2020海南华侨中学高三11月第四次月考pdf版
2020届海南省华侨中学高三英语第四次联考试卷及参考答案
2020届海南省华侨中学高三英语第四次联考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AIt’s a tempting habit for them to look at their smartphone rather than make eye contact with someone. There is so much to look at: photographs, social media feeds, messages and emails. No wonder they are glued to their screens. But is it good for them?There have been many claims about the damage looking at screens does to our eyesight. Some people feared staring at a small bright box could make us short-sighted. This is a particular concern for children and young people, who spend a higher percentage of time using electronic devices. BBC reporter, Rory Jones, says, “There is enough evidence that no matter how long teenagers are spending looking at screens, they come across information about issues such as anorexia and self-harm that could prove damaging to their mental health.”But a new study says time in front of computers and phones might not be as bad for young people as many think. Research by the Oxford Internet Institute examined data from more than 17,000 teenagers in theUK,Irelandand theUnited States. Their study concluded that most links between life satisfaction and social media use were tiny, accounting for less than 1% of a teenager’s wellbeing. Professor Przybylski, director of research, said, “99.75% of a person’s life satisfaction has nothing to do with their use of social media.” The research found that family, friends and school life all had a greater impact on wellbeing.So, does this mean young people can spend longer looking at social media? TheOxfordresearchers are confident about its findings and that any connection between screen time and mental health is very small. Dr. Max Davie, officer for health improvement at theRoyalCollege, calls the study a “small first step”, but he says there are other issues to explore, such as screen time’s interference(干预) with other important activities like sleep, exercise and time with family or friends. Perhaps for now, the “right” amount of screen time is only a matter of personal judgement.1. What is people’s common belief concerning screen time?A. Looking at screens does harm to young people.B. Screen time provides a chance for teenagers to learn.C. Most teenagers get near-sighted due to looking at screens.D. A small amount of time online does little harm to teenagers.2. What can we learn from the new study by the Oxford Internet Institute?A. Screen time has a great influence on people’s daily activities.B. The right amount of the screen time is related to its content.C. There is a close link between social media and self-satisfaction.D. Social bonds play a more significant role in people’s wellbeing than social media.3. Where is the passage most probably taken from?A. A science fiction.B. A science magazine.C. A research paper.D. An economics book.BAbout a billion birds die from flying into buildings each year inNorth America. Suspicions havebeen that birds may regard the open areas behind glass as safe passageways. Or they may mistake the reflected trees for the real thing.Researchers would like to reduce collisions, which requires a solid understanding about what makes a bird more or less likely to die by crashing into a building in the first place.“There was ly little known at a broad scale. Previous studies were at one small study site.'' Jared Elmore, a graduate student in natural resource ecology and management atOklahomaStateUniversity. So he and his colleagues used a previously created data set of building collisions for birds at 40 sites throughoutMexico,Canadaand theU.S.The first finding was obvious: bigger buildings with more glass kill more birds. But the details were more remarkable. "We found that life history predicted collisions. Migrants(候鸟), insect-eaters and woodland-inhabiting species collided more than their counterparts(同类).”Most migratory species travel at night, when lights near buildings can distract or disorient(使迷失方向)them. And Elmore thinks that insect-eating birds might be attracted to buildings because their insect prey(猎物)is attracted to the lights. He suspects that woodland species get tooled by the reflections of trees and bushes in the windows. The results are in the journal Conservation Biology.By understanding which birds are more likely to collide with buildings, researchers can perhaps determine the best way to adapt buildings, or their lighting, to help prevent such accidents. And by knowing risks, along with migration timing and behavior, building managers can better predict when birds are at their greatest danger - and improve lighting strategics accordingly.Elmore's next project will use radar to help predict bird migrations. " I think that would maybe go a long wayin terms of providing information to people, to the public, to building managers, on when they can get the most benefit in terms of lights-out policies."4. What is the possible reason for birds' crashing into buildings?A. They didn't see the buildings.B. They took reflections for reality.C. They assumed the windows to be open.D. They considered buildings as safe routes.5. What is Jared Elmore's study different from the previous ones?A. It created a new data set.B. It went beyond national borders.C. It covered a wider range of sites.D. I’ll studied some specific bird species.6. What was the most noticeable finding of Jared Elmore's study?A. Migratory species travel at night.B. Birds tend to be misled by glasses.C. Bigger buildings cause more collisions.D. Birds living habits give rise to collisions.7. Which of the following can help reduce bird collision?A. Adjust the lightening system.B. Attach radars to each building.C. Adopt strict lights-out policies.D. Ban using glasses on buildings.CIt all happened one afternoon in Carl's backyard a few years ago. We had just finished playing stickball, and I was about to go home.“Wait a minute,” Carl yelled. He ran into his house and cameback with a book for me to take home and read. All he said was, “See if you like it.”I said ly nothing. I kept the book for a couple of weeks and then returned it unread. Carl never asked me if I liked it or not. During the following two years Carl lent me three more books. Each time I returned them unread.A few days after graduating from high school, Carl asked, “Benny, which college are you going to?”“I'm not going to college.” I said.“Why not?” he asked.“Because my father can't afford the tuition (学费).” I answered.“Is that it?” Carl asked. “Yes,” I said.I lied. I had no intention of going back to school now that I was out. The following day, Carl knocked on my door and handed me a check for seventy-five dollars from his father along with the bookMartin Eden.“I think that should do it.” he said.Once again I was in shock. I was working full-time in my brother's bakery. I attended two classes atWayneUniversitypart-time at night. Halfway through the semester, after receiving failing grades on exams and essays, I decided there was no way I would ever become a good student and get satisfactory grades. I dropped out of college.One day, curious, I picked up the book, thinking Carl was trying to tell me something. Despite difficulty, I pressed on. By the time I finished the book, I understood why: the main character, Martin Eden, had my own poor educational background, but managed to educate himself and become a published author.8. What do we know about the author?A. He often told lies.B. He quit school unwillingly.C. He had thought little of education before.D. He became a published author.9. What kind of person is Carl?A. Caring.B. Emotional.C. Stubborn.D. Cautious.10. What message does Carl want to convey?A. Reading makes a rich man.B. Reading is the journey of the soul.C. Reading makes a person better known.D.Readingopens up new opportunities.11. What is the best title for the text?A. A strong desire for collegeB. A wish for better educationC. A wise friendD. A wise bookDIt is essential that students have a category of school-related activities they can participate in. These activities can range from activities during normal school hours to after-school activities. No matter the time, these activities should be available to every student, and at Victory Pioneers International Schools (V.P.I.S) it is encouraged that every student participate in at least one activity, educational and recreational.One of the primary reasons school activities are important at V.P.I.S. is because it gives students the exercise they might not normally receive. Most popularly, these types of activities include major sports such as football, basketball, baseball, tennis, track and field and soccer but also might include gymnasium games and other games.Activities during V.P.I.S. also make a good impression on colleges if students are planning to pursue more education. Colleges look for students who do not just go to school and go home after school. These activities range from participating in clubs and sports to volunteering after school at a recreation center or having a part-time job. If a college sees you maintained good grades while participating in these activities, it will be impressed.V.P.I.S. activities also allow students to be creative. Gifted-and-talented activities allow gifted students to participate in what they otherwise would never have experienced in the classroom. They are a great way to allow students to be creative. Additionally, participating in clubs such as drama that appeal to students’ interest also allows them to expand their knowledge and be creative.Students also can have their interests expanded by participating in activities. These activities could consist of anything, such as joining the Future Business Leaders, the school’s debate team and the chess team, to name a few. By participating in these activities, a student might realize he is interested in something he never knew he was interested in before.12. What can we learn about activities at V.P.I.S.?A. Not every student has access to them.B. Students are required to take part in them after school.C. They give students exercise that might not be got in other schools.D. Educational activities are more popular with the students.13. What benefits can the students get from the activities?A. They can get extra grades when applying for colleges.B. They will become more gifted and talented .C. They may expand their knowledge in drama.D. They may better know their own interests.14. Which of the following is a suitable title for the passage?A. The Benefits of V.P.I.S. ActivitiesB. School-related Activities at V.P.I.S.C. Colleges Need Creative StudentsD. Activities Make You Creative15. Where is the passage probably from?A. A scientific magazine.B. A college application guideline.C. A club introduction.D. The website of V.P.I.S.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。
