −2)2+y 2=3的圆相切，则此双曲线的离心率为______ ．15. 中国古代数学经典《九章算术》系统地总结了战国、秦、汉时期的数学成就，书中将底面为长方形且有一条侧棱与底面垂直的四棱锥称之为阳马，将四个面都为直角三角形的三棱锥称之为鳖臑，如图为一个阳马与一个鳖臑的组合体，已知PA ⊥平面ABCE ，四边形ABCD 为正方形，AD =2，ED =1，若鳖臑P −ADE 的外接球的体积为92π，则阳马P −ABCD 的外接球的表面积等于______．16. 在△ABC 中，内角A ，B ，C 的对边分别为a ，b ，c ，若其面积S =a 2−(b −c)2，则tan A 2=________，sin A2=________．三、解答题（本大题共7小题，共82.0分） 17. 已知数列{a n }中，a 1=1，其前n 项和为S n ，且满足a n =2S n 22Sn −1(n ≥2,n ∈N +). (Ⅰ)求证：数列{1S n }是等差数列； (Ⅱ)证明：13S 1+15S 2+17S 3+⋯+12n+1S n <12．18.如图，在四棱锥S−ABCD中，侧棱均相等，底面ABCD为平行四边形，AC，BD的交点为O．(1)求证：AD//平面SBC；(2)求证：SO⊥底面ABCD．19.有一个容量为50的样本，其数据的茎叶图如图：(1)列出样本的频率分布表；(2)画出频率分布直方图和频率分布折线图．20. 已知椭圆C ：x 2a 2+y 2b 2=1(a >b >0)的右焦点为F(1,0)，过F 的直线l 与C 交于A ，B 两点，点M 的坐标为(2,0).当l ⊥x 轴时，△ABM 的面积为√22． (1)求椭圆C 的标准方程；(2)设直线AM 、BM 的斜率分别为k 1、k 2，证明：k 1+k 2=0．21. 已知函数f(x)=x 2e ax (a <0)．(1)若a =−1，求曲线y =f(x)在(1,f(1))处的切线方程；(2)若对任意x 1，x 2∈[0,2]，f(x 1)−1≤x2x 22+1恒成立，求实数a 的取值范围．22. 极坐标系的极点为直角坐标系xOy 的原点，极轴为x 轴的正半轴，两种坐标系的单位长度相同.已知圆C 1的极坐标方程为ρ=4(cosθ+sinθ)，P 是C 1上一动点，点Q 在射线OP 上且满足|OQ |=12|OP |，点Q 的轨迹为C 2(1)求曲线C 2的极坐标方程，并化为直角坐标方程；(2)已知直线l 的参数方程为{x =2+tcosφ,y =tsinφ,(t 为参数，0≤φ<π)，l 与曲线C 2有且只有一个公共点，求φ的值．23.已知函数f(x)=|2x−1|+|x+1|．(1)求函数f(x)的值域M；(2)若a∈M，试比较|a−1|+|a+1|，32a ，72−2a的大小．-------- 答案与解析 --------1.答案：D解析：【分析】本题考查了集合的并集的运算，熟练掌握并集的定义是解题的关键，属于基础题．根据A、B的范围，求出其并集即可．【解答】解：∵A={x|−3<x<5}，B={x|1<x≤7}，∴A∪B={x|−3<x≤7}，故选：D．2.答案：C解析：解：对于A，人的身高与视力没有什么关系，不是线性相关关系；对于B，同一圆中，角的大小与弧长是确定的关系，是函数关系，不是线性相关关系；对于C，收入水平与消费水平是一种正相关关系；对于D，人的年龄与身高不具有相关关系．故选：C．根据相关关系的定义分别进行判断，即可得出正确的结论．本题考查了两个变量间的相关关系的判断问题，解题时应根据相关关系的定义进行解答，是基础题目．3.答案：C解析：解：因为特称命题的否定是全称命题，所以命题“∃x∈R，x2+2x+a≤0”的否定是：∀x∈R，x2+2x+a>0．故选：C．利用特称命题的否定是全称命题，写出结果即可．本题考查命题的否定，特称命题与全称命题的否定关系，是基础题．4.答案：A在它的定义域内是增函数，且是连续函数，解析：解：由于函数f(x)=lgx−9xf(9)<0，f(10)>0，故函数f(x)=lgx−9的零点所在的大致区间是(9,10)，x故选A．由于函数f(x)=lgx−9x在它的定义域内是增函数，且是连续函数，f(9)<0，f(10)>0，从而得到函数的零点所在的大致区间．本题考查函数零点的判定定理，解题的关键是理解零点的定义以及零点判定定理，属于基础题．5.答案：B解析：【分析】本题考查的知识点是几何概型，是基础的计算题．求出小明等车时间不超过10分钟的时间长度，代入几何概型概率计算公式，可得答案．【解答】解：设小明到达时间为x，当x在7：50至8：00，或8：20至8：30时，小明等车时间不超过10分钟，故P=2040=12，故选B．6.答案：B解析：【分析】本题考查程序框图的循环结构，模拟运行求解即可．【解答】解：第一次循环，S=0，t=2，x=0，y=2，k=1，第二次循环，S=−2，t=2，x=−2，y=2，k=2，第三次循环，S=−4，t=0，x=−4，y=0，k=3，此时退出循环，所以输出的(x,y)为(−4,0)．故选B．7.答案：A解析：【分析】本题考查利用线性规划的知识求目标函数的最值的方法，属于较易题．画出不等式组所表示的区域，找准目标函数的几何意义是关键．【解答】解：不等式组所表示的区域为下图中三角OAB的内部及边界．目标函数z的几何意义为斜率为1的直线在y轴上的截距，由图可知B点坐标为最优解，B(0,1)，所以z max=1−0=1故选A．8.答案：D解析：↵【分析】本题考查线与线、线与面、面与面的位置关系及垂直与平行的判定定理和性质定理，根据题意逐项进行判断即可得到结果.属基础题．【解答】解：对于A，若m//α，α//β，则m、β位置关系不定，故错；对于B，若，α⊥β,m⊥α，则m//β或m⊂β，故错；对于C，若m//α，α⊥β，则m、β位置关系不定，故错；对于D，若m⊥α，α//β，则m⊥β，根据线面垂直、面面平行的性质、可判定m⊥β，故正确．故选D．9.答案：D解析：【分析】本题考查复数的代数表示法及其几何意义，是基础题．直接由复数z写出z在复平面所对应的坐标．【解答】解：∵复数z=−√3+3i，∴z在复平面所对应的坐标是(−√3,3).故选：D．10.