广东省梅县东山中学2019-2020学年高考考前提分仿真卷含解析《含高考15套》
2019-2020学年梅州市梅县高级中学高三英语模拟试卷及答案解析
2019-2020学年梅州市梅县高级中学高三英语模拟试卷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AYou might not expect it, but cows are a large source of the greenhouse gases that are driving climate change. Cows produce lots of methane by breaking down the grass, Now scientists have shown that the pollution from cows canbe reduced by adding a little seaweed to their food.Scientists first discovered that seaweed could help control methane from cows several years ago. But this work was done in a laboratory, there were many questions about whether the idea could work in real life.In the lab studies, the cows were given quite a bit of seaweed, and they would cause losing weight. That wasn't helpful, since cows are often sold by weight. It also wasn't clear if the seaweed would stop working if it was used for a longer period of time.Now, scientists from the University of California, Davis have answered several of these questions.The researchers studied 21 cows on a farm for about five months. They taught the cows to get their food from inside a special hood, which allowed the scientists to measure the methane that the cows were giving off. This time, they used a much smaller amount of seaweed, which they mixed with the cows' food.The results were surprisingly good. In some cases, the cows produced 82% less methane. The improvement depended on the kind of food the cows were given, but even the worst-polluting cows produced 33% less methane.Over the five months, the scientists didn't see any signs that the cows' stomachs were getting used to the seaweed and starting to produce more methane again.Another surprise came when they looked at the weight of the cows. The cows that were fed seaweed gained just as much weight as the other cows, but they didn't need as much food.But there are still some big problems with the idea of feeding cows seaweed. For one thing, there's notadequateseaweed to feed all of the cows in the world. So farmers would have to figure out a way to grow lots of seaweed.A bigger problem is that for most of their lives, cows live in fields, where they eat the grass. That means there's no chance to feed them seaweed every day. These problems need to be taken seriously if the world is going to avoid the worst effects of the climate crisis.Still, it's true that something as simple as feeding cows seaweed can help reduce some of the pollution causing the climate crisis.1. Why did the scientists do the experiment on the farm?A. To control the amount of seaweed.B. To record the weight cows gained.C. To confirm the effect of seaweed in real life.D. To measure the amount of seaweed cows ale.2. The underlined word “adequate” means ________ .A. commonB. specialC. lackingD. enough3. The passage is written to ________ .A. appeal to people not to raise the cowsB. encourage people to plant the seaweedC. remind people of controlling cows' weightD. call on people to take actions to reduce the pollutionBThe 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. They have 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.4. 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.5. What is the author’s attitude towards Rescue Workers?A. Hopeful.B. Respectful.C. Curious.D. Supportive.6. 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.7. What may be the best title of the passage?A. China to the RescueB. How to train CISARC. Welcome to CISARD. Rescue on requestCLike all cultural institutions, galleries and art fairs are adapting to a new reality.Art Basel Hong Kong, Asia's biggest contemporary-art fair, was cancelled because of covid-19, but anyone he who had planned to visit last week could enjoy an experimental alternative：the viewing room. At the click of a keyboard) you could enter an overall view but private visual salon, without having to brave the airless Hong Kong Convention and Exhibition Centre.There, on one webpage, was Jeff Koons riffing(翻唱)on Botticelli's "Primavera" in a tribute to the history of painting at David Zwirner Gallery. Ota Fine Arts offered one collector the chance to acquire an "infinity(无限)room“, one of the most Instagrammed artworks of recent years- the creation of the fantasies,nonagenarian (九十多岁) Japanese artist, Yayoi Kusama. White Cube presented a large collection of international works by Andreas Gursky (German), Theaster Gates (American) and Beatriz Milhazes (Brazilian). But not every artist, gallery and form showed to equal advantage in this alternative fair. Not surprisingly, simple two-dimensional works in bright colours came across best No sculpture or conceptual art was includedBesides depth and texture, there are aspects of gallery hopping that a website is unlikely to copy. Oneisserendipity—the sense of wandering between artworks and encountering the unexpected. Another is sociability. Art is a communion between artist and viewer, but galleries and fairs are also places to swap opinions and share enthusiasms.Thereare ways to compensate (or these inevitable(不可避免的)disadvantages. As they shut their physical doors, some of the world's nest galleries and museums are offering advanced interactive visits, 360 degree videos and walk around tours of their collections, allwithout queues and high ticket prices. One of the best is laid on by the Rijksmuseum in Amsterdam；its tour allows visitors to view its Vermeers and Rembrandts, including the magnicent "Night Watch”, far more closely than would normally he possible. Another standout offering is from the Museu de Arte de SPaulo, which has an even broader collection. On its virtual platform, its pain tings, spanning 700 years, appear to be hanging in an open-plan space, seemingly hung on glass panels, or "crystal easels” as the. museum calls them, ideal for close-up inspection,8. From the paragraph 3, we may knowA. "Primavera" was originally painted by JeKoonsB.“innity room” was the most popular artworks of recent years on social mediaC. White Cube displayed a great many works by artists from different nationsD. Various paintings and statues showed on the webpage are well-received9. What does the underlined word "serendipity" in Paragraph 4 probably mean?A. surpriseB. treasureC. expectationD. compromise10. What is the purpose of writing the last paragraph?A.To introduce some popular art show in the world.B. To show that there are some alternative ways to promote the display during covid-19 epidemic.C. To prove that paintings hung on glass panels can be idealfor close-up inspection,D. To release some information about some extraordinary art shows.11. What is the best title?A. Art beyond the internet.B. Fascinating art.C. Art under covid-19.D. gallery hoppingDBecoming famous is the dream of many, and Tian is getting closer to that dream.Tian, 30, is a white-collar worker inBeijing. On short video application Douyin, Tian has more than 2,000 fans. So far, she has received more than 50,000 likes on the Dubsmash-like app. On her page on Douyin, Tian shareseverything, from her son’s daily activities, to her pet dogs, to little skits (段子) made up by her and her husband. “Making funny videos, and combining them with music is really interesting,” Tian said. “Of course, I make the videos for fun because it is quite relaxing.”China’s short video market has seen great growth, according to areport. The report said thatChina’s short video market was valued at 5.73 billion yuan ($900 million) in 2017, an increase of 184 percent. The industry value is expected to go up to the 30 billion mark in 2020. Companies like Tencent, Sohu and Iqiyi have all started providing short video content.“Short videos are popular because they are an addition to traditional audio and video content on the internet,” said Sun Jiashan with the Chinese National Academy of Arts.Fans say that the short videos help them “chill out” from a stressed-out lifestyle. “My favorite videos are all about pets,” said Zhou Na, a nurse inHefei, capital of East China’sAnhuiprovince. “After a whole day’s work, watching the 15-second videos makes me laugh, which reduces my pressure.”12. Why does Tian make short videos in Douyin?A. To get fun.B. To become a well-known person.C. To attract fans.D. To record her family’s routine.13. What’s Sun Jiashan’s opinion about short videos?A. They have huge value.B. They greatly reduce people’s pressure.C. They make people’s star dreams come true.D. They enrich internet audio and video content.14. What does the underlined words “chill out” probably mean?A. Catch a cold.B. Feel cold.C. Calm down.D. Become concerned.15. What does the passage mainly tell us?A. Every Chinese is using Douyin.B. China’s short video market is open.C. Douyin brings the Chinese great happiness.D.China’s short video market has developed rapidly.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。