2020届海口市琼山华侨中学高三英语月考试题及答案解析
2020届海口市琼山华侨中学高三英语月考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AEast Yorkshire has typical unpredictable British weather. So here are some ideas to keep everybody happy when the weather is not the most ideal.William's Den, North CaveThe outdoor and indoor areas are suitable for children of all ages to have fun.There are nests to explore, rope bridges to cross, a tree-house and a slide. The attached Kitchen provides fresh food made from locally sourced ingredients serving a selection of treats.East Riding Leisure CentresKnown for a fun learner pool alongside an incredible fun zone with two slides as well, it is perfect for kids to find their feet in the water, have fun and explore. Its 6 climbing walls offer a different challenge on each. This place is suitable for anyone over the age of 4 and you can refuel at cafe with fresh food, snacks and cakes.Sewerby Hall and GardensWhen the weather’s not sure, take cover in the Hall and learn how life was in the early 1900’s for the residents and workers of the house. Then explore the zoo and meet the pigs, parrots and penguins! Kids of all ages are welcome.Withernsea LighthouseThere’s no limitation to the age of kids to climb Withernsea Lighthouse, which is 144 steps to the top, with full views of the East Yorkshire Coast at the top of it. Enjoy the museum on the ground floor and learn what life is like working and living in a lighthouse. The souvenir shop provides attractive gifts for visitors at a fair price.1.Which one is unsuitable for kids of all ages?A.William’s Den, North Cave.B.East Riding Leisure Centres.C.Sewerby Hall and Gardens.D.Withernsea Lighthouse.2.Where can kids enjoy food?A.In William’s Den, North Cave and Sewerby Hall and Gardens.B.In East Riding Leisure Centres and Withernsea LighthouseC.In William’s Den, North Cave and East RidingLeisure Centres.D.In Sewerby Hall and Gardens and Withernsea Lighthouse.3.Where does this passage probably come from?A.A geography textbook.B.A science report.C.A finance magazine.D.A travel brochure.BOne rainy afternoon, I was on a crosstown bus when ayoung woman jumped on. She had a child with her who must have been about 3 or 4 years old.The bus was full, bumpy, and it soon got noisy as her kid began crying because he couldn’t sit next to his mother. There were a couple of open seats, but they weren’t together. She wasflusteredand looked embarrassed.Then another woman, a little older, stood up and moved so that the mother and child could sit together. The mom smiled as a thank-you. And then three words came out of the older woman’s mouth that elevated the entire energy of that bus ride: “I’ve been there”.Simple, undramatic and honest. In that moment, it seemed to unite people. Why? Because almost all experiences are shared human experiences. We forget that, as we forge (前进) through life, focused onour own troubles and needs—which are actually less unique than we think. How can these three words create more connection in your life? Ask yourself: “Where am I holding back?One thing I know for sure is this: Healing others helps heal yourself. I noticed this recently with my friend, Tracy, who took a new friend who had suffered a miscarriage under her wing. Tracy had three of them before having her daughter two years ago. Our intellect needs a doctor to explain the medical side of things, yes. But our souls need human connection to help us along. No one can do that better than someone who has been exactly where you are.Can the essence of these three words help you make a small difference right now? It can be as simple as volunteering your seat, sharing some helpful advice or even lightening the mood with a joke when you notice that someone’s uncomfortable—because we’re all in this together.4. The underlined word “flustered” in the second paragraph is closest in meaning to _______.A. angryB. anxiousC.scaredD. upset5. What does the woman mean by saying “ I’ve been there”in the third paragraph？A. The woman was on the bus and saw what had happened to the boy.B. The woman got to her destination and was ready to get off the bus.C. The woman once had the similar experience with that mother.D. The woman took the exact seat that the boy was on just now.6. Which of the following statements is TRUE according to the passage?A. Everyone has his or her own unique problem that is difficult to solve.B. Doctors can help us get through when we have mental or physical problems.C. The author’s friend Tracy felt better after she was comforted by her new friend.D. One can indeed make a difference to those in need of help by doing simple things.7. The passage isintended to _______.A. show a harmonious world by telling some touching storiesB. praise those who are willing to help others in emergenciesC. appeal to readers to give timely help to those in needD. illustrate some ways of helping others in detailCIf you ever find yourself trapped in the wilderness without food, you'llhave to figure out how to feed yourself. Many plants in the wild areedible, but many are also poisonous. So it is necessary to learn how to determine whether the plants you find can be eaten safely.Avoid using this method without careful planning. Some plants can be deadly, and even if you follow these guidelines perfectly, there is always a chance that a plant will make you seriously ill. Prepare yourself for wilderness outings by learning about the local plants, and carry a guidebook to help you identify plants. Even if you are unprepared and cannot find food you know to be safe, remember that, depending on your activity level, the human body can go for days without food, and you’re better off being hungry than being poisoned.Testing the plant in your mouth is dangerous, so go forward very slowly and carefully. First, hold a small portion of the prepared plant part against your lip for 3 minutes. Do not put the plant in your mouth. If you notice any burning, tingling (刺痛), or other reactions, discontinue testing. Second, place another small portion of the plant part on your tongue. Hold the plant on your tongue without chewing for 15 minutes. Discontinue testing if you notice any reaction. Third, chew the plant and holdit in your mouth for 15 minutes. Chew the plant well, and do not swallow. Discontinue testing if you notice any reaction. Fourth, swallow the small portion of the plant. Wait 8 hours. Do not eat or drink anything during this period except purified water. If you feel sick, immediately throw up what you eat and drink plenty of water. If activated charcoal (活性炭) is available, take that with the water.8. What’s the meaning of the underlined world “edible” in paragraph 1?A. Suitable for using as food.B. Widely spread.C. Existing in large quantities.D. Not widely known.9. What can we know from paragraph 2?A. Planning is unnecessary when using the method.B. Not all plants in the wild can serve as food generally.C. Suffering hunger can be more dangerous than testing plants.D. Following the method perfectly can ensure safety.10. Which is the correct order of testing plants in the mouth?① wait and see ② chew it in the mouth③ put it on the tongue④ put it against lips ⑤ swallow itA. ③④②①⑤B. ④③②①⑤C. ③④②⑤①D.