答案：C解析：解：∵y=f(x)=sin(2x−π3)，∴T=2π2=π，故A错误；∵f(2π3)=sinπ=0，∴x=2π3不是它的一条对称轴，故B错误；∵f(π6)=sin0=0，∴有一个对称中心为(π6,0)，故C正确；当x∈[0,π2]时，2x−π3∈[−π3,2π3]，∴f(x)在[0,π2]上不是单调函数，故D错误．∴下列说法正确的是C．故选：C．由函数解析式直接求得周期判断A；分别求出f(2π3)，f(π6)的值判断B，C，由复合函数的单调性判断D．本题考查y=Asin(ωx+φ)型函数的图象和性质，是基础题．11.答案：A解析：【分析】本题考查平面向量的数量积运算，是基础题．由已知可得e1⃗⃗⃗ ⋅e2⃗⃗⃗ =12，进一步代入数量积公式即可求得答案．【解答】解：∵e1⃗⃗⃗ 、e2⃗⃗⃗ 是两个单位向量，且夹角为π3，，∴(e1⃗⃗⃗ −2e2⃗⃗⃗ )⋅(−2e1⃗⃗⃗ +e2⃗⃗⃗ )=−2e1⃗⃗⃗ 2+5e1⃗⃗⃗ e2⃗⃗⃗ −2e2⃗⃗⃗ 2=−2+52−2=−32．故选A．12.答案：C解析：【分析】本题考查了分段函数，利用导数研究函数的单调性和利用导数研究函数的极值．利用题目条件得，利用导数研究函数的单调性得函数是单调递增函数，再利用导数研究函数的极值计算得结论．【解答】解：由题意可知点P，Q只能在y轴的两侧，不妨设，Q(−t,t3+t2)(t>1)，由OP⊥OQ得，即有解，所以有解．令，则，令，则，即函数是单调递增函数．因为x=e时，y=0，所以当t∈(1,e)时，f’(t)<0，函数f(t)是减函数;当t∈(e,+∞)时，f’(t)>0，函数f(t)是增函数，，因此当t=e时，f(t)min=f(e)=1e而当t→1时，f(t)→+∞，,+∞)．因此正实数a的取值范围为[1e故选C．13.答案：4解析：解：向量a⃗=(2,1)，b⃗ =(1,2)则a⃗⋅b⃗ =2×1+1×2=4．故答案为：4．直接利用向量的数量积的运算法则求解即可．本题考查平面向量的数量积的坐标运算，考查计算能力．14.答案：2解析：解：∵双曲线渐近线为bx±ay=0，与圆相切，=√3，求得b2=3a2，∴圆心到渐近线的距离为√a2+b2∴c2=a2+b2=4a2，∴e=c=2．a故答案为2．先根据双曲线方程求得双曲线的渐近线，进而利用圆心到渐近线的距离为圆的半径求得a和b的关系，进而利用c2=a2+b2求得a和c的关系，则双曲线的离心率可求．本题主要考查了双曲线的简单性质，直线与圆的位置关系，点到直线的距离公式等．考查了学生数形结合的思想的运用．15.答案：12π解析：解：鳖臑P−ADE可看做如下图所示的长方体的一部分：则长方体外接球即为鳖臑P−ADE的外接球，∴外接球半径为：12√ED2+AD2+PA2=12√5+PA2，又43π×(12√5+PA2)3=92π，∴PA=2，连接AC，BD，交于O′，取PC中点O，连接OO′，可知：OO′=12PA=1，则OA=OB=OC=OD=√2+1=√3，OP=OC=12PC=12√8+4=√3．可知O为阳马P−ABCD的外接球球心，则外接球半径R=√3，∴阳马P−ABCD的外接球表面积S=4πR2=12π．故答案为：12π．将鳖臑P−ADE放入长方体中，利用长方体体对角线长表示出鳖臑P−ADE半径，利用外接球体积求解出PA；通过长度关系可确定阳马P−ABCD的外接球球心为PC中点，从而可得半径，代入表面积公式求得外接球表面积．本题考查多面体的外接球体积和表面积的相关计算，关键是能够根据多面体的特征确定球心的位置，进而求得半径，是中档题．16.答案：14√17 17解析：【分析】根据S=a2−(b−c)2 =12bc⋅sinA，把余弦定理代入化简可得4−4cosA=sinA，由此求得1−cosAsinA的值．本题主要考查三角形的面积公式，余弦定理的应用，属于中档题．【解答】解：∵△ABC的面积为S，且S=a2−(b−c)2=a2−b2−c2+2bc=12bc⋅sinA，∴由余弦定理可得−2bc⋅cosA+2bc=12bc⋅sinA，∴4−4cosA =sinA ， ∴1−cosA sinA=14， ∴tan A 2=sin A 2cos A 2=sin A 2×2sin A2cos A 2×2sin A 2=1−cosA sinA =14又{tan A 2=14sin 2A 2+cos 2A2=1 ∴sin A2=√1717． 故答案为14 √1717．17.答案：证明：(Ⅰ)数列{a n }中，a 1=1，其前n 项和为S n ，且满足a n =2S n 22Sn −1(n ≥2,n ∈N +).则：当n ≥2时，S n −S n−1=2S n 22Sn −1，整理得：S n−1−S n =2S n−1S n ， 所以：1S n−1Sn−1=2(常数)．所以：数列{1S n}是以1S 1=1为首项，2为公差的等差数列．证明：(Ⅱ)由(Ⅰ)得：1S n=1+2(n −1)=2n −1，所以：S n =12n−1， 当n =1时，符合通项． 故：12n+1⋅S n =12(12n−1−12n+1)， 所以：13S 1+15S 2+17S 3+⋯+12n+1S n ， =12(1−13+13−15+⋯+12n−1−12n+1)，=12(1−12n +1)<12解析：(Ⅰ)直接利用递推关系式求出数列的通项公式． (Ⅱ)利用列想想效法求出数列的和．本题考查的知识要点：利用递推关系式求出数列的通项公式及应用，利用裂项相消法求出数列的和，主要考查学生的运算能力和转化能力，属于基础题型．18.答案：(本小题满分12分)证明：(1)∵底面ABCD 为平行四边形，∴AD//BC ，…(2分) ∵AD ⊄平面SBC ，BC ⊂平面SBC ，…(4分) ∴AD//平面SBC.…(6分)(2)∵底面ABCD 为平行四边形，∴O 是AC 的中点， ∵SA =SC ，∴SO ⊥AC ，…(8分)同理，O 是BD 的中点，SB =SD ，∴SO ⊥BD ，…(9分) ∵AC ，BD 是平面ABCD 内的两条相交直线，…(11分) ∴SO ⊥底面ABCD.…(12分)解析：(1)推导出AD//BC ，由此能证明AD//平面SBC ． (2)推导出SO ⊥AC ，SO ⊥BD ，由此能证明SO ⊥底面ABCD ．本题考查线面平行、线面垂直的证明，考查空间中线线、线面、面面间的位置关系等基础知识，考查推理论证能力、运算求解能力，考查化归与转化思想、函数与方程思想，是中档题．