东山中学高考模拟卷-高考模拟
东山中学高考模拟卷-高考模拟各位读友大家好，此文档由网络收集而来，欢迎您下载，谢谢东山中学高考模拟卷第一卷一、阅读下面的一段文字，完成1一2题。
化学制剂地球上生命的历史也就是生物与它们的环境相互作用的历史。
动植物的形体和习性在很大程度上是由环境造成的，而反向作用，即生物对其所在环境的实际影响则相对较小。
只有到了20世纪，作为物种之一的人类才获得了足够的力量，有效地改变他所在的世界——大自然。
在过去的四分之一世纪里，这种力量不仅增大到令人不安的程度，而且性质也发生了变化。
人类对环境最可怕的破坏，是那些有害甚至致命的物质对空气、土地、河流、海洋造成的污染。
在当今对环境的普遍污染中，化学药品和辐射线共同改变着生物的根本性质。
喷洒在农田、森林或花园里的化学药品长期留在土壤中，进入活的生物体内，在一种毒害和死亡的连锁反应中从一个生物体传到另一个生物体。
有时候，这些化学药品会随着地下溪流神秘地流淌，直到冒出地表，通过空气和阳光的化合作用构成新形式。
植物毒死了，牲畜得病了，曾经一度纯净的井水，也给饮用它的人群造成了危害。
适应这些化学药品所需要的时间应该用大自然的尺度来衡量——人的一生太短暂，而它所要求的是若干个世纪。
但即使经过漫长的时间，人们能够奇迹般地适应了它们，也无济于事，因为各个实验室还在源源不断地冒出新的化学药品，并投入使用。
这些药品的数字实在令人震惊：每年有500种新的化学药品需要人和动物的身体以某种方式与之适应。
其后果还不容易被我们所预料，因为它完全超出了我们对生物学的理解和经验。
40年代中期以来，为了杀死老鼠等啮齿动物以及害虫、杂草而研制出来的基本化学药品就超过200种。
这些粉末、喷雾液、烟雾剂在农场、花园、森林和家庭中都普遍使用。
它们不加选择地杀死任何昆虫，不管它是“好”是“坏”。
这种剧毒物质覆盖在叶片表面上，或者滞留在土壤中，能使鸟儿不再歌唱，鱼儿不再遨游。
可是，人们使用这些药品，其目的仅仅是消灭屈指可数的几种害虫、杂草或老鼠等。
2019-2020学年梅县东山中学高三语文期末考试试卷及答案解析
2019-2020学年梅县东山中学高三语文期末考试试卷及答案解析一、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。
5月28日，十三届全国人大三次会议表决通过了《中华人民共和国民法典》。
这意味着，历时五年多的编纂，中国正式迈入“民法典时代”。
7编加附则、84章、1260个条文……从“高空坠物谁负责”“职场性侵咋预防”“遛狗不栓狗绳怎么办”等社会热点，到完善农村“土地承包经营权”、明晰企业市场交易规则等经济社会发展的重大议题第正如孟德斯鸠在《论法的精神》中说，“在民法慈母般的眼里，每一个人就是整个国家”，其重要性可见一斑。
纵观人类文明史，编纂法典是一个国家、一个民族走向繁荣强盛的象征和标志。
从1804年《拿破仑民法典》为现代意义的法典奠定基础，到1896年《德国民法典》带动制订民法典的世界风潮，编纂民法典是一个国家走向法治现代化征程上的重要里程碑。
中国特色社会主义进入新时代，人民群众对民主、法治、公平、正义、安全、环境等方面的需要日益增长，编纂一部适应时代发展、符合中国国情、反映人民意愿的民法典，恰逢其时。
尊重科学规律，民法典适应时代发展。
改革开放以来，随着科技进步、生产力水平提高，经济基础和社会结构发生巨大变化，也带来许多新的法律课题，民法典对此作出了明确回应。
例如，在人格权编中，为收集、处理个人信息确立了明确的行为规范，要遵循合法、正当、必要原则等等。
英国路透社注意到，这是中国首次确立个人隐私权和个人数据权。
建立一部内涵丰富、体例完整的民法典无异于给行业一度存在的“隐私换便利”灰色地带画上红线，更好地平衡企业与个人的利益关系。
立足本土实践，民法典符合中国国情。
民法典不仅是一个国家经济社会发展的真实写照，也是一个民族精神文化的集中体现。
民法典开宗明义指出“为了保护民事主体的合法权益，调整民事关系，维护社会和经济秩序，适应中国特色社会主义发展要求，弘扬社会主义核心价值观。
2020年广东省梅州市高考文科数学模拟试卷及答案解析
2020年广东省梅州市高考文科数学模拟试卷
一．选择题（共12小题，满分60分，每小题5分）
1．已知集合A＝{x|log2（x+1）＞0}，B＝{x|0＜x＜1}，则∁A B＝（）A．（0，1）B．（0，1]C．（1，+∞）D．[1，+∞）
2．若复数为纯虚数，则实数a＝（）
A．﹣2B．﹣1C．1D．2
3．直线y＝2x+1和圆x2+y2＝1交于A，B两点，以x轴的正方向为始边，OA为终边（O是坐标原点）的角为α，OB为终边的角为β，则sin（α+β）＝（）
A ．
B ．
C ．
D ．
4．某学校高一、高二、高三年级的学生人数分别为900、900、1200人，现用分层抽样的方法从该校高中三个年级的学生中抽取容量为50的样本，则应从高三年级抽取的学生人数为（）
A．15B．20C．25D．30
5．如图所示，已知双曲线的右焦点为F，双曲线C的右支上一点A，它关于原点O的对称点为B，满足∠AFB＝120°，且|BF|＝3|AF|，则双曲线C的离心率是（）
A ．
B ．
C ．
D ．
6．已知向量满足，则＝（）
第1 页共23 页。
2020届梅县东山中学高三英语模拟试卷及参考答案
2020届梅县东山中学高三英语模拟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AFour Best Hikes in the WorldThere's nothing like getting out and getting some fresh air on a hike. No matter whether your idea of a hike is a leisure walk or climbing the highest mountain on Earth, we've got you covered. Below are four best hikes inthe world.Torres del Paine W CircuitLocation (位置): Patagonia. ChileDistance: 37 + milesTime: 5~6 daysBest time to go: October to JanuaryThe W Circuit is one of the most recommended hikes you'll find. Not only will you appreciate the diverse landscapes and striking granite pillars (花岗岩柱子), but you'll probably meet some new friends along the way.Grand Canyon Rim - to - Rim HikeLocation: Arizona, the United StatesDistance: 48 milesTime: 1~3 daysBest time to go: May to June, September to OctoberThere's no better way to experience one of the greatest wonders in the world. Located in one of the USA's most beautiful parks, the views are ly appealing. Just make sure you're prepared for the challenge.Trek to PetraLocation: JordanDistance: 47 milesTime: 5~ 6 daysBest time to go: October to AprilTake the road less traveled through the Kingdom of Jordan and experience one of the seven wonders of the world. Hike through canyons, gorges and ridges, and see tombs and temples along the way all while avoidingcrowds of tourists.Yosemite Grand TraverseLocation: California, the United StatesDistance: 60 milesTime: 6~7 daysBest time to go: July to SeptemberKnown for some of the best hiking in the world, Yosemite National Park is famous for its views and huge sequoia (红杉) trees. Praised byNational Geographic, the Yosemite Grand Traverse will take you through waterfalls and green mountaintops.1.Which of the following is the best time for the hike in Patagonia, Chile?A.AprilB.MayC.AugustD.December2.Where should you go for a less crowded hike?A.JordanB.Patagonia, ChileC.Arizona, the United StatesD.California, the United States3.What can you do along the Yosemite Grand Traverse?A.Plant sequoia treesB.Appreciate waterfallsC.Visit local templesD.Climb granite pillarsBTen years ago, I set out to examine luck. I wanted to know why some people were always in the right place at the right time, while others consistently experienced ill fortune. I placed advertisements in national newspapers asking for people who felt consistently lucky or unlucky. Hundreds of extraordinary men and women volunteered for my research. Over the years I have interviewed them, monitored their lives and had them take part in various experiments.In one of the experiments, I gave both lucky and unlucky people a newspaper, asking them to look through it and tell me how many photographs were inside. I had secretly placed a large message halfway through the newspaper, saying, “Tell the experimenter you have seen this and you will win $50.” This message took up half of the page and was written in type that was more than two inches high. It was staring everyone in the face, but the unlucky people tended to miss it and the lucky people tended to spot it.Unlucky people are generally more nervous than lucky people, and this anxiety affects their ability to notice the unexpected. As a result, they miss opportunities because they are too focused on looking for something else.They go to gatherings concentrating on finding their perfect partners and miss opportunities to make good friends. They look through newspapers determined to find certain types of job advertisements and miss other types of jobs.Lucky people are more relaxed and open, and therefore see what is there rather than just what they are looking for. My research eventually showed that lucky people are skilled at noticing opportunities, make lucky decisions by listening to their intuition (直觉), are open to new experiences, and adopt a never-say-die attitude that transforms bad luck into good luck.4. What’s the purpose of the author’s research?A. To discover what luck means to people.B. To find lucky people and unlucky people.C. To distinguish between good luck and bad luck.D. To figure out why people are always lucky or unlucky.5. Why did the unlucky people miss the message in the experiment?A. There was too much information to be read in detail.B. They were too focused on looking for photographs.C. It took too much time to go through newspapers.D. The words were too small to be noticed.6. What leads to lucky people’s good fortune?A. Their ability to spot opportunities.B. Their ability to become relaxed.C. Their ability to communicate.D. Their ability to make