④③②⑤①11. Where might the passage come from?A. A student’s diary.B. A science report.C. A guide book for camping.D. A doctor’ s notebook.DAccording to a survey published by the American Institutes for Research last year, a total of 57 colleges were operating some form of CBE programs and about 85 percent of all the higher education officials said they were either designing a CBE program at their school or were considering doing so.Students in a CBE program choose a central field of study, just as they would at a traditional college or university. Yet instead of attending a series of classes led by professors or teaching assistants at schools, the students study online and direct themselves.CBE programs require students to show their understanding of a given set of sills Students must prove their mastery of skills that relate to their field of choice by taking related exams. Once they have met all the requirements of their study programs, the students will get their degrees.CBE programs have made use of many new technologies, especially internet and online media. This helps reduce barriers for nontraditional and other students by bringing higher education to them. And programs that permit students to work at their own speed may save students' money by reducing the time it takes for them to earn a degree.But some educators have concerns about the value of the education that CBE programs offer. Johann NeematWesternWashingtonUniversityargues that the purpose of higher education is not simply to help students master certain skills. It should teach students how to think critically (批判性地) understand the subjects they are studying more deeply and see how they are connected to other subjects. Only that way can they put the knowledge to better use.He said, “You need to explore, think .. get shaken, have a conversation and struggle. Andthose things take time.”Instead of supporting CBE, he adds, policy makers and educators should look for ways to improve access and reduce costs for traditional higher education.12. How are CBE programs different from traditional college education?A. They require students to choose their subjects.B. They offer shorter curricula and are less expensive.C. They heavily rely on the information technologies.D. They allow students to take easier examinations.13. What can we learn from Johann Neem's words?A Free access to traditional education should be provided.B. Higher education just focuses on critical thinking skills.C. Students should spend longer time completing the degree courses.D. College students should be challenged to explore around their subjects.14. How does Johann Neem's attitude toward CBE programs?A. Supportive.B. Disapproving.C. Sympathetic.D. Uncaring.15. What is the author's purpose in writing the text?A. To press policy-makers to provide more affordable education.B. To show the disadvantages of the traditional college education.C. To introduce a new controversial trend in the higher education.D. To encourage educators to improve the quality of CBE programs.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。
2020届海南省海南中学高三第四次月考数学试题解析
绝密★启用前2020届海南省海南中学高三第四次月考数学试题 注意事项：1、答题前填写好自己的姓名、班级、考号等信息 2、请将答案正确填写在答题卡上一、单选题1．设集合{}1,2M =，则满足条件{}1,2,3,4M N =U 的集合N 的个数是（）A ．1B ．3C ．2D ．4 解：因为集合{}1,2M =，则满足条件{}1,2,3,4M N =U 时，集合N 中的个数至少有3、4，则符合条件的集合N 有：{}3,4、{}1,3,4、{}2,3,4、{}1,2,3,4，因此，满足题意的集合N 的个数为4，选D.点评：本题考查符合条件的集合个数，一般将符合条件的集合列举出来即可，考查分析问题和解决问题的能力，属于中等题.2．下列函数中，与函数ln y x =有相同定义域的函数是（）A ．3yx = B ．tan y x =- C ．y = D ．1xy e = 答案：C解：根据函数定义域的要求分别判断已知和选项中的函数的定义域即可得到结果. 解：函数ln y x =的定义域为()0,∞+，对于A ，3y x =的定义域为{}0x x ≠，A 错误； 对于B ，tan y x =-的定义域为,2x x k k Z ππ⎧⎫≠+∈⎨⎬⎩⎭，B 错误； 对于C ，y=的定义域为()0,∞+，C 正确； 对于D ，1x y e=的定义域为R ，D 错误. 故选：C .点评： 本题考查函数定义域的求解，属于基础题.3．“2a =”是“关于x 的不等式210x ax -+<的解集为空集”的（）A ．充分而不必要条件B ．必要而不充分条件C ．充要条件D ．既不充分也不必要条件 答案：A解：令2a =可知不等式解集为空集，充分性成立；当不等式解集为空集时，22a -≤≤，必要性不成立，由此得到结果.解：当2a =时，()222110x x x -+=-<解集为空集，充分性成立；当210x ax -+<的解集为空集时，240a ∆=-≤，解得：22a -≤≤，必要性不成立， ∴“2a =”是“关于x 的不等式210x ax -+<的解集为空集”的充分不必要条件. 故选：A .点评：本题考查充分条件与必要条件的判断，涉及到一元二次不等式的解的问题，属于基础题.4．《孙子算经》是我国古代的数学名著，书中有如下问题：“今有五等诸侯，共分橘子六十颗，人别加三颗．问：五人各得几何？”其意思为：“有5个人分60个橘子，他们分得的橘子个数成公差为3的等差数列，问：5人各得多少橘子．”根据这个问题，5人所得橘子个数的中位数是（）A ．6B ．8C ．10D ．12答案：D解：由等差数列定义可设5人所得橘子数分别为6a -，3a -，a ，3a +，6a +，由橘子总数可构造方程求得中位数.解：设5个人所得橘子数为：6a -，3a -，a ，3a +，6a +， ()()()()633660a a a a a ∴-+-+++++=，解得：12a =，5∴人所得橘子数的中位数为12.故选：D .点评：本题考查等差数列的应用问题，关键是能够根据等差数列的特点，采用待定系数法来求解，属于基础题.5．已知函数()()2cos2f x x x x R =+∈的图象与直线12y =-在y 轴的右侧交点按横坐标由小到大的顺序记为1D ，2D ，3D ，⋅⋅⋅，则35D D =（） A ．2π B ．π C ．32π D ．2π 答案：B解：利用辅助角公式化简()f x ，结合图象可知35D D T =，利用正弦型函数最小正周期的求法可求得结果.解：()3sin 2cos 22sin 26f x x x x π⎛⎫=+=+ ⎪⎝⎭，则()f x 图象如下图所示：由图象可知：3522D D T ππ===. 故选：B .点评： 本题考查正弦型函数最小正周期的求解，关键是能够利用数形结合的方式确定所求距离为最小正周期.6．已知函数()y f x =的图象如图所示，若()()2221lg 100f x x f x ⎡⎤++⋅+≤⎣⎦，则实数x 的取值范围是（）．A ．[]2,0-B ．[)1,+∞C ．(],1-∞D ．(][),20,-∞-+∞U答案：A解：根据()2lg 101x +≥和函数图象可将不等式化为()2210f x x ++≥，由图象可知2211x x ++≤，解不等式求得结果.解：21010x +≥Q ，()2lg 101x ∴+≥，则由图象可知：()2lg 100f x ⎡⎤+≤⎣⎦， ()2210f x x ∴++≥，2211x x ∴++≤，解得：20x -≤≤，∴实数x 的取值范围为[]2,0-.故选：A .点评：本题考查根据函数图象求解函数不等式的问题，关键是能够将不等式化简为函数值的正负，从而确定自变量的范围.7．已知函数()f x 为奇函数，当0x <时，()()3ln f x x a x =+-，且曲线()y f x =在点()()1,1f 处的切线的斜率是1，则实数a =（）A ．1B ．1-C ．2D ．2-答案：C解：利用奇偶性可求得0x >时()f x 的解析式，根据切线斜率为()1f '可构造方程求得结果.解：当0x >时，0x -<，()3ln f x x a x ∴-=-+， ()f x Q 为奇函数，()()()3ln 0f x f x x a x x ∴=--=->，()23a f x x x'∴=-，()131f a '∴=-=，解得：2a =. 故选：C .点评：本题考查导数几何意义的应用，涉及到利用函数奇偶性求解函数解析式的问题8．在等比数列{}n a 中，已知639S S =，且14m a a =，则正整数m 的值为（）A ．2B ．3C ．4D ．5 答案：B解：可验证出当公比1q =时不合题意；当1q ≠时，由等比数列求和公式可构造方程求得公比，结合等比数列通项公式可求得结果.解：设等比数列{}n a 的公比为q ，当1q =时，616S a =，313S a =，11627a a ∴=，即10a =，不合题意； 当1q ≠时，由639S S =得：()()631119111a q a q q q --=--，319q ∴+=，解得：2q =， 1111124m m m a a q a a --∴==⋅=，解得：3m =.故选：B .点评：本题考查等比数列通项公式和求和公式的应用，属于基础题.9．如图所示，在OAB V 中，设P 为OAB V 的外心，向量OA a →→=，OB b →→=，OP p →→=，若4a →=，2b →=，则p a b →→→⎛⎫⋅- ⎪⎝⎭等于（）A ．6B ．5C ．3D ．1答案：A 解：取AB 中点C ，根据平面向量线性运算将所求数量积化为12a b a b →→→→⎛⎫⎛⎫+- ⎪⎪⎝⎭⎝⎭，根据数量积的运算律可求得结果.解：取AB 中点C ，连接,CP OC ，P Q 为OAB V 的外心，CP ∴为AB 的垂直平分线，。
2020-2021学年海南省华侨中学高三英语第四次联考试题及答案
2020-2021学年海南省华侨中学高三英语第四次联考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AThe question of whether our government should promote science and technology or the liberal arts in higher education isn’t an either / or one, although the current emphasis on preparing young Americans for STEM (science, technology, engineering, maths)-related fields can make it seem that way.The latest congressional report acknowledges the critical importance of technical training, but also insists that the study of the humanities and social sciences must remain central elements of America’s educational system at all levels. Both areas are the key to producing citizens who can participate effectively in our democratic society, become innovative leaders, and benefit from the spiritual enrichment that the reflection on the great ideas of mankind over time provides.Parents and students who have invested heavily in higher education worry about graduates’ job prospects as technological advances and changes in domestic and global markets transform professions in ways that reduce wages and cut jobs. Under these circumstances, it’s natural to look for what may appear to be the most “practical” way out of the problem; “major in a subject designed to get you a job” seems the obvious answer to some, though this ignores the fact that many disciplines in the humanities characterized as “soft” often, in fact, lead to employment and success in the long run. Indeed, according to surveys, employers have expressed a preference for students who have received a broadly-based education that has taught them to write well, think critically, research creatively, and communicate easily.Moreover, students should be prepared not just for their first job, but for their 4th and 5th jobs, as there’s little reason to doubt that people entering the workforce today will be called upon to play many different roles over the course of their careers. The ones who will do the best in this new environment will be those whose educations have prepared them to be flexible. The ability to take advantage of every available tool and insight—picked up from science, arts, and technology—to solve the problems of the future, and seize the opportunities, will be helpful to them and the nation.1. What does the latest congressional report suggest?A. STEM-related subjects help students find jobs in the information society.B. The humanities and STEM subjects should be given equal importance.C. The liberal arts in higher education help enrich students’ spiritual life.D. Higher education should be adjusted to the practical needs of society.2. What is the main concern of students when they choose a major?A. Their interest in relevant subjects.B. The academic value of the courses.C. The quality of education to receive.D. Their chances of getting a good job.3. What does the author say about the so called “soft” subjects?A. They benefit students in their future life.B. They broaden students’ range of interests.C. They just improve students’ communication skills.D. They are essential to students’ healthy growth.BScientists at the Massachusetts Institute of Technology (麻省理工学院) have turned spider webs into music——creating an strange soundtrack that could help them better understand how the spiders output their complex creations and even how they communicate.The MIT team worked with Berlin-based artist Tomas Saraceno to take 2D (two-dimensional) laser (激光) scans of a spider web, which were linked together and made into a mathematical model that could recreate the web in 3Din VR (virtual reality). They also worked with MIT’s music department to create the virtual instrument.