19.答案：略解析：(1)由茎叶图可知，数据的最大值为33，最小值为13，分组为7组，可以将区间定为，组距为3，则频率分布表为：(2)频率分布直方图和频率分布折线图如图所示：20.答案：解：(1)依题意得c 2=a 2−b 2=1，即b 2=a 2−1，所以当x =1时，解得y =±a 2−1a ，当l ⊥x 轴时，|AB|=2(a 2−1)a， 因为|MF|=1，所以S △ABM =12|AB|×|MF|=a 2−1a=√22，解得a =√2，所以椭圆C 的标准方程为x 22+y 2=1；(2)当l 与x 轴重合时，k 1=k 2=0，满足条件；当l 与x 轴垂直时，满足条件， 当l 与x 轴不重合且不垂直时，设l 为y =k(x −1)(k ≠0)，设点A(x 1,y 1)、B(x 2,y 2)， 把l 的方程代入x 22+y 2=1，得(2k 2+1)x 2−4k 2x +2k 2−2=0，则x 1+x 2=4k 22k 2+1，x 1x 2=2k 2−22k 2+1，因为k 1+k 2=y 1x1−2+y 2x 2−2=2kx 1x 2−3k(x 1+x 2)+4k(x 1−2)(x 2−2)， 而2kx 1x 2−3k(x 1+x 2)+4k =2k(2k 2−2)2k +1−3k−4k 22k +1+4k =4k 3−4k−12k 3+8k 3+4k2k +1=0，所以，k 1+k 2=0．解析：(1)由已知条件得b 2=a 2−1，利用通径公式得出|AB|的表达式，再由△ABM 的面积得出有关a 的方程，求出a 的值，可得出椭圆C 的标准方程；(2)对直线l 与x 轴垂直、与y 轴垂直以及与斜率存在且不为零三种情况讨论． 在前两种情况下可直接进行验证；在第三种情况下，设直线l 的方程为y =k(x −1)(k ≠0)，将直线l 的方程与椭圆方程联立，列出韦达定理，利用斜率公式并代入韦达定理，通过化简计算得出结论成立．本题考查直线与椭圆的综合问题，考查韦达定理在椭圆综合问题中的应用，同时考查计算能力与推理能力，属于难题．21.答案：解：(1)依题意，f(x)=x 2e −x ，f′(x)=2xe −x −x 2e −x ，故f′(1)=1e ，又f(1)=1e ，故所求切线方程为y −1e =1e (x −1)，即y =1e x ； (2)令g(x)=xx 2+1，故函数g(x)的定义域为R ， g′(x)=1−x 2(x 2+1)2=(1−x)(1+x)(x 2+1)2．当x 变化时，g′(x)，g(x)的变化情况如下表：因为g(0)=0，g(2)=5>0，所以x ∈[0,2]时，函数g(x)的最小值为g(0)=0； 因为f′(x)=(ax 2+2x)e ax . 因为a <0，令f′(x)=0得，x 1=0，x 2=−2a ． (ⅰ)当−2a ≥2，即−1≤a <0时，在[0,2]上f′(x)≥0， 所以函数f(x)在[0,2]上单调递增， 所以函数[f(x)]max =f(2)=4e 2a ．由4e 2a ≤1得，a ≤−ln2，所以−1≤a ≤−ln2．(ⅰ)当0<−2a <2，即a <−1时，在[0,−2a )上f′(x)≥0，在(−2a ,2]上f′(x)<0，所以函数f(x)在[0,−2a )上单调递增，在(−2a ,2]上单调递减， 所以[f(x)]max =f(−2a )=4a 2e 2， 由4a 2e 2≤1得，a ≤−2e ，所以a <−1． 综上所述，a 的取值范围是(−∞,−ln2]．解析：(1)求出函数的导数，计算f′(1)，f(1)，求出切线方程即可；(2)令g(x)=xx 2+1，根据函数的单调性求出g(x)的最小值，通过讨论a 的范围求出f(x)的最大值，求出a 的范围即可．本题考查了切线方程问题，考查函数的单调性、最值问题，考查导数的应用以及分类讨论思想，转化思想，是一道综合题．22.答案：解：(1)设点P ，Q 的极坐标分别为(ρ0,θ)，(ρ,θ)，则ρ=12ρ0=12⋅4(cosθ+sinθ)=2(cosθ+sinθ)， 点Q 的轨迹C 2的极坐标方程为ρ=2(cosθ+sinθ)， 两边同乘以ρ，得ρ2=2(ρcosθ+ρsinθ)，C 2的直角坐标方程为x 2+y 2=2x +2y ，即(x −1)2+(y −1)2=2．(2)将l 的参数方程代入曲线C 2的直角坐标方程，得(tcosφ+1)2+(tsinφ−1)2=2， 即t 2+2(cosφ−sinφ)t =0，t 1=0，t 2=2(sinφ−cosφ)，由直线l 与曲线C 2有且只有一个公共点，得sinφ−cosφ=0，因为0≤φ<π，所以φ=π4．解析：本题考查了极坐标方程、直角坐标方程的转化，参数方程中参数的意义，考查了方程思想，属中档题．(1)设点P ，Q 的极坐标分别为(ρ0,θ)，(ρ,θ)，则ρ=12ρ0=12⋅4(cosθ+sinθ)=2(cosθ+sinθ)，利用，得到C 2的直角坐标方程．(2)将l 的参数方程代入曲线C 2的直角坐标方程，得(tcosφ+1)2+(tsinφ−1)2=2，即t 2+2(cosφ−sinφ)t =0，φ的值应使得关于t 的方程有两相等实根． 23.答案：解：(1)f(x)={−3x,x <−12−x,−1≤x ≤123x,x >12，根据函数f(x)的单调性可知， 当x =12时，f(x)min =f(12)=32．所以函数f(x)的值域M =[32,+∞)；(2)因为a ∈M ，所以a ≥32，所以0<32a ≤1，|a −1|+|a +1|=a −1+a +1=2a ≥3， 所以|a −1|+|a +1|>32a ， 因为32a−(72−2a)=4a 2−7a+32a =(a−1)(4a−3)2a，又由a ≥32，知a −1>0，4a −3>0， 所以(a−1)(4a−3)2a >0，所以32a >72−2a ，所以|a −1|+|a +1|>32a >72−2a ．解析：本题考查了解绝对值不等式问题，考查分类讨论思想，转化思想，是一道中档题． (1)求出函数的分段函数的形式，求出f(x)的最小值，从而求出函数的值域即可； (2)根据绝对值的性质，求出a 的范围，根据作差法比较即可．。