friends.7. What’s the key message of the last paragraph?A. What lucky people are looking for.B. How lucky people generate good luck.C. What lucky people can do with opportunities.D How lucky people transform bad luck into good luck.CIn the world of Chinese archaeology(考古学), a sign of a dig's importance is the sight of Zhou Mingsheng at work. A field technician who has worked at archaeological sites all aroundChina. Master Zhou iscredited with the gentlest touch in his profession. Born into a farming family, he is a “national-level craftsman” with a talent for using simple tools to get relics(遗物) that wouldcrumblein other hands, says his current boss, Wang Xu, director ofan archaeological site at Shuanghuaishu, a Neolithic(新石器时代的) settlement near the Yellow River in the central province of Henan.It is not beauty that attracts visitors to Shuanghuaishu. At 5,300 years old, the settlement is the work of a culture too simple to have left behind many buried treasures. The single most precious find, to date, is a finger-length sculpture of a silkworm. Nor is the setting lovely: an area surrounded by deafening insects, between a highway and two power stations. Rather, the site's importance is historical. For since the birth of Chinese archaeology in the 1920s, it has been inseparable from claims thatChinahas the oldest unbroken civilisation on Earth.Leading archaeologists say that the site has the right combination of location, age and distinctive cultural elements to be the capital of an early Chinese kingdom. That would make it a bridge betweenChina's written history and the era of the Yellow Emperor, who is said to rule over these central plains almost 5,000 years ago, though many foreign scholars doubt his existence. Chinese media call the site proof ofChina's 5,000 years of history.Foreigners complain about a lack of written records, Mr. Wang notes. Perhaps they are missing symbols that will one day be understood, for instance in patterned pottery. Outsiders “can't keep using Western standards to apply to Chinese ruins,” he argues.8. What does the underlined word “crumble” in Paragraph 1 mean?A. Break.B. Start.C. Wait.D. Shine.9. Why does Shuanghuaishu attract visitors?A. It has appealing scenery.B. It has various precious treasures.C. It is of great historical significance.D. It is easily accessible.10. What is Mr. Wang's attitude towards foreigners’ view?A. Unconcern.B. Disapproving.C. Supportive.D. Not mentioned.11. What does the passage mainly talk about?A. Chinese history amazes the world.B. Chinese archaeology catches on.C. China follows its tradition.D.Chinadigs its past.DThe beach may seem like an inviting place to run on a cool summer morning, but is running on the sand good for your body? It can be, but it’s important to be aware of the challenges that some beach runners experience before you get ready.Running on the beach can be a good thing. It’s certainly different from running on a track or a pavement. For starters, sand can be a challenge because it has an uneven (不平坦的) surface. As you push off, you’re going to lose some of your push as the sand moves. So, you’re not going to be able to push yourself forward as you would on a track or a pavement. But this unevenness has anupside: It gives your body an extra workout, forcing you to exercise muscles that don’t get as much use during runs on firm surfaces. For example, your feet, ankles and lower back might feel sorer and more tired than usual after a beach run just because the surface is constantly moving and changing step to step.You also might feel sore afterward because beaches tend to slope (倾斜) down to the water. If you’re going for a long run on the beach, you might notice that one side of your body might feel sorer because you’re putting more pressure on it due to the slope.Some beach runners prefer to run barefoot — not wearing anything on feet. However, if you’re not used to barefoot running, start slowly and don’t run long distances at first. That’s because running barefoot uses more different muscles than running with shoes does, and it’s important to strengthen these muscles and adapt your feet. If you want to run barefoot and as long as you run carefully enough into it, go for it!Running on the sand can be a smart choice for you, because running on softer ground surfaces can reduce muscle damage.12. Why is it difficult to run on the beach for starters?A. The soft surface makes people fall over easily.B. People need to run carefully on its smooth surface.C. Running on its uneven surface takes much effort.D. It’s hard to keep one’s balance on its hard surface.13. Which of the following best explains “upside” underlined in Paragraph 2?A. Advantage.B. Reason.C. Character.D. Challenge.14. What’s the author’s attitude to barefoot running?A. Critical.B. Supportive.C. Doubtful.D. Uncaring.15. The passage can probably be found in ______.A. A primary school textbookB. A tourist guideC. A sports magazineD. A scientific report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。
《加16套高考模拟卷》广东省梅州市东山中学2019-2020学年高考冲刺模拟物理试题含解析
广东省梅州市东山中学2019-2020学年高考冲刺模拟物理试题一、单项选择题：本题共6小题，每小题4分，共24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、如图所示，N 匝矩形导线框以角速度ω绕对称轴OO '匀速转动，线框面积为S ，线框电阻、电感均不计，在OO '左侧有磁感应强度为B 的匀强磁场，外电路接有电阻R ，理想电流表A ，则：（ ）A ．从图示时刻起，线框产生的瞬时电动势为sin e NB S t ωω=B ．交流电流表的示数24I NBS Rω= C ．R 两端电压的有效值2U NBS ω=D ．一个周期内R 的发热量()2NBS Q R πω=2、一束由a 、b 两种单色光组成的复色光射向玻璃制成的三棱镜，通过三棱镜的传播情况如图所示。
关于a 、b 两种单色光，下列说法正确的是（ ）A ．玻璃对a 色光的折射率大于对b 色光的折射率B ．a 色光的光子能量小于b 色光的光子能量C ．a 色光在玻璃中的传播速度比b 色光小D ．a 色光发生全反射的临界角比b 色光小3、国务院批复，自2016年起将4月24日设立为“中国航天日”。
1970年4月24日我国首次成功发射的人造卫星东方红一号，目前仍然在椭圆轨道上运行，如图所示，其轨道近地点高度约为440km ，远地点高度约为2060km ；1984年4月8日成功发射的东方红二号卫星运行在赤道上空35786km 的地球同步轨道上。
设东方红一号在近地点的加速度为a 1，线速度为v 1，环绕周期为T 1，东方红二号的加速度为a 2，线速度为v2，环绕周期为T2，固定在地球赤道上的物体随地球自转的加速度为a3，自转线速度为v3，自转周期为T3，则a1、a2、a3，v1、v2、v3，T1、T2、T3的大小关系为（）A．T1>T2=T3B．a1>a2>a3C．a3>a1>a2D．v1>v3>v2θ>．小球自M点由静止滑下，小球经过4、如图所示，同种材料制成的轨道MO和ON底端由对接且aO点时无机械能损失，以v、s、a、f分别表示小球的速度、位移、加速度和摩擦力四个物理量的大小．下列图象中能正确反映小球自M点到左侧最高点运动过程的是( )A．B．C．D．5、有三个完全相同的重球，在每个球和水平面间各压了一块相同的木板，并都与一根硬棒相连，棒的另一端分别与一铰链相连，三个铰链的位置如图甲、乙、丙所示。
广东省梅州市梅县高级中学2019-2020学年高三数学理模拟试卷含解析
广东省梅州市梅县高级中学2019-2020学年高三数学理模拟试卷含解析一、选择题：本大题共10小题，每小题5分，共50分。
在每小题给出的四个选项中，只有是一个符合题目要求的1. 曲线在点(1，2)处的切线方程为()A．y＝3x－1 B．y＝－3x＋5 C．y＝3x＋5 D．y＝2x参考答案：2. 复数的共轭复数为( )参考答案：C略3. 设抛物线上一点P到y轴的距离是4，则点P到该抛物线焦点的距离是（）A. 4B. 6C. 8D. 12参考答案：试题分析：先根据抛物线的方程求得抛物线的准线方程，根据点P到y轴的距离求得点到准线的距离进而利用抛物线的定义可知点到准线的距离与点到焦点的距离相等，进而求得答案．解：抛物线y2=8x的准线为x=﹣2，∵点P到y轴的距离是4，∴到准线的距离是4+2=6，根据抛物线的定义可知点P到该抛物线焦点的距离是6故选B4. 公元263年左右，我国数学家刘徽发现当圆内接正多边形的边数无限增加时，多边形面积可无限逼近圆的面积，并创立了“割圆术”．利用“割圆术”刘徽得到了圆周率精确到小数点后两位的近似值3.14，这就是著名的“徽率”．如图是利用刘徽的“割圆术”思想设计的一个程序框图则输出的值为（）（参考数据：sin15°≈0.2588，sin7.5°≈0.1305）A．6 B．12 C．24 D．48参考答案：C【考点】EF：程序框图．【分析】列出循环过程中S与n的数值，满足判断框的条件即可结束循环．【解答】解：模拟执行程序，可得：n=6，S=3sin60°=，不满足条件S≥3.10，n=12，S=6×sin30°=3，不满足条件S≥3.10，n=24，S=12×sin15°≈12×0.2588=3.1056，满足条件S≥3.10，退出循环，输出n的值为24．故选：C．【点评】本题考查循环框图的应用，考查了计算能力，注意判断框的条件的应用，属于基础题．5. 已知长方形ABCD，抛物线以CD的中点E为顶点，经过A、B两点，记拋物线与AB边围成的封闭区域为M.若随机向该长方形内投入一粒豆子，落入区域M的概率为P.则下列结论正确的是（）A．不论边长如何变化，P为定值B．若的值越大，P越大C．当且仅当时，P最大D．当且仅当时，P 最小参考答案：A略6. 函数y=cos2（x﹣）是（）A略7. （09年宜昌一中10月月考理）下列函数中，有反函数的是（）A.B.C.D.参考答案：B8. 已知，则的值为A.-3B. 3C. -3或3D. -1或3参考答案：D9. 在展开式中，含项的系数是（）A．1 B．－1 C．－5 D．5参考答案：B10. 阅读右图所示的程序框图，运行相应的程序，输出的结果是A．123 B.38 C．11 D．3参考答案：C二、填空题:本大题共7小题,每小题4分,共28分11. 一次研究性课堂上，老师给出函数，甲、乙、丙三位同学在研究此函数的性质时分别给出下列命题：甲：函数为偶函数；乙：函数；丙：若则一定有你认为上述三个命题中正确的个数有个参考答案：212. 若曲线在点处的切线与直线垂直，则____.参考答案：略13. 按如下图所示的程序框图运算，若输出，则输入的取值范围是．参考答案：我们构造数列，为循环过程中x的值，则，所以，所以，要满足输出，则，即，解得，所以输入的取值范围是。
2020年梅县东山中学高三语文模拟试卷及参考答案
2020年梅县东山中学高三语文模拟试卷及参考答案一、现代文阅读（36分）(一)现代文阅读I(9分)阅读下面的文字，完成下列小题。
材料一：中青报：在书房写作和在其他地方写作，感觉有什么不同？冯骥才：作家的书房，是作家最不设防的地方，因为你的一切想象、思想在书房里都是赤裸裸的，都要真诚地表达出来，读者不需要看一个虚假的字。
同时，书房又是作家向外射子弹的战壕，是安顿自己心灵的地方，是诗情画意的地方。
中青报：你觉得中国文人的书房有什么共同的特质吗？冯骥才：中国文人的书房，我觉得有两个特质：一是很强的书卷气，没有浮夸没有享受，是一个纯精神的地方；二是琴棋书画，中国人讲究触类旁通，屋子里一般有一些相关的东西。