“Even though the web looks really random (随机)，there actually are a lot of inside structures and you can visualize (可视化) them and you can look at them, but it’s really hard to grasp for the human imagination or human brain to understand all these structural details,” said MIT engineering professor Markus Buehler, who presented the work on Monday at a virtual meeting of the American Chemical Society.Listening to the music while moving through the VR spider web lets you see and hear these structural changes and gives a better idea of how spiders see the world, he told CNN. “Spiders use vibrations (振动) as a way to locate themselves, to communicate with other spiders and so the idea of thinking really like a spider would experience the world was something that was very important to us as spider material scientists,” Buehler said.Spiders are able to build their webs without shelves or supports, so having a better idea of how they work could lead to the development of advanced new 3D printing techniques. “The reason why I did that is I wanted to be able to get information really from the spider world, which is very weird and mysterious,” Buehler explained. In addition to the scientific value, Buehler said the webs are musically interesting and that you can hear the sounds the spider creates during construction. “It’s unusual and eerie and scary, but finally beautiful.” he described.4. What have MIT scientists done according to the passage?A. They have translated spider webs into sounds.B. They have made a mathematical model to produce webs.C. They have created a soundtrack to catch spiders.D. They have known how spiders communicate.5. What can we know about spider webs from paragraph 3?A. Their structures are beautiful and clear.B. Professor Markus Buehler knows them well.C. The American Chemical Society presents the result.D. They are complex for people to figure it out.6. In which field will the study be helpful?A. virtual realityB. printingC. paintingD. film-making7. What is the main idea of the passage?A. It tells us that the music created by spiders is scary.B. It shows how the researchers carry out the experiment.C. It presents a new and creative way to study spiders.D. It explains why scientists did the experiment.CAs an eco-minimalist, Su Yige has maintained an environmentally friendly and sustainable lifestyle for the past three years while studying in Canada. She takes her own bag when she goes grocery shopping and uses second-hand items as often as possible. She avoids almost all paper-related products unless she has to use a public toilet while away from home.Diligence and thrift are time-honored traditional Chinese virtues. Su's family is a good example of this, according to the native of Weihai, Shandong province. Although they have little formal “green” knowledge, her parents lead a very environmentally friendly life.For example, the family has used the same hair dryer for more than a decade, and Su remembers many of her mother's clothes from as far back as kindergarten. “As long as something can still be used, my mother will not replace it with a new item,” she said.“I frequently asked my father to bring the plastic bag back home after dumping our waste in the trash bin. He was unhappy, and argued that instead of making that request, I should go downstairs to dump the waste myself”she said. In another move, her father criticized her for doing too much shopping online. Eventually, they both made steps toward becoming better environmentalists. Her father brings the bag back for reuse and she has only bought two pieces of clothing online in the past six months.Back in Canada, Su is looking forward to finding a job related to sustainable development in China after she graduates as a computer science major in the summer.8. Which of the following best describes Su Yige?A. Conservative.B. Nostalgic.C. Economical.D. Productive.9. What can be found about Su's mother according to the third paragraph?A. She has a lot of formal green knowledge.B. She regards using the same items as a lifestyle.C. She always wears old clothes due to lack of money.D. She will not replace the old items until they are out of style.10. What can be inferred about Su and her father?A. Both of them like to criticize each other.B. Su's father is particular about her clothes.C. The relationship between them is very tense.D. They urge each other to become more environmentally friendly.11. What can we learn about the author soon after she graduates in Canada?A. She will stay there to look for a job.B. She will put effort into computer science.C. She will devote herself to her motherland's future.D. She will come back to China to stay with her parents.DThere are similarities and differences between high school life and college life.For one thing, there are several similarities between high school life and collegelife. First, the most important task in high school and college is both studying. Studying is the most important as a student. Second, we need a goal to fight for in both high school life and college life. To lead a meaningful life, we have to set up a goal to achieve.For another, there are also some differences between high school life and college life. First, our studying is also the biggest difference. In high school, we are required to follow our teachers' steps and finishtheirassignmentsevery day. While in college, there are no teachers giving such detailed requirements to us and we can choose study or not according to our own willing. What and how to study totally depends on us. Therefore, the ability of self-control is very important in college life. Second, the flexibility (灵活性) of time is another difference. In high school, we have no much leisure except for our time of study. However, in college, we have much controlled by ourselves except the time of classes. And we have more time to do what we like. Finally, college lifeis much more various and richer. Besides study, we can attend many other activities, which make our college life more wonderful.In brief, there are both similarities and differences between high school life and college life. However, no matter we are in which period, we need to make full use of every day so that we will never feel regretful.12. Why do students need a goal to fight in high school and college?A. To enter a good college.B. To avoid living a meaningless life.C. To develop the ability of control.D. To meet their parents’ satisfaction.13. What does the underlined word “assignments” in paragraph 3 probably mean?A. Projects.B. Tasks.C. Goals.D. Dreams.14. Which is the correct structure of the passage?A. ①-②③-④B. ①②-③-④C. ①-②③④D.①②-③④15. Which of the following can be the best title for the text?A. College LifeB. High School LifeC. High School and CollegeD. High School Life and College Life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。
2020-2021学年海南省华侨中学高三英语第四次联考试题及参考答案
2020-2021学年海南省华侨中学高三英语第四次联考试题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AThe COVID -19 pandemic has affected all aspects of life, including the way we travel. But for those who are looking to expand their horizons while still staying safe, the following three travel trends in 2021 may provide inspirations. Let’s take a look.StaycationWith many travel restrictions during the pandemic, people preferred traveling to nearby places in 2020. This trend continues in 2021. According to search data, 62 percent of people are interested in taking a vacation within driving distance of home. People who live in large cities want to get back in touch with nature. Travelers are looking for places different from their everyday accommodations, for example, farm stays, villas and cottages.Pod travelWhile 2020 saw a rise in solo travel and isolated adventures, 2021 shows that people want to be more connected. “Pod travel”, or gathering in isolated spaces with loved ones, is growing in popularity. 85 percent of survey respondents favor traveling with family or friends, and over half of the trips searched include three or more people. Pod travel is here to stay for those who want to safely be together while reducing risks associated with socializing with others.Remote working and travelingMany people worked and learned from home in 2020 because of the pandemic. Remote working blurs the line between working and traveling. There was a 128 percent increase in the mention of phrases such as “relocation”, “relocate”, “remote work” and “trying a new neighborhood”. People are actively booking longer stays (e. g. two plus week trips) in small to mid—size cities with access to immersive natural surroundings and wide—open spaces.1.What can we learn about Staycation?A.Travelling to the countryside.B.Taking an isolated adventure.CHaving holidays in nearby places. D.Staying indoors all by oneself.2.What’s special about Pod travel?A.Traveling alone.B.Traveling far away.C.Traveling while working.D.Traveling with loved ones.3.Where might we find the text in a magazine?A.Medicine.cation.C.TourismD.Career.BAn afternoon nap(午睡)is one of the joys of life, although too much napping could signal all is not well. In some cultures, people will have a daily nap — thisis fine. The warning comes when people start sleeping during the daytime, when they did not before. There is certainly a good reason to believe that daytime sleepiness — as in the Alzheimer's study — can be a marker of an underlying condition.For most people, napping during the day is mainly a sign that you are not getting enough sleep at night, says Dr. Neil Stanley, a sleep expert. "If you feel sleepy during the day, you should think about taking a nap. That is what the body needs — it doesn't need to be kept awake with caffeine, it needs sleep. "The feeling to notice is "sleepiness", he says, not "tiredness", which could be more psychological and linked to stress.So how do you nap well? The key thing, says Stanley, is how long your nap lasts. Choose either a 20-or 90-minute nap. "When you fall asleep, you'll quickly go through the lighter stages of sleep into your first period of deep sleep. You don't want to wake up in deep sleep because that's when you wake and feel worse than you did before. "Napping for 20 minutes means you will wake up before you go into deep sleep; napping