成都七中2024届高三理科综合测试（10月8日）相对原子质量：C—12 H—1 O—16 Cu—64 Cl— 35.5第Ⅰ卷（选择题共126分）一、选择题：本题共13个小题，每小题6分。

共78分，在每小题给出的四个选项中，只有一项是符合题目要求的。

1．下列有关实验的叙述，正确的是（）A．科学家利用同位素标记法进行人鼠细胞融合实验探究了细胞膜的流动性B．摩尔根用白眼果蝇与红眼果蝇杂交，证明了基因在染色体上呈线性排列C．用于鉴定还原糖的斐林试剂的甲液与乙液要等量混合均匀后再加入含样品的试管中，且必须现配现用D．分离细胞器和证明DNA半保留复制的实验均使用了密度梯度离心法2．ABC转运体是一类能促进ATP水解的运输蛋白，广泛分布在从细菌到人类各种生物体中。

每一种ABC转运蛋白对物质运输具有特异性，第一种被鉴定的真核细胞ABC转运体是癌细胞中表达量高的一种多药物抗性运输（对许多药物的运输具有抗性）蛋白MDR，下列叙述正确的是（）A．氯离子和氨基酸依赖同一种ABC转运蛋白跨膜运输B．ABC转运体同时具有ATP水解酶活性和运输物质的活性C．MDR能将外界的药物分子主动吸收到细胞内部，从而使细胞产生抗药性D．在各种细胞中，ABC转运体都需要经内质网、高尔基体加工后运输至细胞膜3．马铃薯块茎中含有丰富的淀粉，营养价值高，是我国五大主食之一、但储存不当容易导致块茎发芽或出现酸味甚至腐烂。

某兴趣小组探究了马铃薯有氧呼吸强度与O2浓度的关系，并将结果绘制如下图。

下列说法错误的是（）A．A点时马铃薯块茎同时进行有氧呼吸和无氧呼吸B．B点对应的O2浓度比A点更有利于马铃薯的储存C．D点时马铃薯块茎呼吸产生CO2的场所只有线粒体基质D．无氧呼吸产生酒精会导致马铃薯块茎在储存时发生腐烂4．《细胞—干细胞》在线发表了中国科学院上海生命科学研究院诱导人成纤维细胞重编程为hiHep细胞的成果。

hiHep细胞具有肝细胞的许多功能，包括分泌血清白蛋白、积累糖原、代谢药物、药物转运等。

2024～2025学年度上期高2025届10月阶段性考试地理试卷考试时间：75分钟满分：100分第Ⅰ卷选择题（共48分）第Ⅰ卷共16个小题，每个小题有四个选项，只有一个选项最符合题意，每小题3分，共计48分。

请用2B铅笔在答题卷上将所选答案的代号涂黑。

下表为相对于2010年第六次人口普查，2020年“七普”中国人口增量排前四位的省份。

截至2020年，甲省养老金累计结余金额过万亿，远超江浙等地区。

完成1～3题。

1．甲省最可能是（）A．广东B．河南C．四川D．河北2．甲省人口增量最大的主要原因是（）A．人口基数大B．人口出生率高C．人口死亡率低D．人口迁入多3．甲省养老金累计结余金额远超江浙等地区，其原因是（）A．人口容量大B．老龄化率低C．经济收入高D．消费水平低山西省运城市临猗县是我国著名的冬枣产区。