中青报：你去过别人家的书房吗？喜欢谁家的书房？马骥才：我进过不少作家的书房，从冰心、孙犁到贾平凹，我相信那里的一切都是作家性格的外化，或者就是作家的化身。
(摘自《冯骥才：书房是作家不设防的写作场》)材料二：书房，是传统中国社会最重要的生活空间之一。
书房不但为历代中国知识分子提供了一个修身养性、读书抚琴的处所，还为他们实现修身齐家、治国平天下的理想助力。
早在汉代，文学家张衡就曾称赞自己的书房可“弹五弦之妙指，咏周、孔之图书，挥翰墨以奋藻，陈三皇之轨模”。
可见在中国传统文化中，书房本身就是一个具备艺术体验、阅读写作与围书收藏等多元功能的空间。
不同的书房，代表了不同的中式生活美学。
科举取士本是中国古代知识分子长期以来实现政治抱负的唯一通道。
一些文人墨客却因时运不济、命途乖蹇，不是屡试不第就是遭受打压，不得不寄情于山水与诗酒之间，形成了中式生活美学体系中的重要一环：名士之美。
名士们的书房必有另一番情趣。
最知名的当是唐代诗人刘禹锡的“陋室”。
这间因千古名篇《陋室铭》而流芳百世的书房，见证了刘禹锡等名士们的生活美学。
既是“陋室”，当然不求气派奢华，也不求满壁藏书，不必有“丝竹”声这种奢侈品，更不能堆满案牍公文，变成一间要务繁忙的办公室，但一定要具备“台痕上阶绿，草色入帘青”的自然朴实，要有“鸿儒”们的雅集，从而满足名士们清新淡雅的精神需要。
2019-2020学年梅县东山中学高三英语模拟试卷及答案解析
2019-2020学年梅县东山中学高三英语模拟试卷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AOn the 100th anniversary of the Communist Party of China (CPC), red tourism has gained popularity among tourists who flood in to visit historic sites with a modern revolutionary heritage.JinggangshanThis is one of the most crucial and splendid chapters of history of establishing Red China as well as a unique and wonderful ecosystem, which is covered with rich forest, rugged peaks and several memorials to the Red Army. The best time to visit is between April and October, with the most temperature timing April and May when the large azaleas (杜鹃花) bloom.Open: 8:00-17:00 (Feb. 16-Nov. 15). 8:00-16:30 (Nov. 16-Feb. 15)XibaipoIt is an old revolutionary base where the leadership of the Communist Party of China was stationed, drawing up the blueprint for a new country. A memorial hall was built to honor the memory of this site. The lake and the hill here add brilliance and beauty to each other and form pleasant scenery.Open: Tuesdays to Sundays 9:30-17:00 (Xibaipo Memorial Hall)The Nanhu Revolutionary Memorial HallA new exhibition is held with updated display approaches, including phantom imaging (全息影像) and oil painting, which are used to improve visitors' experiences. The exhibition shows four stages of the CPC from its establishment to its achievements.Open: Tuesdays to Sundays 8:30-18:00 (closed on Mondays)Former Site of the Editorial Department ofNew YouthNew Youthstarted the New Culture Movement and spread the influence of the May Fourth Movement. The site was briefly based in Beijing but moved back to Shanghai in 1920 and also served as the office for the Communist Party of China Central Committee in the 1920s.Open: Thursdays to Tuesdays 9:00 - 11:30, 13:30 - 16:30 (closed on Wednesdays)1. Where would visitors learn more about the history of the Red Army?A. Jinggangshan.B. Xibaipo.C. The Nanhu Revolutionary Memorial Hall.D. Former Site of the Editorial Department ofNew Youth.2. What do we know about the Nanhu Revolutionary Memorial Hall?A. It focuses on Chinese achievements in art.B. It mainly advertises the coming anniversary.C. It applies modernized methods to the exhibition.D. It briefly introduces the rise and fall of Nanhu.3. When can tourists visit Former Site of the Editorial Department ofNew Youth?A. At 1:00 p.m. on Mondays.B. At 9:00 a.m. on Wednesdays.C. At 2:00 p.m. on Fridays.D. At 5:00 p.m on Sundays.BThe Rise of Voice TechnologyVoice technology has come a long way. Just a few years ago, it would have been unusable. But now, those who follow the technology know that it has got considerably better.Writing with your voice raises several interesting questions. How difficult is it actually? Human speech involves a lot more starting and stopping with errors and the need for repairing broken sentences than you may think. Even gifted speakers make mistakes. To turn the spoken word into reasonable writing requires lots of planning. You’ll need some kinds of notes or other organisers to make it work.Another question turning speech into writing raises is the style. How would writing make the change that people speak their writing rather than type? Chances are that it would come up with many more short sentences and more concrete language, which is good. It would probably also rely on prepared phrases a lot more often, which is not available when you are speaking quickly.To confirm this, a column was not written, but dictated (听写). It was composed from brief notes written down for structure only, and it was edited for length, with all of the original errors kept in. Here were the results. The first was that the literal accuracy was extremely high. There weren’t many cases wherethe software had heard one word incorrectly and written down another. But the other result was that the readability of this column was rather bad. Obviously, the blame is not with the technology at all, which turns out to be rather good. Speaking into writing relies on a better human brain than the one we currently possess. Writing is hard. There’s a reason it can’t be done at the speed of speech, in real time.To clarify the matter, this time paragraph breaks were added after the whole writing. Punctuations (标点) had to be spoken aloud, and after a full stop, the first word in the new sentence was capitalized automatically. Some minor punctuation marks were added to make it clearer. To improve accuracy, people “trained” the software beforehand, reading a prewritten passage aloud. Actually it turns out to be more effective. All of these ensure the satisfactory completion of turning speech into writing.Language is the most important tool for human interaction, and voice is one beautiful part of language. With the maturity of modern technology, it has given birth to a great change in the human-computer voice interaction.4. According to the passage, which helps to turn speech into writing in terms of style?A. There is careful planning in advance.B. Errors and broken sentences are avoided.C. People type words as fast as they say them.D. The writing contains more prepared phrases.5. To achieve better results, the author mentions some changes for ______.A. processing errors in a column.B. adding minor punctuation marks.C. increasing the number of brief notes.D. integrating short paragraphs in writing.6. The author suggests that ______.A. human brains are responsible for poor dictated writing.B. writing with voice promises to improve the quality of writing.C. writing is an unnatural act that can hardly be learned and improved.D. technology has a long way to go in the human-computer voice interaction.7. What is the passage mainly about?A. Why people fully intend to turn speech into writing.B. What role voice technology plays in improving readability.C. Where the human-computer voice interaction is at an advantage.D. How voice technology enables the change from speech into writing.CSurfing the Internet for fun will make you a better employee, according to an Australian study.The University of Melbourne study shows that people who use the Internet for their own reasons at work areabout 9 percent more productive than those who do not. Study author Brent Coker said, “Surfing the Internet at times helps increase an employee's attention.”