for 90 minutes means you'll complete a sleep cycle.Once you factor in the time it takes to fall asleep — some people are better at napping than others but, says Stanley, "a healthy adult will fall asleep in between 5 and 12 minutes" — you can set an alarm, allowing a 30- to 40-minute period for a short nap, and up to two hours for a longer one.A good time to nap is during the body's natural dip in the afternoon, between 2 pm and 4 pm. "You don't really want to be napping much pastthatbecause then you are going to be eating into your night-time sleep," Stanley says. The point, he stresses, is to get good night-time sleep, which would ensure you probably don't need to nap at all.4. What does an afternoon nap indicate for most people?A. Caffeine addiction.B. Psychological stress.C. Insufficient night sleep.D. Potential physical illness.5. What is the key to a good nap?A. Duration.B. Surroundings.C. Health.D. Stages.6. What does the underlined word "that" in the last paragraph refer to?A. A 30- to 40- minute period.B. Between 2 pm and 4 pm.C. Between 5 and 12 minutes.D. A 20- to 90-minute period.7. Which of the following can be the best title for the text?A. Why to phase a napB. When to take a good napC. What to learn from a napD. How to have a successful napCThereare two days that set you on your path in life: the day you’re born, and the day you realize why you were born.Growing up south of Chicago in Harvey, Illinois, most people just had their heads down trying to make it from point A to point B. I was the same way, just going with the flow. I played basketball in high school because I was good at it and because other people thought I should until I discovered my talent.I give up basketball and started doing speeches. It wasn’t a popular decision but my grandfather told me to do what made me happy. I fell in love with comedy and performing. And when I discovered the passion, I realized why I was born.I knew I had something to offer —I knew that not only am I powerful, but I can make a difference.I realized a long time ago that my dream is not to be famous or rich. My talent is to entertain. But it’s more than that. I have the chance to reach people, to brighten days, to bring laughter and positive energy into lives and inspire. And I am grateful forit.Acting putting myself out there and having doors closed on me time and time again has taught me a lot about myself. I have learned to trust what I have to offer the world over momentary doubt. I’ve learned to put my faith over my feelings. And I've grown a tough skin. More importantly, I have learned there is a long way towards our goals and that when we put our talents and passion to work, we determine our value.Like a lot of places across the country, there’s poverty, crime, violence and unemployment in Harvey. And growing up there, a lot of people have tragically low expectations for life. But I know that with the right opportunity and with help along the way, everyone can find their passion and go after it. My life is proof.8. What was the author born to do according to the text?A. Be a basketball player.B. Act and perform.C. Make speeches.D. Teach people.9. What does the underlined word “it” in Paragraph 5 refer to?A. Chance.B. Energy.C. Days.D. Laughter.10. What is the author’s purpose of writing this text?A. To help others find their talents.B. To prove his decision was right.C. To inspire people to follow their dreams.D. To encourage people to set a goal.11. What can be the best tile for the text?A. Success Lies in Hard Work.B. How to Achieve the Dream Is Important.C. The Two Important Days in Life.D. The Day I Realized What I Was Born to Do.DThere are 195 countries in the world today but almost none of them have purple on their national flag. So what’s wrong with purple? It’s such a popular color1 today. Why would no country use it in their flag? The answer is really quite simple. Purple was just for too expensive.The color1 purple has been associated with royalty power and wealth for centuries. Queen Elizabeth I forbade anyone except close members of the royal family to wear it. Purple’s high status comes from the rarity and cost of the dye (染料)originally used to produce it. Fabric traders got the dye from a small sea snail (海螺)that was only found in the Tyre region of the Mediterranean. More than 10,000 snails were needed to create just one gram of purple; not to mention a lot of work went into producing the dye, which made purple dye so expensive.Since only wealthy rulers could afford to buy and wear the color1 , it became associated with the royal family. Sometimes, however, the dye was too expensive even for royalty. Third century Roman Emperor Aurelio famously wouldn’t allow his wife to buy a scarf made from purple silk because it cost three times its weight in gold. A single pound of dye cost three pounds of gold, which equals 56,000 dollars today. Therefore, even the richest countries couldn’t spend that much having purple on their flags.The dye became more accessible to lower-class about a century and a half ago. In 1856, 18-year-old English chemist William Henry Perkin accidentally created a man-made purple compound (化合物)while attemptingto produce an anti-malaria drug. He noticed that the compound could be used to dye fabrics, so he patented the dye, manufactured it and got rich. Purple dye was then mass-produced so everybody could afford it.Till now, a handful of new national flags have been designed and a few of them have chosen to use purple in their flag. So don’t be making any bets just yet.12. Why was color1 purple expensive in the past?A. Because only royal families were allowed to wear purple.B. Because it took a long time to get purple dye from gold.C. Because purple was worth as much as its weight in gold.D. Because purple dye used to be rare and hard to produce.13. Why did Roman Emperor Aurelio forbid his wife to buy a purple scarf?A. Because of poor quality.B. Because of long tradition.C. Because of bad taste.D. Because of high price.14. What is purple's situation now?A. Purple has been widely used on national flags.B. Purple dye is now affordable to ordinary people.C. Royal family stop using purple because it’s toocommon.D. Fewer snails are used to produce purple dye than before.15. Which of the following would be the best title for the passage?A. No Purple Flags?B. Purple vs GoldC. How to Produce Purple Dye?D. The Birth of Purple Color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。
2020-2021学年海口市琼山华侨中学高三英语第四次联考试题及答案
2020-2021学年海口市琼山华侨中学高三英语第四次联考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AThe Rechargeable Go!☑The digital sound processing chip(芯片) provides clear sound and makes speech easier to understand with less whistling sound☑Never replace batteries again!Full Charge Gives 16 Hours of Use! (Free Charging Station Included)☑Easy On/ Off Button☑Automatic Noise Reduction and Feedback Canceler☑100% Money Back Guarantee5 Star Reviews☑☑☑☑☑Amazing!"My sisters had all given up hope that our elderly mother would hear us clearly again. And then we took a chance. We're so glad we did. They've been amazing for her, and for our entire family."-Karen M.The new HearClear GO Rechargeable Digital Hearing Aids feature advanced digital technology at an unbelievably affordable price! The GO has the same key elements that all high-end digital hearing aids share while leaving out fancy bells and whistles that increase cost and require expensive adjustments. You'll be happier saving much money!Your lightweight GO hearing aids are amazingly convenient! With the GO'S charging station, you won't have to keep replacing tiny hearing aid batteries, and the GO is pre-programmed for most mild to moderate hearing loss-no costly professional adjustments needed.You can spend thousands on an expensive hearing aid, or you can spend just $ 239 on a hearing aid that's great for most mild to moderate hearing loss (only $ 199 each when you buy a pair). We're so sure you'll be happy with your new hearing aids.1. Which is the feature of the GO?A. It removes noises.B. It has separate on/ off buttons.C. It includes small batteries.D. It focuses on practical functions.2. Why does the author refer to Karen?A. To prove the GO's popularity.B. To explain the GO'S function.C. To convey the family's amazement.D. To show the GO'S high performance.3. How much do you pay for a pair of the GO?A. $ 199.B. $ 239.C. $ 398.D. $ 478.BEach year, the women of Olney and Liberal compete in an unusual footrace. Dressed in aprons (围裙) and headscarves, they wait at both towns’starting lines. Each woman holds a frying pan with one pancake inside. At the signal, the women flip (轻抛) pancakes and they’re off!This “pancake racing” tradition is said to have started on Shrove Tuesday, 1445, in Olney. Shrove Tuesday is the day beforethe Christian season of Lent (大斋戒) begins. During Lent, many people decide to give up sugary or fatty foods.Legend says that in 1445, an Olney woman was making pancakes to use up some of her sugar and cooking fats before Lent. She lost track of time and suddenly heard the church bells ring, signaling the beginning of the Shrove Tuesday service. Realizing that she was going to be late for church, she raced out the door still wearing her apron and headscarf and holding her frying pan with a pancake in it. In the following years, the woman’s neighbors imitated her dash to church, and pancake racing was born.The rules are simple. Racers must wear the traditional headscarf and apron. They must flip