受自然条件的影响，该地冬枣花期年际差异大。

下表为2022年和2023年临猗县不同栽培模式下冬枣花期。

据此完成4～5题。

4.与2022年相比，2023年冬枣开花期间（）A.低温寡照B.大风肆虐C.髙温晴热D.和风细雨5.棚内冬枣开花时应注重通风换气，主要考虑的因素是（）A.湿度B.光照C.气压D.气温10．从差异化竞争角度看，未来东部光伏装备制造业应侧重（）A．增建光伏电站B．构建全产业链C．加快产业转移D．加强技术创新道尔顿公路（图）是一条美景与危险并存的公路。

一游人在游记中写到：“向北翻过布鲁克斯山脉，再无山峦遮挡，公路两侧增设了约三米高的标志杆，白天仍有多于12小时的日照用来赶路，晚上也有足够的黑夜留给极光。

艳红的植被赶上一场初雪，一定是全年最上镜的一天”。

完成11～12题。

11．该游记描述的情景可能出现在（）A．3月初B．4月初C．9月初D．10月初12．公路旁标志杆三米高，可避免（）A．被水淹没B．被雪覆盖C．被风吹倒D．被树遮挡青藏高原被誉为“亚洲水塔”，湖泊众多。

随着全球气候变化，青藏高原湖泊面积和数量也在发生变化。

成都七中2019—2020学年度上期高2020届高三半期考试数学试卷（文科）考试时间：120分钟 满分：150分一、选择题（本大题共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. 设集合(){}2|log 1A x y x ==-，{}2|B y y x ==，则A B =（ ）A. (]0,2B. ()1,2C. ()1,+∞D. (]1,22. 已知i 为虚数单位，若复数31iz i-=+，则z =（ ）A. 1B. 2C.D.3. 若a b >，则下列不等式恒成立的是（ ） A. 22ab<B. ()ln 0a b ->C. 1133a b >D. a b >4. 已知点()1,1A -，()1,2B ，()2,1C --，()3,4D ，则向量CD 在AB 方向上的投影为（ ）A.2B. C. 2-D. -5. 成都七中星期一至星期五每天上午共安排五节课，每节课的时间为40分钟，第一节课上课的时间为7:55~8:35，课间休息10分钟.某同学请假后返校，若他在8:55~9:35之间随机到达教室，则他听第二节课的时间不少于20分钟的概率为（ ） A.15B.14C.13D.126. 已知数列{}n a 的前n 项和为n S ，则“{}n a 是等差数列”是“n S n ⎧⎫⎨⎬⎩⎭是等差数列”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7. 已知()()sin f x x ωϕ=+，0ω>，2πϕ<，()f x 是奇函数，直线1y =与函数()f x 的图像的两个相邻交点的横坐标之差的绝对值为2π，则（ ）A. ()f x 在3,88ππ⎛⎫⎪⎝⎭上单调递减 B. ()f x 在0,4π⎛⎫⎪⎝⎭上单调递减 C. ()f x 在0,4π⎛⎫⎪⎝⎭上单调递增D. ()f x 在3,88ππ⎛⎫⎪⎝⎭上单调递增 8. 已知等比数列{}n a 的各项均为正数，且132a ，34a ，2a 成等差数列，则20191817a a a a +=+（ ） A. 9B. 6C. 3D. 19. 椭圆C ：22193x y +=与双曲线Q ：()222210,0x y m n m n -=>>焦点相同，当这两条曲线的离心率之积为1时，双曲线Q 的渐近线斜率是（ ）A. 2±B. C. 12±D. 2±10. 当[]1,1x ∈-时，函数()(2log 23x x f =+的最大值与最小值之和是（ ） A. 10B. 8C. 7D. 611. 在ABC ∆中，点P 满足3BP PC =，过点P 的直线与AB ，AC 所在的直线分别交于点M ，N ，若AM AB λ=，AN AC μ=()0,0λμ>>，则λμ+的最小值为（ ）A.1B.1+ C.32D.5212. 函数()f x 是定义在R 上的偶函数，周期是4，当(]0,2x ∈时，()23f x x =-+.则方程()2log 0f x x -=的根的个数为（ ）A. 3B. 4C. 5D. 6二、填空题（本大题共4小题，每小题5分，共20分）13. 命题“0x R ∃∈，20021x x ->”的否定是______.14. 2019年10月1日，我国在天安门广场举行盛大的建国70周年阅兵典礼.能被邀请到现场观礼是无比的荣耀.假设如图，在坡度为15︒的观礼台上，某一列座位与旗杆在同一垂直于地面的平面上，在该列的第一排和最后一排测得旗杆顶端的仰角分别为60︒和30︒，且第一排和最后一排的距离为则旗杆的高度为______米.15. 在棱长为1的正方体1111ABCD A B C D -中，平面α与正方体每条棱所成的角均相等，则平面α截正方体所形成的三角形截面中，截面面积最大值为______.16. 已知函数()323x x b c f x x =-++有极值，且导函数()'f x 的极值点是()f x 的零点，给出命题：①1c >-；②若0c >，则存在00x <，使得()00f x =；③若()f x 有两个极值点1x ，2x ，则()()120f x f x +>；④若10c -<<，且y kx =是曲线C ：()()0y f x x =<的一条切线，则k 的取值范围是27,24⎛⎫-- ⎪⎝⎭； 则以上命题正确序号是______.三、解答题（本大题共7小题，17-21题各12分，22或23题10分.解答应写出文字说明、证明过程或演算步骤）17. 已知函数()224sin 26x x y f x π⎛⎫=-+- ⎪⎝⎭=. （1）用“五点作图法”作出()f x 在一个周期内的图像；（2）在ABC ∆中，若函数()f x 在角A 处取得最大值，且BC =ABC ∆周长的最大值.18. 如图①，是由矩形ABCD ，Rt EAB ∆和Rt FAD ∆组成的一个平面图形，其中3AB AE AF ===，4AD =.将其沿AB ，AD 折起使得AE ，AF 重合，连结EC 如图②.（1）证明：平面ECD ⊥平面EAD ； （2）求直线BD 与直线EC 所成角的余弦值.19. 2019年电商“双十一”大战即将开始.某电商为了尽快占领市场，抢占今年“双十一”的先机，对成都地区年龄在15到75岁的人群“是否网上购物”的情况进行了调查，随机抽取了100人，其年龄频率分布表和使用网上购物的人数如下所示：（年龄单位：岁）（1）若以45岁为分界点，根据以上统计数据填写下面的22⨯列联表，并判断能否在犯错误的概率不超过0.001的前提下认为“网上购物”与年龄有关？（2）若从年龄在[)55,65的样本中随机选取2人进行座谈，求选中的2人中恰好有1人“使用网上购物”的概率. 参考数据：参考公式：()()()()()22n ad bc K a b c d a c b d -=++++.20. 已知抛物线C ：()220y px p =>过点(1,M -，直线l 经过抛物线的焦点F 与抛物线交于A ，B两点.