“People need to relax for a bit to get back their attention,” Coker said on the university's website. “Having a short break, such as a quick surfing of the Internet, helps the mind to rest itself, leading to a higher total Internet attention for a day's work, and as a result, increases productivity (生产效率),” he said.According to the study of 300 workers, 70 percent of people who use the Internet at work surf the Internet for their own reasons during office hours. Among the most popular surfing activities are searching for information about products, reading online news, playing online games and watching videos. “Firms spend a lot of money on software toblocktheir employees from watching videos, using social networking sites or shopping online,” said Coker. “That's not always a good idea.”However, Coker said the study looked at people who surfed the Internet in moderation (适度), or were on the Internet for less than 20 percent of their total time in the office. “Those who spend too much time surfing the Internet will have a lower productivity than those without.” he said.8. What does the University of Melbourne study mainlyshow?A. People who surf the Internet are good employees.B. Not everyone surfs the Internet for fun during office hours.C. The Internet is becoming more and more important in people's life.D. Surfing the Internet for fun at times during office hours increases productivity.9. Which of the following is NOT mentioned in the passage as one of the most popular surfing activities?A. Watching videos.B. Reading online news.C. Reading online novels.D. Playing online games.10. The underlined word “block” in Paragraph 4 means “________”.A. stopB. organizeC. protectD. separate11. What can we infer from the last paragraph?A. Those who never surf the Internet have the lowest productivity.B. Spending too much time surfing the Internet reduces productivity.C. Most people don't surf the Internet in moderation during office hours.D. People should spend as little time as possible surfing the Internet.DIn recent years, with the development of technology, it is common to see robots into our homes in the form of toys and vacuums (吸尘器) without question. Children’s toys that rely on robotics for both entertainment and education are becoming more popular and more easily accessible. Robot vacuums, too, are so popular that the Roomba has even earned itself a name in popular television.A selection of other household wares can be purchased and owned for a reasonable cost, but they all look and perform like vacuums. Our domestic helpers are currently designed to vacuuming, mopping, sweeping and mowing.Of course the best known of these is the Roomba, but there is actually some competition amongst the autonomous vacuum manufacturers. Roomba, made by iRobot, now comes in several designs and has been through many versions of improvements. The basic model is just about $400, but there’s a more attractive version, complete with a wireless command center to control the robot from anywhere in the home. Samsung also has a vacuum, called the Smart Tango, which makes increased improvements on the Roomba by including brushes for cleaning corners. It’s possible that some of the less well-known vacuums might be even more exciting, like the Neato Robotics XV that takes on a square shape to better clean corners. Incremental (增值的) improvements are what drive the home robot industry.Now that domestic robots are becoming more popular, the near future should be exciting. If we are going to welcome robots into our lives and our homes, we should expect them to work for it, and work hard. It’s the dawn of the robot revolution, whether we like it or not, and it would be great to see that technology put to use in more innovative(创新的) ways.12. What does Roomba in the passage mean?A. A man’s name who has bought a domestic robot.B. A name of a big company who makes robots.C. A type of vacuum whose name is Roomba.D. A place where people can buy proper robots.13. The Smart Tango is different from other types in that ________.A. it has a wireless command centerB. it has brushes for cleaning cornersC. it is more famous and excitingD. it is driven without electricity14. What can we infer according to the last paragraph?A. Domestic robots will free us from housework.B. Domestic robots will become cheaper and cheaper.C. Domestic robots have brought environmental revolution.D. Domestic robots takes the lead in science and technology.15. What does the author intend to tell in the passage?A. Domestic robots are closely related to our daily life.B. It is interesting to see domestic robots at home.C. Domestic robots are too expensive for most people.D. It is convenient to buy a domestic robot.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学年梅县东山中学高三英语模拟试卷及答案解析
2019-2020学年梅县东山中学高三英语模拟试卷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AConsumer Electronics Show (CES) is a global stage where the world’s next-generation inventions are introduced towards the marketplace, and lots of companies are participating. Here are several of the amazing inventions that were introduced at the showin 2020.August Wi-Fi Smart LockIt's an intelligent door lock to protect your home, and it works on Wi-Fi. The lock doesn’t require any additional hardware to attach to it and can be used with the existing door lock. The owner can remotely access the door from anywhere to lock or unlock and can provide guest keys to family or friends. It keeps statistics and records of your door’s “lock”, “unlock”, and who have visited.Motion PillowIt’s a pillow developed for anyone who has a snoring (打鼾) problem. The solution box detects, records, and analyses the sleeping person’s snoring patterns. By changing the internal airbag’s pressure, it fixes the position of the sleeping person’s neck and head gently to improve his breathing. Three layers of noise-reducing material minimize the user’s sleeping disturbance.Ao AirIt’s a high-tech face-covering wearable air purifier with no tight seal on the mouth and nose. The purifier pulls air inside through a filtration (过滤) process and uses fans to createa clean area in front of the device. It’s designed in such a way that it can clean more than 98 % of PM2.5 through filtration.Transparent HoodThe company Continental showed off this revolutionary invention at CES 2020 that got the Best Vehicle Intelligence and Transportation Award. It’s a technology that gives the driver the ability to see barriers and blind spots from the driving seat. Four cameras take surrounding pictures so that the driver can see the real-time blind spots and prevent even parking damage too.1.Who is the text mainly intended for?A.The general public.B.The science lovers.C.The electronic companies.D.The college students.2.Which of the following descriptions of Motion pillow is correct?A.It’s intended for all those who can’t sleep well.B.It can help sleepers breathe smoothly.C.It can remove the noise around to help people sleep.D.Its pressure is changed by sleepers themselves.3.What can we infer from the text?A.August Wi-Fi Smart Lock helps improve the safety of homes.B.Ao Air produces fresh air for its users.C.Motion Pillow reduces material to minimize sleeping disturbance.D.Transparent Hood helps make driving safer and easier.BIn order to help discover spoilage and reduce food waste for supermarkets and consumers, researchers have developed new low-cost, smart phone-linked, eco-friendly spoilage sensors for meat and fish packaging.One in threeUKconsumers throw away food just because it reaches the use-by date, but 60% of the £12.5 billion-worth of food we throw away each year is safe to eat.The researchers, whose findings were published in ACS Sensors, say the sensors could also eventually replace the use-by date—a widely used indicator of being fresh and eatable.The sensors cost two US cents each to make. Known as “paper-based electrical gas sensors (PEGS)”, they detect spoilage gases like ammonia (a poisonous gas with a strong unpleasant smell) in meat and fish products. The information provided by the electronic nose is received by a smart phone, and then you can know whether the food is fresh and safe to eat.The Imperial College London researchers who developed PEGS made the sensors by printing carbon electrodes onto a special type of paper. The materials are eco-friendly and harmless, so they don’t damage the environment and are safe to use in food packaging. The sensors, combined with a tiny electronic system, then inform nearby mobile devices, which identify and understand the data about spoilage gases.Lead author Dr Firat Guder of Imperial’s Department of Bioengineering, said, “Although they’re designed to keep us safe, use-by dates can lead to eatable food being thrown away. They don’t always reflect its actual freshness. In fact, people often get sick from food-borne diseases due to poor storage, even when an item is within its use-by date.”