their pancakes twice - once before starting and once after crossing the finish line. After the race, there are Shrove Tuesday church services. Then Liberal and Olney connect through a video call to compare race times and declare a winner.In both towns, the races have grown into larger festivals. Olney’s festival is an all-day event starting with a big pancake breakfast. Liberal’s festival lasts four days and includes a parade, a talent show, and contests that feature eating and flipping pancakes. Although the women’s race is still the main event, both towns now hold additional races for boys and girls of all ages.4. How did pancake racing start?A. A woman in Olney created it.B. Women made pancakes before Lent.C. A woman dashed to church with a pancake.D. People followed the suit of an interesting incident.5. What should racers obey during the race?A. They can wear fashionable headscarves and aprons.B. They must flip their pancakes once in the race.C. They must flip their pancakes at the beginning of the race.D. They can flip their pancakes in the middle of the race.6. What can we learn about the race from the last paragraph?A. People can show their talent in Olney festival.B. People can enjoy a one-day holiday in Liberal.C. The race is not only intended for women now.D. People can have a big pancake breakfast in both towns.7. What is the text mainly about?A. The origin of pancake racing.B. The history of pancake racing.C. The development of pancake racing.D. The introduction to pancake racing.CHave you ever done something that was really dangerous just because you thought it was safe？Maybe you did a dangerous trick on your bicycle or skateboard because you were wearing a helmet and thought you couldn’t get hurt. The psychology(心理) of this sort of behavior is called the Peltzman Effect, named after Sam Peltzman, professor of economics at the University of Chicago. Peltzman believes that those moments when people think they are the safest are the times when they act most dangerously.Peltzman said that people drove more dangerously when they wore seat belts(安全带) . Driving a large four-wheel drive vehicle has a similar effect on drivers’ behavior. Because drivers of large vehicles sit up higher and can see better, they feel they can make better judgments when they drive. They are better protected in accidents,so they act more dangerously. This makes driving morehazardousto other drivers.The Peltzman Effect isn’t just limited to driving. In 1972, the American Food and Drug Administration (FDA)passed a law requiring child safety caps on most medicine bottles. The safety caps were designed to prevent children from accidentally taking the medicine, especially painkillers such as aspirin. Requiring safety caps sounded like a great idea, but there was an unexpected side effect. Because the safety caps are so hardto take off, some people leave them off altogether．Worse, some parents leave the bottles where kids can reach them because they feel that it is safe because of the cap. A study on the Peltzman Effect showed that more than 3,500 children have been harmedby aspirin because of the safety caps.The Peltzman Effect describes how we’re likely to take more risks and act more dangerously when we feel safest. What’s more, the effects of these behaviors can be quite different from what we expect.8. What is the Peltzman Effect？A. People behave less safely when they feel safe．B. People feel safest when they are under protection．C. Something that seems dangerous turns out to be safe．D. People who act dangerously are likely to be together．9. What does the underlined word“hazardous”in Paragraph 2 mean？A. Interesting．B. Expensive．C. Dangerous．D. Important．10. Medicine bottles with safety caps ________．A. are required throughout the worldB. meet the demands of the Peltzman EffectC. sell well in the worldD. are not completely safe11. What would be the best title for the text？A. Unsafe Safety MeasuresB. Types of Decision MakingC. People’s Fear of Taking RisksD. Different Behaviors of People in DangerDWhile space travel still gets lot of attention, not enough attention has been paid to the exploration of oceans, about which we know much less than the dark side of the moon.Ninety percent of the ocean floor has not even been recorded and while we have been to the moon, the technology to explore the ocean's floors is still being developed. For example, a permanent partially-underwater sea exploration station, called the Sea Orbiter, is currently in development.The oceans play a major role in controlling our climate. But we have not learned yet how to use them to cool us off rather than contribute to our overheating. Ocean organisms are said to hold the promise of cures for a wide of the unique eyes of skate (ray fish) led to advances in conquering blindness, the horseshoe crab was important in developing a test for bacterial pollution, and sea urchins helped in the development of test-tube fertilization(人工授精). The toadfish's' ability to regenerate its central nervous system is of much interest to neuroscientists. A recent Japanese study concluded that the drug Eribulin, which was taken from sea sponges, is effective in fighting with breast, colon, and Urinary cancer.Given the approaching crisis of water insufficiency, we badly need to improve current methods, of desalinating(淡化) ocean water and make them more efficient and less costly. By 2025, 1.8 billion people are expected to suffer from severe water shortage, with that number jumping to 3. 9 billion by 2050-well over a third of the entire global population.If the oceansdo not make your heart go beating faster, how about engineering a bacterium that eats carbon dioxide — and thus helps protect the world from overheating — and produces fuel which will allow us to drive our cars and machines, without oil? I cannot find any evidence that people young or old, Americans or citizens of other nations would be less impressed or less inspired with such a breakthrough than with one more set of photos of a faraway galaxy or a whole Milky Way full of stars.12. What does the author think about the ocean exploration?A. It is equal to the space exploration.B. It is well developed.C. It deserves more attention and devotion.D. It is beyond our knowledge.13. What technology has been developed to make use of the oceans?A. Curing human diseases with ocean organisms.B. Preventing the world getting warmer.C. Mapping the global ocean floor.D. Removing salt from sea water.14. What does the author imply in the last paragraph?A. The temperature rise will be overcome by a bacterium.B. Solving the existing problems is more significant.C. The space exploration is worth the efforts.D. The ocean exploration is not inspiring.15. What is the best title of the passage?A. Oceans, the Last Hope.B. Oceans, the Hidden Treasure.C. Space, the Final Frontier.D. Space, the Faraway Dream.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。
海南省华侨中学2023届高三第四次模拟考试数学试题
试卷第 4 页，共 5 页
SE 的值；若不存在，说明理由． SD
21．已知椭圆C :
x2 a2
y2 b2
1 a
b
0 的离心率为
6 ，且椭圆 C 经过点 3
3,1 ，过右
焦点 F 的直线 l 与椭圆 C 交于 A，B 两点.
(1)求椭圆 C 的方程；
(2)设 O 为坐标原点，求VOAB 面积的最大值以及此时直线 l 的方程.
C．x x 1
D．x x 1
2．已知复数 z 满足 z 2z 1 3i ，其中 i 是虚数单位， z 为 z 的共轭复数，则 z （ ）
A．1 i
B．1 i
C． 1 i
D． 1 i
3．在 VABC 中，“ cos A cos B ”是“ sin A sin B ”的（ ）
A．充分不必要条件
B．必要不充分条件
试卷第 1 页，共 5 页
A． 5
B． 7
C．3
8．设 a 1.2 ， b e0.1， c 1 ln1.1，则（ ）
A． a b c
B． c b a
C． b a c
D． 11 D． b c a
二、多选题 9．下列命题中正确的是（ ）． A．一组从小到大排列的数据 0，1，3，4，6，7，9，x，11，11，去掉 x 与不去掉 x，
22．已知函数 f (x) ln x x(x 3) .
(1)讨论 f (x) 的单调性；
(2)若存在 x1, x2, x3 (0, ) ，且 x1 x2 x3 ，使得 f (x1) f (x2 ) f (x3) ，求证：
2x1 x2 x3 .
试卷第 5 页，共 5 页
10．在四棱锥 P ABCD 中，底面 ABCD 为矩形，侧面 PAB 为等边三角形，
2020年海口市琼山华侨中学高三英语月考试卷及答案
2020年海口市琼山华侨中学高三英语月考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AInformation on school visits to Kew GardensEnjoy yourselves in a wonderland of science with over 50,000 living plants and a variety of educational events or amusing activities. Here is essential information about planning a school visit to Kew.Educational course pricesYou can plan a self-led visit or book one of our educational courses. Students will take part in the educational courses in groups of 15. Prices vary according to different situations.EYFS (Early Years Foundation Stage) to Key Stage 4:45-minute course: 35/group 90-minute course: 70/groupKey Stage 5:Half day (one course): 80/group Full day (two courses): 160/groupTeachers and adults:Up to required key stage proportions (比例): FreeAdults needed for 1:1 special educational needs support: FreeAdults above the required proportions: 11/personThe payment will due within 28 calendar days of making the booking.Health and safetyRequired supervising (监护) adult-student proportions:Key Stage 1: 1:5 Key Stage 2: 1:8Key stage 3: 1:10 Key Stage 4: 1:12Key Stage 5: 1:12The group sizes should be controlled if you are visiting potentially busy areas such as the glasshouse and other attractions. The maximum number of students visiting the glasshouses is 15 per group and each group to Kew shops should include no more than 10 students.If there is an emergency, please contact the nearest Kew staff member or call Constabulary on 0208 32 3333 for direct and quick support. Please do not call 999.Planning your visitYour tickets and two planning passes will be sent to you upon receipt of your payment. You can complete your risk assessment with the passes, ensure you bring your tickets and the receipt document and show them to the staff members at the gate on the day of your