（1）若直线l 的方程为2y x =-，求AB 的值；（2）若直线OA ，OB 的斜率为1k ，2k ，且122k k +=，求直线l 的方程. 21. 已知函数()sin x x f x e =，()16g x ax =+，[],2x ππ∈-，其中a 为正实数，e 为自然对数的底数. （1）求函数()f x 的单调区间；（2）是否存在实数a ，使得对任意给定的[]0,2x ππ∈-，在区间[],2ππ-上总存在两个不同的1x ，2x ，使得()()()120f x f x g x ==成立？若存在，求出正实数a 的取值范围；若不存在，请说明理由.请考生在第22、23题中任选一题作答，如果多做，则按所做的第一个题目计分.请考生用2B 铅笔将答题卡上所做题目的题号涂黑.22. 选修4-4：坐标系与参数方程在直角坐标系xOy 中，曲线C 的方程为221416x y +=，直线l 恒过定点()1,2M ，倾斜角为α. （1）求曲线C 和直线l 的参数方程； （2）当3πα=时，若直线l 交椭圆于A ，B 两点，求AM BM ⋅的值.23. 选修4-5：不等式选讲已知函数()21f x x x m =+++，m R ∈.（1）若不等式()2f x x m ++≥对x R ∀∈恒成立，求实数m 的取值范围； （2）当1m >时，求不等式()2f x m -<的解集.成都七中2019—2020学年度上期高三数学期中考试参考答案（文）一、选择题1-5：CDCBB 6-10：CAAAD 11-12：AC二、填空题13. x R ∀∈，221x x -≤ 14. 30 15. 216. ①②④ 三、解答题17. 解：（1）()11cos 2cos 2sin 24222x f x x x ⎫-+⋅+⋅-⎪⎪⎭=12cos 2sin 226x x x π⎛⎫=-=- ⎪⎝⎭. 列表，描点如图所示：ππ3（2）当2262x k π-=+，k Z ∈时，()f x 取得最大值，此时3x k π=+，k Z ∈.∴3A =.由余弦定理可知：2222cos3BC AB AC AB AC π=+-⋅⋅，又BC =223AB AC AB AC =+-⋅，由基本不等式()2223AB AC AB AC AB AC AB AC +-⋅=+-⋅()214AB AC ≥+，∴AB AC +≤，∴当AB AC =，即ABC ∆为正三角形时，周长的最大值为 18.（1）证明：由翻折前后的不变关系可知，AE AD ⊥，AE AB ⊥，则AE ⊥平面ABCD . ∴AE CD ⊥，又CD AB ⊥，AEAB A =，∴CD ⊥平面AED .又CD ⊂平面ECD ，∴平面ECD ⊥平面AED .（2）连接AB ，CD 交于点O .作AE 的中点G ，连接OG ，BG ，则直线BD 和直线EC 所成的角为BOG ∠.52BO =，BG =EC =2GO =.∴342545cos BOG +-∠==. 所以直线BD 和直线EC19. 解：（1）由统计表可得，低于45岁人数为70人，不低于45岁人数为30人，可得列联表如下：于是有2K 的观测值()21006015151010014.28610.828752570307k ⨯⨯-⨯==≈>⨯⨯⨯.故可以在犯错误的概率不超过0.001的前提下认为“使用网上购物”与年龄有关. （2）由题意可知，基本事件的总数为10.记事件A 为：选中的2人中恰好有1人“使用网上购物”.A 所包含的基本事件的总数为6.∴()35P A =. 20. 解：（1）将点(1,M -代入抛物线方程，可得4p =，则抛物线方程为28y x =.设()11,A x y ，()22,B x y ，联立282y x y x ⎧=⎨=-⎩，可得21240x x -+=.∴1212x x +=，则12416AB x x =++=.（2）由题意知直线l 的斜率存在且不为0.设直线l 方程为()2y k x =-，()11,A x y ，()22,B x y ，联立()282y x y k x ⎧=⎪⎨=-⎪⎩，可得()22224840k x k x k -++=，显然0∆>，从而212248k x x k ++=，124x x =.∴()()121212121222k x k x y y k k x x x x --+=+=+()12121222222k x x k k k k x x x x +⎛⎫=-+=- ⎪⋅⎝⎭224842224k k k k k+=-=-=，∴2k =-. ∴直线l 的方程为240x y +-=. 21. 解：（1）()()2cos sin cos i 's n x xxx e x xe x ef xe x --==，[],2x ππ∈-. 当()'0f x >，即cos sin 0x x ->时，344x ππ-<<或524x ππ<<， 当()'0f x <，即cos sin 0x x -<时，34x ππ-<<-或544x ππ<<.∴函数()f x 的单调递增区间为3,44ππ⎛⎫-⎪⎝⎭与5,24ππ⎛⎫ ⎪⎝⎭，单调递减区间为3,4ππ⎛⎫--⎪⎝⎭与5,44ππ⎛⎫ ⎪⎝⎭. （2）由（1）可知，函数()f x有两个极小值，34342f e ππ⎛⎫-=- ⎪⎝⎭，54542f ππ-⎛⎫=- ⎪⎝⎭，存在一个极大值442f ππ-⎛⎫= ⎪⎝⎭大致作出函数图像可知：对于函数()16g x ax =+，[]2,2x ππ∈-，假设存在满足题意的实数a . 当0a >时，由[],2x ππ∈-，得()11,266a a g x ππ⎡⎤∈-++⎢⎥⎣⎦.由题意41061262a a e πππ-⎧-+>⎪⎪⎨⎪+<⎪⎩，解得1012a π<<-. 所以，实数a的取值范围是1012a π<<.22. 解：（1）曲线C 的参数方程是2cos 4sin x y θθ=⎧⎨=⎩（θ为参数），直线l 的参数方程是1cos 2sin x t y t αα=+⎧⎨=+⎩（t 为参数）.（2）当3πα=时，直线l的参数方程为122t x y ⎧=+⎪⎪⎨⎪=+⎪⎩（t 为参数），将其代入椭圆方程；化简得(274804t t ++-=，由题意知0∆>恒成立，12327t t =-， 由参数的几何意义得12327AM BM t t ⋅=⋅=.23. 解：（1）2122x x m +++≥恒成立，即112x x m +++≥， 由几何意义可知，112m -≥，可得12m ≤-或32m ≥. （2）不等式为122x m x m -+-<，即212x x m m -+-<， ∵1m >，①当12x ≤时，不等式为122x m x m -+-<，解得13m x ->，所以1132m x -<≤； ②当12x m <<时，不等式为212x m x m -+-<，恒成立，所以12x m <<；③当x m ≥时，不等式为212x x m m -+-<，解得313m x +<，所以313m m x +≤<；综上所述当1m >时，原不等式的解集为13133m m xx ⎧-+⎫<<⎨⎬⎩⎭.。