“These sensors are cheap enough so we hope to see supermarkets using them within three years. Our goal isto use PEGS in food packaging to reduce unnecessary food waste.”The authors hope that PEGS could have applications beyond food processing, like sensing chemicals in agriculture, air quality, and detecting disease markers in breath like those involved in kidney disease.4. What is the function of PEGS according to the text?A. To improve the taste of foods.B. To improve the service of stores.C. To help supermarkets store foods.D. To help people test food freshness.5. What role does the smartphone play while PEGS are functioning?A. It acts as an electronic nose.B. It reads the data collected by PEGS.C. It helps print the gas sensors onto paper.D. It discovers the spoilage gases from foods.6. What does Dr. Firat Guder say about use-by dates?A. They are not completely reliable.B. They can help reduce food waste.C. They are based on scientific research.D. They are not accepted by the consumers.7. What does the author mainly talk about in the text?A. The process of researching spoilage sensors.B. A new technology in packaging to reduce food waste.C. The application of spoilage sensors beyond food processing.D. The influence of use-by dates on supermarkets and consumers.CChimps use loud calls and gestures to make their feelings known but until now, the exact meaning for individual movements has remained a mystery. Now researchers believe they have translated the key gestures used in the chimp community and identified their intentions for the first time.From 4,351 gestures, experts were able to identify 66 that are used for 19 specific message meanings, including showing a foot to tell a child they can climb on their back. The researchers were able to narrow down these 66 gestures to 36 that are used intentionally to achieve 15 purposes. The translations were made by Dr Catherine Hobaiter and her colleagues at St Andrews University in Scotland.Dr Hobaiter used behavior sampling and filmed all recorded cases of gestural communication. Other gesturesinclude stomping their feet to ask another chimp to stop what they are doing, and slapping objects together to ask another to follow them. Of the 19 meanings,17 encouraged interactions to start, or to develop, such as “move closer,” and “change play”. Some of the gestures were found to have more than one meaning. and only 10 of the 66 gestures were used for only a single meaning.Researchers collected a total of 471 video clips from two social groups of chimps at a shelter near Kinshasa, Democratic Republic of Congo. As well as identifying what the gesture means, they also discovered the technique needed to increase the chances of success.“Human children use gestures to communicate before they produce their first words, and their earliest gestures typically appear around 10 months of age,” explained the researchers. “In great apes, there is good evidence that language-trained individuals are capable of acquiring and understanding signals, but this is far less clear in their natural communication. ”8. Chimps slap the objects to____________.A. tell others to stop what they are doingB. ask others chimps to join themC. gather other chimps to move closerD. encourage interactions to start9. What did researchers find after studying 471 video clips?A. Chimps trained in language are good at understanding signals.B. Two social groups of chimps live at a shelter near Kinshasa.C. Language-trained individuals do well in natural communication.D. Chimps’earliest gestures appear around 10 months of age.10. How is the last paragraph developed?A. By analyzing causes.B. By examining differences.C By making comparisons. D. By following time order.11. What can be a suitable title for the text?A A New Research on Chimps B. Human Children and ChimpsC. Getting the Chimps Trained for LanguageD. Translating the Sign Language of ChimpsDWhen rescuers were called to rescue a “little owl”, they did not expect to find one that was too fat to fly. A concerned citizen first spotted the poor bird lying helplessly. Even Rufus Samkin, whose team then took the team in on Jan.3, believed the bird to be injured. There were no wounds to be found, however, causing experts to believe the female owl was simply too wet to fly.But it was only after a thorough drying-off and complete checkup that they noted the real issue. The rescuers weighed the owl and concluded that she was “simply extremely obese” and couldn’t take off. This additional weight left her unable to fly, though experts began to wonder how she got so fat in the first place. Because it’s rather unusual for wild birds to reach such a state, they decided to keep her a few weeks and monitor her.In the end, the rescuers assessed that it was simply a case of “natural obesity”. December 2019 was quite warm, which meant that there were many insects for the bird to feast upon. Indeed, the owl was discovered in a field that was “filled with field mice” due to the usual climate. “It’s been very mild here, and the owl is able to find foods easily,” Samkin explained. With the sudden food, “she ly ate much and got very fat. She had a lovely time, but went too far.”The researchers consequently put the owl on a “strict diet” so she could shrink to a more “natural weight”. She was even put on a bit of exercise and encouraged to fly around. In the end, the bird was sent flying gracefully off into the British countryside at a much healthier and happier weight. Hopefully, this owl won’t come upon another feast of field mice—unless she wants another few weeks at the fat camp.12. What did people think happened to the owl at first?A. She was hurt.B. She was trapped.C. She was hungry.D. She was wet.13. Why was the bird unable to fly?A. She needed a thorough checkup.B. She should be given a drying-off.C. She was completed overweight.D. She was simply extremely strong.14. What made the owl have enough foods?A. The especially warm weather.B. The reducing number of insects.C. The rich fields growing crops.D. The lovely time the bird enjoyed.15. How did the owl loseits weight?A. Going on a diet and exercising.B. Flying in the British countryside.C. Visiting that fat camp again.D. Enjoying her wonderful feast freely.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届东山中学梅县新城分校高三英语模拟试题及答案解析
2020届东山中学梅县新城分校高三英语模拟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AMany workers have had no choice but to adapt to working from home in recent months since offices shut down due to the COVID-19 pandemic (新冠疫情). And the noisy situation and endless housework may result in a terrible emotion. A new option is waiting foryou. That is WFH: work from a hotel.Hotel FigueroA special program titled Work Perks aims to reposition some of 94-year-old Hotel Figuero’s 268 rooms as day-use offices.According to Managing Director Connie Wang, the set-up launched in June and is a great opportunity to get out of their houses with high-speed Wi-Fi, unlimited printing privileges and free parking. The 350-square-foot rooms sell for $ 129 per day, with an option to extend to an overnight stay for an additional $ 20.The WytheA boutique hotel in Brooklyn. The hotel recently announced a partnership with co-working office space company Industrious through which it is recycling 13 second-story guest rooms to serve as offices for up to four people.Each of the rooms has a small outdoor platform, and dogs are welcome. Pricing starts at $ 200 and goes up to $ 275, depending on how many people use the space.The SawyerThe Sawyer, in Sacramento, California, is offering pool cabanas (更衣室) for use as outdoor offices, complete with fast Wi-Fi, free parking and catered lunch for $ 150 per day.HotelsByDayYannis Moati founded HotelsByDay back in 2015. That company has grown to include more than 1,500 hotels, and has seen a significant increase in the number of inquiries for day-use bookings lately.Moati said the current situation will force hotels to upgrade themselves to stay alive, and he predicted that offering rooms for day-use only is one of the directions they will go.1.How much should one pay for a 24-hour stay in Hotel Figuero?A.