visit.Recommended timingsThe Kew Gardens opens at 10 am. You are recommended to spend at least three to five hours on your visit. The closing time varies throughout the year. But the earliest is 3:30 pm. We have a fixed schedule for educational courses, which is from 10:30 am to 2:20 pm.1.How much should a group of 15 Key Stage I students and 4 teachers pay for a 45-minute course?A.35B.46C.57D.812.What should one do in an emergency?A.Check the risk assessment.B.Call 999 immediately.C.Ask adults or teachers for help.D.Seek help from the staff member nearby.3.What is the purpose of the text?A.To introduce Kew Gardens.B.To give tips on visiting Kew Gardens.C.To attract potential visitors to Kew Gardens.D.To inform coming activities in Kew Gardens.BI waschecking out at the supermarket counter on Wednesday night, ready to pay for my bananas, when all ofa sudden, fear came upon me. My wallet was gone. And I could only have left it one place: the G9 bus, from which I had gotten off minutes earlier and which was now speeding to some stops. The moment of realizing it was gone was followed by mental math. How much time and money would it cost to replace the credit cards, the driver's license, the expensive lipstick ($ 55!).Two hours after I was back at my house, I heard a knock on the door. My husband answered while I sat in the dining room on the phone with a credit card company. "Does Jennifer live here?" I heard someone say. In her hand was my wallet, without a penny missing. She left before I could offer my gratitude to her.After I posted the story, I heard from her boyfriend, who identified the good citizen as Erin Ball, a 26-year-oldgirl working for a trade organization.Once I figured out her, I called to thank her. She said she spotted my wallet and thought that it's more dangerous to go to a stranger's house than leaving the wallet with the driver, but she still decided to take the chance. "If I were in that situation, I would want someone to try to find me," she said. Ball doesn't find her actions particularly excellent. She added, "It's not hard to do small things for people."After Ball found my wallet, she decided to post a picture of my driver's license online before going to my house, trying to see if anyone knew me. No sooner had she left my doorstep than I got emails from two neighbors who recognized my face, both offering to help me find my missing property.Ball found my house on a bitterly cold night,for which I was extremely grateful. Looking back, I'm not surprised someone had wanted to help a stranger. A warm current of honesty and harmony is running through this town.4. What do we know about the author according to paragraph 1?A. She missed the G9 bus.B. She paid for her bananas.C. She replaced the credit cards.D. She found she had left her wallet on the bus.5. Who helped the author find Ball?A. The G9 driver.B. The girl's boyfriend.C. The author's neighbors.D. The author's husband.6. What did Ball do first after finding the wallet?A. Ball called the author.B. Ball went to the author's house.C. Ball gave the wallet to the bus driver.D. Ball posted a photo of the author's driving license.7. Which of the following best describes Erin Ball?A. Humorous and kind.B. Generous and demanding.C. Honest and warm-hearted.D. Caring and outgoing.CIt's a popular belief that a fish's memory lasts for only seven seconds. It may seem sad to think that they don't remember what they've eaten or where they’ve been, and they don't identify you or any of their friends--every moment intheir life would be like seeing the world for the first time.But don't be so quick to feel sorry for them. A new study has found that fish have a much better memory than we used to think. In fact, certain species of fish can even remember events from as long as 12 days ago. In the study, researchers from Mac Ewan University in Canada trained a kind of fish called African cichlids to go to a certain area of their tank to get food.They then waited for 12 days before putting them back in the tank again. Researchers used computer software to monitor the fish’s movements.They found that after such a long break the fish still went to the same place where they first got food. This suggested that they could remember their past experiences.In fact. scientists had been thinking for a long time that African cichlids might have a good memory. An earlier study showed that they behaved aggressively(挑衅地) in front of certain fish, perhaps because they remembered their past "fights".But until the latest findings, there was no clear evidence.Just as a good memory can make our lives easier, it also plays an important part when a fish is trying to survivein the wild. "If fish are able to remember that a certain area contains safe food, they will be able to go back to that area without putting their lives at risk,"lead researcher Trevor Hamilton told Live Science.For a long time, fish were placed far below chimpanzees, dolphins and mice on the list of smart animals.But this study has given scientists a new understanding of their intelligence.8. According to the text, people commonly believe that ______.A. fish don't recognize any of their friendsB. a fish's memory lasts for only seven minutesC. fish can only remember part of their past experiencesD. fish can remember things that happened long ago9. How can fish benefit most from a good memory?A. They can remember their enemies and fight.B. They can remember where to get food and survive.C. They can remember their friends and help each other.D. They can remember where to go when in danger.10. What can we learn from the text?A. Only African cichlids have a good memory.B. African cichlids can remember things for 12 days.C. African cichlids always treat other fish aggressively.D. African cichlids don't belong to the list of smart animals.11. What is the text mainly about?A. What we can learn from fish.B. Fish having a very bad memory.C. How fish improve their memory.D. Fish being smarter than we thought.DWith their tiny brains and excellent ability to memorize nectar locations, honeybees are a favorite model organism for studying learning and memory. Such research has indicated that to form long-term memories—ones that last a day or more—the insects need to repeat a training experience at least three times. By contrast, short-and mid-term memories that last seconds to minutes and minutes to hours, respectively, need only a single learning experience.Exceptions to this rule have been observed, however. For example, in some studies, bees formed long-lasting memories after a single learning event. Such results are often regarded as circumstantial anomalies, says Martin Giurfa of the University of Toulouse. But the anomalous findings, together with research showing that fruit flies and ants can form long-term memories after single experiences, aroused Giurfa’s curiosity. Was it possible that honeybees could reliably do the same? Giurfa reasoned that the ability to form long-term memories might depend on the particular type of bee and the experience. Within a honeybee colony, there are nurses, who clean the hive and feed the young; guards, who patrol and protect the hive; and foragers, who search for nectar.While previous studies have tested bees as a whole, Ciurfa and his colleagues focused on foragers, tasking them with remembering an experience relevant to their role: an odor associated with a sugary reward.The researchers observed that a single exposure to a reward-paired odor was enough for most forager bees to remember that specific odor the following day. Many foragers could even remember the odor three day later.The results do not mean that all prior research was wrong, says André Fiala of the University of Göttingen. “People have done the experiments in a different way.” Still, the new results do show that “the commonly held belief that one needs multiple training trials to achieve long-term memory is not always true,” he says, and this“really advances the field.”12. What does the author want to tell us through Paragraph 1?A. A model for memory research.B. The classification of memories.C. New research on learning and memory.D. Previous findings on memory formation.13. Which factor might influence a bee’s memory of an experience, according to Giurfa’s research?A. Whether the bee's role is related.B. Whether the bee is introduced or native.C. How often the bee repeats the experience.D. How long the bee is exposed to the reward.14. What is Andre Fiala’s attitude towards the new results?A. Doubtful.B. Favorable.C. Intolerant.D. Unclear.15. Which of the following is a suitable title for the text?A. Learning and Memory: How Honeybees RememberB. Honeybee Memory: Honeybee Knows What to DoC. Honeybees Remember after Just One LessonD. Honeybees Use Memory for Communication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。
2020届海南省海南中学高三第四次月考数学试题(解析版)
设 ，即 ，
， ，
设 ，
则 ，
令 ，则 ，
单调递增，又 ，
当 时， ，即 ，
则 在 上单调递减；
当 时， ，即 ，
则 在 上单调递增；
所以 取得极小值，也是最小值，
，
即 的最小值为 .
故选： .
【点睛】
本题考查利用导数求解函数的最值，关键是能够将所求最值转化为关于第三个变量的函数的形式，通过导数确定函数的单调性，进而确定最值点.
【详解】
， ，解得： ， .
对于 ， 的虚部为 ， 错误；
对于 ， ， 正确；
对于 ， 的共轭复数为 ， 正确；
对于 ， 对应 ，不在第四象限， 错误.
故选： .
【点睛】
本题考查复数相关定义的辨析，涉及到复数虚部定义、模长求解、共轭复数定义和对应点的坐标；关键是能够利用复数相等和复数乘法运算求得复数.
【点睛】
本题考查符合条件的集合个数，一般将符合条件的集合列举出来即可，考查分析问题和解决问题的能力，属于中等题.
2．下列函数中，与函数 有相同定义域的函数是（）
A． B． C． D．
【答案】C
【解析】根据函数定义域的要求分别判断已知和选项中的函数的定义域即可得到结果.
【详解】
函数 的定义域为 ，
对于 ， 的定义域为 ， 错误；
8．在等比数列 中，已知 ，且 ，则正整数 的值为（）
A．2B．3C．4D．5
【答案】B
【解析】可验证出当公比 时不合题意；当 时，由等比数列求和公式可构造方程求得公比，结合等比数列通项公式可求得结果.