2019-2020学年成都七中高三英语期末试卷及答案第一部分阅读（共两节，满分40分）第一节（共15小题；每小题2分，满分30分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出最佳选项AIf you had the opportunity to live forever, would you take it? Keeping your body alive indefinitely still seems like an impossibility, but some scientists think that digital technology may have the answer: creating a digital copy of your “self” and keeping it “alive” online long after your physical body has ceased to function.In effect, the proposal is to clone a person electronically. Unlike the familiar physical clones — children that have identical features as their parents, but that are completely separate organisms with a separate life — your electronic clone would believe itself to be you. How might this be possible? The first step would be to mapthe brain.How? One plan relies on the development of nanotechnology (纳米技术). Ray Kurzweil — one of the kings of artificial intelligence — predicts that within two or three decades we will have nano transmitters that can be put into the bloodstream. Inthe capillaries (毛细血管) of the brain, they would line up alongside the neurons and detect the details of the cerebral (大脑的) electronic activity. They would be able to send that information to a receiver inside a special helmet, so there would be no need for any wires sticking out of the head.As a further step, Ray Kurzweil also imagines the nano transmitters being able to connect you to a world of virtual reality on the Internet, similar to what was shown in the film “Matrix”. With the nano transmitters in place, by thought alone, you could log on to the Internet and instead of the pictures coming up on your screen, they would play inside your mind. Rather than send your friends e-mails you would agree to meet up on some virtual tropical beach.Some peoplebelieve that they can enjoy life after death. But why wait for that when you could have a shot of nanobots (纳米机器人) and upload your brain onto the Internet and live forever as a virtual surfer?One snag: to exist on the net you will have to have your neural network parked on the computer of a web-hosting company. These companies want real money in real bank accounts every year or they will wipe your bit of the hard disc and sell the space to someone else. With your body six feet underground how will you pay?1. Which of the following statements is TRUE according to the passage?A. Nano transmitters can help map the human brain.B. Electronic clones recreate the original human body.C. Electronic clones may put their physical selves into movies.D. Nano transmitters use a helmet to detect the cerebral activities.2. What is the author’s attitude towards electronic clones?A. Optimistic and careful.B. Interested and unconvinced.C. Excited and confused.D. Assured and critical.3. The author asks “how will you pay?” at the end of the article, because ________.A. you can’t pay to exist on the Internet if you are physically deadB. you can’t pay for hard disc space if you don’t have a bank accountC. you can’t pay for a special service if too many people want to use itD.you can’t pay the web-hosting company if you don’t have a neural networkBWhile the start of a new school year is always exciting, this year was even more so for some elementary school students inAuckland,New Zealand. They became the world’s first kids to be “taught” by a digital teacher.Before you start imagining a human-like robot walking around the classroom, Will is just an avatar that appears on the student’s desktop, or smartphone screen, when ordered to come.The autonomous animation platform has been modeled after the human brain and nervous system, allowing it to show human-like behavior. The digital teacher is assigned to teach Vector’s “Be sustainable with energy”— a free program forAucklandelementary schools.Just like the humans it replaced, Will is able to instantly react to the students’ responses to the topic. Thanks to a webcam and microphone, the avatar not only responds to questions the kids may have, but also picks up non-verbal cues. For instance, if a student smiles at Will, he responds by smiling back. This two-way interaction not only helps attract the students’ attention, but also allows the program’s developers to monitor their engagement, and make changes if needed.Nikhil Ravishankar believes that Will-like avatars could be a novel way to catch the attention of the next generation. He says, “I have a lot of hope in this technology as a means to deliver cost-effective, rich, educational experience in the future.”The program, in place since August 2018, has been a great success thus far. Ravishankar says, “ What was fascinating to me was the reaction of the children to Will. The way they look at the world is so creative and different, and Will really captured their attention.” However, regardless of how popular it becomes, Will is unlikely to replace human educators any time soon.4. What was special for some elementary school students inAuckland?A. A digital teacher taught them.B. They first saw something digital.C. This was the start of a new school year.D. They could get close to smartphone screen.5. What is the benefit of this two-way interaction?A. It can smile back.B. It can use microphone.C. It can talk any topic for free.D. It can change if necessary.6. What’s Ravishankar’s attitude to Will’s replacing Human educators soon?A. Optimistic.B. Doubtful.C. Unclear.D. Disapproving.7. What might be the best title for the