$ 129.B.$ 149.C.$ 150.D.$ 200.2.Which hotel allows pets in?A.The Wythe.B.The Sawyer.C.HotelsByDay.D.Hotel Figuero.3.What do we know about Yannis Moati?A.He started a program titledWork Perks.B.He has upgraded at least 1,500 rooms.C.He usually predicts everything correctly.D.He is optimistic about the WFH trend.BAddiction to smartphones will result in poor sleep, according to a new study.The study, published Tuesday in Frontiers in Psychiatry, looked at smartphone use among 1,043 students between the ages of 18 and 30at King's College London. Researchers asked the students to complete two questionnaires on their sleep quality and smartphone use, in person and online.Using a 10-question scale that was developed to judge smartphone addiction in children, nearly 40% of the university students qualified as "addicted" to smartphones, the study found. “Our findings are in agreement with other reported studies in young adult populations globally, which are in the range of 30-45%,” lead author Sei Yon Sohn and her co-authors wrote in the study. "Later time of use was also significantly connected with smartphone addiction, with use after 1 a.m. increasing a 3- times risk," the authors wrote.Students who reported high use of smartphones also reported poor sleep quality, the study found. That foils in line with previous studies that have found overuse of smartphones at night to be associated with trouble falling asleep, reduced sleep duration (睡眠持续时间)and daytime tiredness. That's likely because use of smartphones close to bedtime has been shown to delay the body's normal sleep - and - wake clock.In fact, the No. 1 rule is "no computers, cell phones, and ipads in bed and at least one hour beforebed Dr. Vsevolod Polotsky, who directs sleep basic research, said in a recent interview. That's because "any LED light source from electronics (电子设备)may further hold back melatonin (褪黑激素)levels," Polotsky said. Melatonin is often referred to as a "sleep hormone," because we sleep better during the night when levels reach the top.“This is a cross-sectional study, and it cannot lead to any firm conclusions about smartphone use as the cause of reduced sleep quality, said Bob Patton, a lecturer in clinical psychology at the University of Surrey, via email.4. How did Sei Yon Sohn's team begin their study?A. By publishing researching papers.B. By responding to others’ concern.C. By collecting firsthand data.D. By turning to related experts.5. What did the study find about sleep quality and smartphone use?A. 30-45% of the university students are addicted to smartphones.B. High use of smartphones is related to poor sleep quality.C. Overuse of smartphones leads to shorter sleep duration.D. Use after 1 a.m. will result in smartphone addiction.6. What is Polotsky's opinion on electronics ?A. We should stop using them an hour before going to sleep.B. LED light source from them will delay normal sleep- and- wake clock.C. Reduced sleep quality has nothingto do with them.D. No electronics should be used in bed at any time.7. What can be a suitable title for the text?A. Say No to SmartphonesB. Sleep Quality Can Be ImprovedC. LED Light Source Causes Great HarmD. Smartphone Addiction Ruins SleepCScientists say baby sharks are at risk of being born smaller and without the energy they need to survive because of warming oceans from climate change.Scientists studied epaulette sharks, which live off Australia and New Guinea. They found that warmer conditions sped up the sharks’ growing process. That meant the sharks were born earlier and very tired. The findings could be used in the study of other sharks, including those that give birth to live young.The scientists studied 27 sharks. Some were raised in average summer water temperatures, about 27 degrees Celsius. Others were raised in higher temperatures around 29 degrees Celsius and 31 degrees Celsius. They found that the sharks raised in the warmest temperatures weighed much less than those raised in average temperatures. They also showed reduced energy levels.Epaulette sharks can grow to a length of about one meter. Their name comes from large spots on their bodies that look like decorations on some military clothing.One study this year found that worldwide numbers of oceanie sharks and rays dropped more than 70 percent between 1970 and 2018. Overfishing is a main concern, while climate change and pollution also threaten shark.Carolyn Wheeler is a doctoral student at the University of Massachusetts Boston and with the ARC Centre of Excellence for Coral Reef Studies at James Cook University in Australia. She was the lead author of the epaulette shark study. She said that while all the sharks survived, those raised in warmer temperatures were not strong enough to survive for long in the wild.She added that if the sharks are born smaller than usual “they are probably going to have to start looking for food sooner—and they’re going to have less time to adjust to their surroundings.” The study should serve as a warning to ocean governing agencies that careful management is needed to prevent the loss of more sharks.8. In what aspect do the warmer conditions affect the baby sharks?A. Their food.B. Their body weight.C. Their living habits.D. Their moving route.9. How did the scientists carry out their study?A. By studying former data.B. By tracking sharks in the wild.C. By collecting information about climate change.D. By comparing sharks in waters of different temperatures10. What does paragraph 5 mainly talk about?A. The origin of sharks’ names.B. The sharks’ appearance.C. The threats to sharks’ survival.D. The sharks’ living environment.11. Which of the following can be the best title for the text?A. Scientists Raise Sharks to Deal with ProblemsB. Global Warming Has Reduced Shark PopulationsC. Baby Sharks Struggle to Survive in Warming OceansD. Scientists Are Struggling to Save Sharks from ExtinctionDAn anti-obesity program for Australian girls didn’t lead to any improvements in their diet, physical activities or body weight a year later, according to a new report.Findings from the school-based intervention (介入), which involved exercise sessions and nutrition workshops for lower-income girls, are the latest disappointment in a lot of research attempting tohead offadult obesity and the disease risks that come with it.Especially during the middle-and high-school years, girls’ physical activity reduces obviously, according tolead researcher David Lubans, from theUniversityofNewcastleinNew South Wales,Australia. He said, “In the future we need to make the programs more interesting and exciting and present information in a way that is meaningful to adolescent girl.”Lubans and his workmates conducted their study in 12 schools in low-income areas ofNew South Wales. At the start of the study, girls in both groups weighed an average of close to 130pounds, with about four in ten considered overweight. Over the next year, adolescents in the intervention group were given pedometers (计步器) to encourage walking and running and invited to nutrition workshops and regular exercise sessions during the schoolday and at lunchtime. Participation in some of those activities were less than ideal. For example, the girls went to only one-quarter of lunchtime exercise sessions, and less than one in ten completed at-home physical activity or nutrition challenges, the researchers reported. At the end of the year, girls in both groups had gained a similar amount of weight and there was no difference in their average body fat.Preventive medicine researcher Robert Klesges said that although some anti-obesity programs have helped adults lose weight, the teen population has always been a source of failure for researchers. “The common belief is: nothing works,” he said. “And we have got to get beyond that.”