【详解】
设等比数列 的公比为 ，
当 时， ， ， ，即 ，不合题意；
2019-2020学年高三英语11月月考试题(IV).doc
2019-2020学年高三英语11月月考试题(IV)第一部分听力（略）第二部分阅读理解(共两节,满分60分)第一节(共15小题;每小题3分,满分45分)阅读下列短文,从每题所给的四个选项(A、B、C、和D)中,选出最佳选项。
AJenny was a pretty five-year-old girl. One day when she and her mother were checking out at the grocery store, Jenny saw a plastic pearl(珍珠) necklace priced at $2.50.Her mother bought the necklace for her on condition that she had to do some housework to pay it off .Jenny agreed. She worked very hard every day, and soon Jenny paid off the necklace. Jenny loved it so much that she wore it everywhere except when she was in the shower. Her mother had told her it would turn her neck green!Jenny had a very loving daddy. When Jenny went to bed, he would read Jenny her favorite story.One night when he finished the story, he said, “Jenny, could you give me your necklace?”“Oh!Daddy, not my necklace!” Jenny said.“But you can have Rosy,my favorite doll. Remember her? You gave her to me last year for my birthday .Okay?”“Oh no, darling, that’s okay.” Her father brushed her cheek with a kiss.“Go od night, little one.”A week later, her father once again asked Jenny for the necklace after her favorite story.“Oh, Daddy, not my necklace! But you can have Ribbons, my toy horse. Do you remember her? She’s my favorite.”“No,that’s okay,” her father said and brushed her cheek again with a kiss. “God bless you, little one. Sweet dreams.”Several days later, when Jenny’s father came in to read her a story,Jenny was sitting on her bed and her lip was trembling. “Here,Daddy,” she said, holding out her hand. She opened it and her beloved pearl necklace was inside. She let itslip into her father’s hand.With one hand her father held the plastic pearl necklace and with the other he pulled out of his pocket a blue box. Inside the box was a real, beautiful pearl necklace. He had had it all along. He was waiting for Jenny to give up the cheap necklace so he could give her a real one.21. What did Jenny have to do to get the plastic pearl necklace?A. She had to help her mother do some housework.B. She had to listen to her father tell a story every night.C. She had to ask her father to pay for the necklace.D. She had to give away her favorite toys to the poor children.22.From the text we know that .A.J enny’s mother paid a lot for the plastic pearl neckla ceB. Jenny wore the necklace everywhere even in the showerC. Jenny didn’t like Rosy and Ribbons any longerD. Jenny got a real pearl necklace from her father23.Jenny’s father asked for her plastic pearl necklace repeatedly in order to .A. get it for himselfB. donate itC. train her characterD .put it away24. What can be the best title for the text?A.A Lovely GirlB. Father and DaughterC.A Pearl Necklace D .An Unforgettable ChildhoodBChristmas in the United States is traditionally a time of gift-giving and family gatherings. But small towns across the country have their own traditions.Middleburg, a small town in the state of Virginia ,is known for its horses .For more than 50 years, Middleburg has organized a yearly Christmas parade(游行).Men and women ride horses through the woods and fields. They follow hunting dogs as they search for a wild fox .But first, these hunters ride in the yearly parade, wearing their bright red hunting clothes and hats.John Hale, a citizen of Middleburg says many city people visit his town. “We have a lot of people from an urban area that come to visit ,but it incorporates a lot of the old traditions.” The night-time hay ride is one such tradition. Small groups gather under the moonlight on an open wagon filled with hay. The passengers sing as farm horses pull the wagon slowly across the fields.There are some newer traditions, too. Trey Matheu works at the nearby Salamander Resort. He says a visit to Middleburg is a chance to slow down for a day. He says Middleburg can be a calming, peaceful place without tension.“Middleburg is an opportunity to take a step back, to take a deep breath, and understand that even though life is moving on at a very fast pace, there’s really an opportunity where you’re allowed to step off for a little bit.”Parade organizers say more than 13,000 people attend even in below-freezing weather. But if you ask, you will hear many different reasons why people come to watch the parade:“I come here because I’m from a small town. I like how everybody comes together.”“I live right down that street; right there. And that’s my dog.”Middleburg looks its best at Christmas time. That may be why so many people return each year.25. Which of the following can be the best title for the text?A. Middleburg Christmas paradeB.A small town known for horsesC. Christmas traditions in MiddleburgD. Newer traditions at Christmastime26.At Christmas, people in Middleburg usually .A. visit friends and familiesB. feed farm horses with hayC. hunt for dogs in the woodsD. ride in the yearly parade27. According to Trey Matheu, why do people visit Middleburg?A. To relax themselves.B. To enjoy the fresh air.C. To escape competition.D. To challenge themselves.28. What do we know about the small town Middleburg?A. It makes a large profit from tourism.B. It attracts many people eachyear.C. It is a good place for family gatherings.D. It doesn’t respect Christmas traditions.CAs the thrills of the London 2012 Olympic Games fade, the focus now is on the 2016 Olympic Games in Brazil. Over the next two years it hosted the FIFA Confederation Cup in June 2013 and hosted the FIFA World Cup in 2014.Brazil has taken steps to increase the economic profits by safeguarding the interests of broadcasters and funders.In 2009,the Brazil passed the Brazilian Olympic Act and the so-called World Cup Law in 2012,which are designed to fight ambush(隐性)marketing and digital piracy(盗版),and regulate advertising in and around official sporting sites.The Brazilian World Cup Law goes much further in protecting the interests of right owners than Brazil’s pre-existing legislation(立法)in this area, the so-called Pele Law. For example, the World Cup Law bans anyone but the official broadcaster from using images of events. However, it does permit use for non-commercial purposes. It also requires that FIFA or its local broadcaster provide highlights up to two hours after each match. Other items allow protection of trademarks associated with the event and ban unauthorized association with the event’s marks.The Pele Law permits, as an information right, both access to sporting sites and the use of images for journalistic purposes. It is, however, unlikely that such an understanding will be gained in relation to the World Cup Law which governs access to and use of images specifically in relation to the FIFA World Cup 2014.Although the Brazilian Olympic Act regulates the IP(知识产权)relating to the 2016 Olympic Games in Rio, it remains silent on broadcasting rights.Whatever the benefits, it seems clear that IP rights in general, and broadcasting rights in particular, will continue to play a key role in bringing in funds. If past experience is anything to go by, Rio 2016 not only promises new sporting achievements, but also the breaking of new records in terms of profits produced from the sale ofbroadcasting and other media rights.29.The 2016 Olympics.A. promises to break many recordsB. will experience challenges in fundingC. promises to be the greatest in historyD. will bring great benefits to Brazil30.The World Cup Law and the Pele Law are different in that.A. the former is stricter than the latter in protecting IP rightsB. the World Cup Law allows the media more freedom to use the imagesC .the former applies to advertising while the latter marketingD .the Pele Law bans more unauthorized association with the event’s marks31.The passage mainly talks about.A .the advances that Brazil has made in hosting sporting eventsB. the efforts that Brazil is making to protect the interests of IP right ownersC. the preparations that Brazil is making for the 2016 OlympicsD. the challenges that Brazil is facing in investment to fund the sporting events32.The writer’s attitude toward Rio 2016 is.A .indifferent B. positive C. negative D. unclearDUnlike chemists and physicists, who usually do their experiments using machines , biologists and medical researchers have to use living things like rats. But there are three Nobel prize-winning scientists who actually chose to experiment on themselves—all in the name of science,reported The Telegraph.1.Werner Forssmann (Nobel prize winner in 1956)Forssmann was a German scientist. He studied how to put a pipe inside the heart to measure the pressure inside and decide whether a patient needs surgery.Experiments had been done on horses before, so he wanted to try with human patients. But it was not permitted because the experiment was considered too dangerous.Not giving up, Forssmann decided to experiment on himself. He anaesthetized (麻醉) his own arm and made a cut, putting the pipe 30 centimeters into his vein (静脉).He then climbed two floors to the X-ray room before pushing the pipe all the way into his heart.2.Barry Marshall (Nobel prize winner in 2005)Most doctors in the mid-20th century believed that gastritis was down to stress, spicy food or an unusually large amount of stomach acid. But in 1979 an Australian scientist named Robin Warren found that the disease might be related to a bacteria (细菌) called Helicobacter pylori.So he teamed up with his colleague, Barry Marshall, to continue the study. When their request to experiment on patients was denied, Marshall bravely drank some of the bacteria. Five days later, he lost his appetite and soon was vomiting each morning—he indeed had gastritis.3.Ralph Steinman (Nobel prize winner in 2011)This Canadian scientist discovered a new type of immune system cell(免疫细胞) called the dendritic cell. He believed that it had the ability to fight against cancer.Steinman knew he couldn’t yet use his method to treat patients.So in 2007,when doctors told him that he had cancer and that it was unlikely for him to live longer than a year, he saw an opportunity.With the help of his colleagues, he gave himself three different vaccines(疫苗) based on his research and a total of eight experimental therapies (疗法).Even though Steinman eventually died from his cancer, he lived four and a half years, much longer than doctors had said he would.33.The passage is mainly about .A. some dangerous experiments that Nobel prize winners did on themselvesB. difficulties that scientists went through in order to make important discoveriesC. the reasons why some scientists chose to experiment on themselvesD .three Nobel prize winners who did experiments on themselves34. Which of the following is TRUE according to the article?A. Forssmann’s experiment ended in failure.B. Forssmann managed to do his experiment on different kinds of animals.C. Barry Marshall succeeded by drinking some Helicobacter pylori.D. Barry Marshall’s experiment on himself confirmed that most doctors’ belief about gastritis was correct.35.From the text, we can conclude that Ralph Steinman .A. discovered a new type of cancer cell called the dendritic cellB. tried different therapies containing the dendritic cell on himselfC. knew that he himself would have cancer and die from itD. believed that he was better than doctors at treating cancer第二节(共5小题;每小题3分,满分15分)根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,选项中有两项为多余选项。