passage?A. New High-tech Contributes to EducationB. The World’s First Digital Teacher Appears in Classroom.C. The World’s First Digital Teacher, a Help to StudentsD.New ZealandWill Replace Teachers in ClassroomsCYu Chenrui, 29, is a maker of automata (机关人偶) in Chengdu, Sichuan province. Automata are built to look like humans or animals and give the illusion (错觉) of being able to move on their own, “The art form amazes me, becauseit combines various skills, from storytelling to mechanics, and the pieces are built with a sense of humor,” Yu says. His creations have caught the attention of well-known artists and his fancy pieces of art have attracted collectors worldwide.Interested in handcrafts as a boy, Yu first encountered automata designed by Japanese artist Kazuaki at an exhibition in 2015 when he studied at the Communication University of China inBeijing. “It was like meeting a like-minded friend, ” Yu says, recalling the moment. As an art and design major, he began to learn the craft by himself and, with the support of his tutor, he kept studying and examining automata in school.When he graduated in 2016, Yu landed a job at an advertising agency inBeijing. He stayed on at the company for three years because, at that time, he was not sure that he could make a living out of his hobby. While working as a designer Yu kept exploring and advancing his skills in wood carving and mechanics. Eventually, despite the job’s good salary, it was not enough to make up for not following his true passion. Finally, in 2018, Yu quit his joband returned toChengduto open his automata workshop.To keep himself occupied while running his workshop, he planted blueberries, raspberries and cherries. He watered, weeded and added fertilizer (肥料) every day. “Daily routines helped me calm down and inspire my creativity, which resulted in an automaton called To Observe the Autumn,” Yu says.Over time, Yu’s reputation grew and his business flourished (兴旺). Many of Yu’s creations are built with a dash of wisdom, a sprinkle of humor and are inspired by observations of real life. Yu knows that there are many more creative ideas waiting to be expressed. “It feels quite good to be fully devoted to automata creation and I am still searching for myself.”8. What can we learn from the first paragraph?A. Yu is equipped with various skills.B. Yu is a person full of sense of humor.C. Yu is now gaining recognition worldwide.D. Yu is following the latest trend in handcraft.9. Why did Yu quit his job inBeijing?A. He couldn't make a living out of it.B. He wanted to pursue his own dream.C. He missed his family inChengdu.D. He thought he had a lot experience.10. According to Yu, what contributes to his creativity as an automata artist?A. The fruits he grows.B. Success of his business.C. His devotion to the job.D. Observation from daily life.11. Which of the following can best describe Yu’s story?A. There is no end to learning.B. Great hopes make great man.C. Actions speak louder than words.D. Experience is the mother of wisdom.DAnOntarioteen is making waves by turning old fishing gear into new treasures. Since last year, Natalie, 15, hasbeen taking lost or thrown — away fishing nets and rope and transforming them into bracelets, rope art, mats, baskets and necklaces.Last year, Natalie was working on an assignment for her science, technology, engineering and mathematics (STEM) class. As part of the assignment, she learned about “ghost nets”, which are fishing nets that have been leftor lost in the ocean by people who fish.“They have huge effects on our environment. They can kill coral reefs and many animals,” said Natalie. “46 percent of the Pacific garbage is ghost gear.” The Great Pacific Garbage is a huge collection of trash floating in the Pacific Ocean betweenHawaiiandCalifornia.Natalie told her mom she wanted to do something to help. She got in touch with a handful of charities, including the Sea Protection Society and Coastal Action.After getting some shipments of ghost nets and rope from those organizations, Natalie, with the help of her family, started turning thediscardedgear into new artworks. “We've made bracelets, rope art, mats, baskets, and we've made necklaces, which also use beach glass in them,” she said. Natalie then started selling the artworks online, the crafty buying and selling website.She donated all her profits-minus a small sum of change to cover supplies — to the charities that donated fishing supplies to her. She's also been donating all the income from her non-profit business, called Nautical Waters, to charity. Natalie said she hoped to continue her passion for ocean life, with plans to study marine biology in university.12. How did Natalie help with ghost nets?A. By turning them into artworks.B. By asking support from her mother.C. By collecting money from charities.D. By selling ghost nets at a good price.13. What made Natalie decide to do something with ghost nets?A. To collect supplies for the artworks.B. To prepare for her study in university.C. To protect coral reefs and marine animals.D. To complete an assignment for her STEM class.14. What docs the underlined word “discarded" in Paragraph5refer to?A. Polluted.B. Rare.C. Waste.D. Discovered.15. What is the best title for the text.A. Ghost Nets Ready forSaleB. Charities Make a Big DifferenceC. Natalie's Passion for Ocean TreasuresD. TeenTurnsOld Fishing Nets into Artworks第二节（共5小题；每小题2分，满分10分）阅读下面短文，从短文后的选项中选出可以填入空白处的最佳选项。