“We need to think outside the box,” said Klesges, who wasn’t involved in the new study. “That could include learning from what has worked in adult studies, such as giving meal replacement drinks or prepared foods to teens who have trouble making changes to their diet. Or, it could mean using a “step-care” method — rather than researchers or their doctor telling them to keep doing the same thing.” Klesges said.12. The underlined words “head off” in Paragraph 2 can best be replaced by “________”.A. damageB. defendC. preventD. affect13. The methods used in the program to stop obesity don’t include ________.A. walking and runningB. inviting them to nutrition workshopsC. joining exercise sessions regularlyD. giving meal replacement drinks14. The main reason for the failure of the anti-obesity program is probably that ________.A. the participants didn’t take an active part in itB. the program was not interesting and exciting to participantsC. the participants didn’t get extra nutrition or exercise helpD. the program didn’t pay attention to healthy exercise15. What can be inferred from the last paragraph?A. As researchers, it is important to have creative research methods.B. Researchers need to give meals or prepare foods to participants.C. Teen girls have no difficulty in making changes to their diet.D. Some ant-obesity programs have not helped adults lose weight.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。
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广东省梅县东山中学2019-2020学年高考考前提分仿真卷一、选择题：本题共12小题，每小题5分，共60分。
在每小题给出的四个选项中，只有一项是符合题目要求的。
1．若3()3()21f x f x x x +-=++对x ∈R 恒成立，则曲线()y f x =在点()()1,1f 处的切线方程为（ ）A ．5250x y +-=B ．10450x y +-=C ．540x y +=D ．204150x y --=2．若直线2y kx =-与曲线13ln y x =+相切，则k =（ ）A ．3B ．13 C．2 D ．123．重庆奉节县柑桔栽培始于汉代，历史悠久.奉节脐橙果皮中厚、脆而易剥，酸甜适度，汁多爽口，余味清香，荣获农业部优质水果、中国国际农业博览会金奖等荣誉.据统计，奉节脐橙的果实横径（单位：mm ）服从正态分布()280,5N ，则果实横径在[)75,90的概率为( )附：若()2,X N μσ~，则()0.6826P X μσμσ-<<+=；()220.9544P X μσμσ-<<+=.A ．0.6826B ．0.8413C ．0.8185D ．0.95444．将函数()f x 的图像上的所有点向右平移4π个单位长度，得到函数()g x 的图像，若()()sin g x A x ωϕ=+0,0,2πωϕ⎛⎫>>< ⎪⎝⎭A 的部分图像如图所示，则函数()f x 的解析式为 A ．()5sin 12f x x π⎛⎫=+⎪⎝⎭B ．()2cos 23f x x π⎛⎫=-+⎪⎝⎭C ．()cos 23f x x π⎛⎫=+ ⎪⎝⎭ D ．()7sin 212f x x π⎛⎫=+ ⎪⎝⎭5．以下说法错误的是（ ）A ．命题“若2320x x -+=，则1x =”的逆否命题为“若1x ≠，则2320x x -+≠”B ．“2x =”是“2320x x -+=”的充分不必要条件C ．若命题:P 存在0x R ∈，使得20010x x -+<，则p ⌝:对任意x R ∈，都有210x x -+≥D ．若p 且q 为假命题，则,p q 均为假命题 6．已知函数()f x 满足()()1120f f x x x x x⎛⎫+-=≠⎪⎝⎭，则()2f -= A ．72-B ．92C ．72D ．92-7．已知随机变量服从正态分布，若，则为（ ）A ．0.7B ．0.5C ．0.4D ．0.35 8．已知平面区域：，：，则点是的（ ）A ．充分不必要条件B ．必要不充分条件C ．充分必要条件D ．既不充分也不必要条件9．已知：2610a b ==，则3，ab ，+a b 的大小关系是（ ） A ．3ab a b <+< B ．3ab a b <<+C ．3a b ab <+<D ．3ab a b <<+10．若函数2()22x a xx f x -=-是奇函数，则(1)f a -=（ ） A ．﹣1 B ．2-3 C ．23 D ．111．已知数列{}n a 是等差数列，{}n b 是正项等比数列，且11b = ,324355462,,2b b b a a b a a =+=+=+，则20199+=a b （ ）A ．2025B ．2529C ．2026D ．227512．已知数列{}n a 是等比数列，数列{}n b 是等差数列，若261033a a a ⋅⋅=16117b b b π++=，则21039tan1b b a a +-⋅的值是（ ）A ．1B ．22 C ．22-D ．3-二、填空题：本题共4小题，每小题5分，共20分。
13．已知,x y 满足条件20220220x y x y x y +-≤⎧⎪--≤⎨⎪-+≥⎩，若目标函数=+z -ax y 取得最大值的最优解不唯一，则实数a 的值为__________．14．若运行如图所示的程序框图，输出的n 的值为127，则输入的正整数n 的所有可能取值的个数为________．15．设140,0,5,1x y x y x y >>+=++则的最小值为______． 16．数列{}n a 满足：21(1)(21)1n n n na n a n a ++++=+-，11a =，26a =，令•cos2n n n c a π=，数列{}n c 的前n 项和为nS ，则4n S =__________．三、解答题：共70分。
解答应写出文字说明、证明过程或演算步骤。
17．（12分）椭圆()2222:10x y C a b a b +=>>的两个焦点()10F c -，，()20F c ，，设P ，Q 分别是椭圆C 的上、下顶点，且四边形12PF QF 的面积为33π.求椭圆C 的方程；当b c >时，A ，B 为椭圆C 上的动点，且PA PB ⊥，试问：直线AB 是否恒过一定点？若是，求出此定点坐标，若不是，请说明理由.18．（12分）在平面直角坐标系xOy 中，曲线C:2260x y x +-=，直线1l ：30x -=，直线2l ：30x y -=以坐标原点为极点，x 轴正半轴为极轴建立极坐标系.写出曲线C 的参数方程以及直线1l ，2l的极坐标方程；若直线1l 与曲线C 分别交于O 、A 两点，直线2l与曲线C 交于O 、B 两点，求△AOB 的面积.19．（12分）已知函数()()()xf x e x a a R =+∈.讨论()f x 在[)0,+∞上的单调性；函数231()22xg x e x tx tx⎛⎫=--- ⎪⎝⎭在[)0,+∞上单调递增，求实数t 的取值范围. 20．（12分）选修4-5：不等式选讲已知函数()|||2|1f x x a x =++--.若1a ≥，求不等式()2f x ≥的解集；若[1,2]x ∈时，()4f x x +≤恒成立，求a 的取值范围.21．（12分）已知离心率为12的椭圆2222:1(0)x y C a b a b +=>>的右焦点与抛物线2:2(0)E y px p =>的焦点F 重合，且点F 到E 的准线的距离为2.求C 的方程；若直线l 与C 交于,M N 两点，与E 交于,A B两点，且4OA OB ⋅=-u u u r u u u r（O 为坐标原点），求MNF ∆面积的最大值.22．（10分）某工厂共有男女员工500人，现从中抽取100位员工对他们每月完成合格产品的件数统计如下： 每月完成合格产品的件数（单位：百件） [)26,28 [)28,30 [)30,32 [)32,34 []34,36频数 10 45 35 6 4 男员工人数7231811（1）其中每月完成合格产品的件数不少于3200件的员工被评为“生产能手”.由以上统计数据填写下面22⨯列联表，并判断是否有95%的把握认为“生产能手”与性别有关？ 非“生产能手” “生产能手” 合计 男员工 女员工 合计（2）为提高员工劳动的积极性，工厂实行累进计件工资制：规定每月完成合格产品的件数在定额2600件以内的，计件单价为1元；超出(]0,200件的部分，累进计件单价为1.2元；超出(]200,400件的部分，累进计件单价为1.3元；超出400件以上的部分，累进计件单价为1.4元.将这4段中各段的频率视为相应的概率，在该厂男员工中选取1人，女员工中随机选取2人进行工资调查，设实得计件工资（实得计件工资=定额计件工资+超定额计件工资）不少于3100元的人数为，求的分布列和数学期望.附：()()()()()22n ad bc K a b c d a c b d -=++++，.参考答案一、选择题：本题共12小题，每小题5分，共60分。
在每小题给出的四个选项中，只有一项是符合题目要求的。
1、B 2、A 3、C 4、C 5、D 6、C 7、C 8、B 9、D 10、B 11、D 12、D二、填空题：本题共4小题，每小题5分，共20分。
13、2或1-. 14、315、3216、2166n n +三、解答题：共70分。
解答应写出文字说明、证明过程或演算步骤。
17、（1）22143x y +=或2214x y +=；（2）恒过定点0，⎛ ⎝⎭. 【解析】 【分析】（1）根据条件，求出b ，c 的值，从而求出椭圆的方程；（2）设直线AB 方程为y kx m =+，联立直线和椭圆的方程，利用韦达定理及0AP PB ⋅=u u u v u u u v，求出m ，可得直线AB 恒过定点． 【详解】（1）依题意，四边形12PF QF的面积为则142b c ⨯⨯⨯=bc =又四边形12PF QF，记内切圆半径为r ，由2r π=，得2r =，由bc ar ==得2a =， 又2224a b c =+=，且bc =故1b c ⎧=⎪⎨=⎪⎩1b c =⎧⎪⎨=⎪⎩ 所以椭圆C 的方程为22143x y +=或2214x y +=.（2）因为b c >，所以椭圆C 的方程为22143x y +=，则(0P设()11A x y ，，()22B x y ，，由题意知直线AB 斜率存在，设直线AB 方程为y kx m =+，则由22143x y y kx m ⎧+=⎪⎨⎪=+⎩得()()2224384120k x kmx m +++-=， 则122843km x x k -+=+。
212241243m x x m -=+ Δ()()()222264434120*k m k m =-+->，由PA PB ⊥，可得0AP PB ⋅=u u u v u u u v，即()()(1212000x x y y--+-=即)12121230x x y y y y +++=，又11y kx m =+，22y kx m =+所以2222224124124343m k m k k k --+-++222283043k m m k ++-+=+0=解得m =7m =-又7m =-满足()*式 故直线AB方程为y kx =-所以直线AB恒过定点0⎛⎝⎭，. 【点睛】本题考查了求椭圆方程问题，考查直线和椭圆的关系以及转化思想，考查了向量坐标表示垂直，是一道中档题．18、（1）1l ：()6R πθρ=∈，2l ：()3θρπ=∈R .（2【解析】分析：（1）直接根据圆的参数方程求出曲线C 的参数方程，利用极坐标公式求出直线1l ，2l 的极坐标方程.(2)先求出OA,OB,再利用三角形面积公式求AOB ∆的面积.详解：（1）依题意，曲线C ：()2239x y -+=，故曲线C 的参数方程是333x cos y sin αα=+⎧⎨=⎩（α为参数），因为直线1l：0x -=，直线2l0y -=，故1l ，2l 的极坐标方程为1l ：()6R πθρ=∈，2l ：()3R πθρ=∈.（2）易知曲线C 的极坐标方程为6cos ρθ=， 把6πθ=代入6cos ρθ=，得1ρ=6A π⎛⎫⎪⎝⎭. 把3πθ=代入6cos ρθ=，得23ρ=，所以3,3B π⎛⎫⎪⎝⎭. 所以121sin 2AOB S AOB ρρ∆=∠13sin 3364ππ⎛⎫=⨯-= ⎪⎝⎭. 点睛：（1）本题主要考查直角坐标方程、参数方程和极坐标的互化，考查极坐标的应用，意在考查学生对这些知识的掌握水平和计算能力.(2)第2问，化成直角坐标也可以解答，但是利用极坐标解答效率更高. 19、（1）见解析（2）12t ≤- 【解析】 【分析】（1）先对函数()f x 求导，分别讨论1a ≥-和1a <-即可得出结果； （2）由()23122xg x e x tx tx ⎛⎫=--- ⎪⎝⎭在[)0,+∞上单调递增推出()102x g x e x tx t ⎛⎫=---≥ ⎪⎝⎭'在[)0,+∞上恒成立，即min102x e x tx t ⎡⎤⎛⎫---≥ ⎪⎢⎥⎝⎭⎣⎦，构造函数()12x p x e x tx t ⎛⎫=--- ⎪⎝⎭，由导数的方法研究其单调性即可得出结果. 【详解】解：（1）()()()10xf x ex a x =++≥'①10a +≥即1a ≥-时，()f x 在[)0,+∞上单调递增；②10a +<即1a <-时，令()0f x '=，得1x a =--， 在[)0,1a --上()0f x '<，在()1,a --+∞上()0f x '>,()f x 在[)0,1a --上单调递减，在()1,a --+∞上单调递增.综上：当1a ≥-时，()f x 在[)0,+∞上单调递增；当1a <-时，()f x 在[)0,1a --上单调递减，在()1,a --+∞上单调递增. （2）()23122xg x e x tx tx ⎛⎫=--- ⎪⎝⎭在[)0,+∞上单调递增 ()102x g x e x tx t ⎛⎫⇔=---≥ ⎪⎝⎭'在[)0,+∞上恒成立min102x e x tx t ⎡⎤⎛⎫⇔---≥ ⎪⎢⎥⎝⎭⎣⎦令()()10,2x p x e x tx t x ⎛⎫=---≥ ⎪⎝⎭ ()12x p x e x t ⎛⎫+ ⎝'=-⎪⎭，由（1）知，()p x '在[)0,+∞上为增函数，()()min 102p x p t ''==- 当102t -≥，即12t ≤时，()p x 在[)0,+∞上为增函数， ()()min 1002p x p t ==--≥，得12t ≤-，t ∴的取值范围为12t ≤-.当102t -<，即12t >时，()00,x ∃∈+∞使()0p x '= ()p x ∴在()00,x 上为减函数，在()0,x +∞上为增函数，而()1012p t =--<-()0,x ∴∃∈+∞，使得()0p x <成立，舍去，综上，实数t 的取值范围是12t ≤-. 【点睛】本题主要考查导数的应用，通常需要用导数的方法研究函数的单调性和最值等，属于常考题型. 20、（1）解集为R （2）－4≤a ≤1 【解析】 【分析】（1）化简()2f x ≥得|x ＋a |＋|x －2|≥3，利用绝对值不等式的性质可得|x ＋a |＋|x －2|≥|a +2|，结合1a ≥即可得到()2f x ≥恒成立，问题得解。