密云区2019-2020高三一模试题及答案
2019-2020学年密云区北庄中学高三英语一模试卷及答案
2019-2020学年密云区北庄中学高三英语一模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AAmid the coronavirus outbreak, the U. S. Department of Homeland Security recommends having at least a two - week supply of water and food.PotatoesShelf life：2 to 5 weeks if stored in a cool, dry, dark placeYukon Gold, red, and fingerling potatoeswill last from two to three weeks. Larger white potatoes can last for three to five weeks. Sweet potatoes have about the same shelf life. Don't store them next to onions, however. The two might go together well in cooking, but raw, each gives off gases and moisture that might cause the other to spoil faster.Tea※Shelf life：6 to 12 months past "sell - by" dateDried tea leaves, whether loose (in a sealed container) or in teabags (in an unopened box) can easily last a year or more if they' re not subjected to damp or humidity. However, the tea does tend to lose flavor over time.Peanuts● Shelf life：1 to 2 monthsPeanuts in their shell, especially when kept cool and dry, are perfectly happy in the cupboard for as long as two months.Canned fruits and vegetables● Shelf life：1 to 2 years past "sell - by” dateCanning is an extremely efficient means of preserving food. Generally speaking, if canned foods aren't subjected to extreme heat, their contents should stay good for two years or more. Be aware, however, of dented cans or those with swollen tops, which may indicate the presence of bacteria inside.1. Which can go bad faster if stored with onions?A. Potatoes.B. Tea.C. Peanuts.D. Canned fruits and vegetables.2. What is special about tea?A. The flavor of tea can always remain the same.B. Tea leaves are better to be preserved in an open jar.C. Tea leaves should be kept away from the state of being wet.D. The maximum length of time that tea can be stored is 6 months.3. What may shorten the "sell - by” date of canned foods ?A. Shapes of cans.B. Categories of foods.C. Decline of the temperature.D. Exposure to high temperature.BOver the years, NASA has successfully sent several rovers (飞行器) to Mars. While the science laboratories continue to provide important information on the Red Planet, they keep the space exploration rovers staying closeto the original landing place.To get a more comprehensive (详尽的) view of Mars, the US Space Agency plans to make a small test helicopter with the Mars 2020 Rover, which will be sent off in July 2020.The football-sized “marscopter” weighs about four pounds.It can fly at about ten times the speed of helicopters on Earth. The light weight and fast speed are important for the helicopter to be able to fly in the thin Mars atmosphere, which is about just one percent of that of Earth. “To make it fly in that thin Mars atmosphere, we had to make everything ready, and make it as light as possible while being as strong and powerful as it can possibly be. “Mimi Aung, Mars helicopter project manager, said in a meeting.Upon landing on the Red Planet, the Mars 2020 Rover will find a proper location to send of the helicopter. The helicopter will start with a short climb, no higher than 10 feet, and hover (盘旋) for just 30 seconds before landing back on the Mars surface. If all goes well, five more flights of longer distances, for 90 seconds each, will be conducted over the next 30 days. The short journeys will be recorded by a small camera and sent back to the scientists on Earth.If the plan goes on well, the first helicopter to fly in another world, will open up a whole new way to explore Mars. The Mars helicopter's first flight will be a great invention. For those of us whose research is about flight, that would be a wonderful, historic moment.4. To fly in thin Mars atmosphere，we should make the helicopter_______.A. strong and heavyB. heavy and fastC. light and fastD. strong and slow5. How many times will the helicopter fly?A. Three timesB. Four timesC. Five timesD. Six times6. What can we learn from the last paragraph?A. It’s interesting to fly in another world.B. I' s important to fly in another world.C. The plan to fly the helicopter goes on well.D. The helicopters first flight is successful.7. What may be the best title for the passage?A. To send a helicopter to Mars in 2020B. To send a rover to Mars in 2020C. To live in the thin Mars atmosphereD. To send back records to scientistsCA Singaporean company will feed airport food waste to mealworms before turning them into fish feed, aiming to cut the country's use of imported feed and offer a continuous alternative.Blue Aqua Internationalwill partner with Dnata, an air and travel services provider, to change organic waste at Singapore's Changi Airport into insect protein for aquacultural use, according to a statement Tuesday.The project looks to replace traditional fish and soybean meal as the main sources of protein for aquafeed. The insects will eat the food waste and change it into part of the body containing about 60 per cent protein. The dried baby worms will then be made into feed.These mealworms can be a continuous solution to several problems. Using a small land and giving out less carbon, they turn food waste into feed and offer an alternative source of protein. Ynsect SAS, a small French business that keeps mealworms to feed fish and pets, attracted money from investors includingIron Manmovie actor Robert Downey Jr. in a round of fund-raising last year.The deal will give Singapore's farmers access to domestically produced animal feed, which is traditionally bought from abroad. The Southeast Asian nation imports more than 90 percent of its food and has set a goal to produce a third of its food locally by 2030. It also aims to achieve a general recycling rate of 70 per cent by then. Presently, less than 20 per cent of Singapore's food waste is recycled.As part of the partnership, Dubai-based Dnata will add Blue Aqua to its list of suppliers to buy locally farmed seafood for its catering service.8. What is the function of mealworms?A. To cut the use of imported fish feed.B. To eat food waste and make fish feed.C. To domestically produce animal feed.D. To replace traditional fish and soybean meal.9. What does Paragraph 4 mainly talk about?A. The producers of the feed.B. The purpose of the projectC. The advantages of the project.D. The composition of the feed.10. What can we infer about Singapore from Paragraph 5?A. It is a rich country.B. It is short of self-produced food.C. Its recycling rate is very high now.D. Its farmers don't support the deal.11. What is the text mainly about?A. A new way to produce fish feed.B.An introduction to a company.C. A plan to reduce food waste.D. A deal to protect farmers.DAs artificial intelligence(AI) systems become more advanced, we can expect them to be used more often in the world of human medicine and healthcare. AI is designed to imitate(模仿）the human brain in decision making and learning, so with the computing power to learn tasks in days or even hours, it is possible to create medical AIs that rapidly outperform doctors in certain tasks.Data plays a hugely important role in helping AI systems learn about human medicine. AI systems are trained on large data sets gathered from real-life cases. Providing detailed patient information in quantities is a crucial factor for their success.One of the most important areas for influencing global health is in the field of epidemiology(流行病学）。
北京市密云区2019-2020学年第二学期第一次(4月)阶段性测试高三地理试卷
密云区2019-2020学年第二学期高三第一次阶段性测试地理试卷2020.4第I卷选择题（每题3分，共45分）2019年11月15日，自然资源部中国地质调查局公布，在广西那坡县发现了一个世界级的天坑群。
图1的a为其中一个天坑，图b为岩石圈物质循环示意图。
读图1完成1、2题。
1．下述正确的是A．坑壁岩石类型同图b的丁B．坑底植被属于常绿硬叶林C．坑壁陡峭、底部草木丛生D．天坑高差大、水能较丰富2．形成该景观地质作用的先后顺序是A．②一③一④B．③一④一⑤C．④一⑦一③D．⑥一①一③图2表示某日我国四城市日出日落时刻，读图完成3题。
3．据图推断，下述正确的是A．该日，可能在4月初B．北京比武汉正午时的日影短C．哈尔滨河流正值汛期D．该日，广州日出方向为东南图3的a、b分别为2020年2月13日14时和14日2时海平面等压线分布图，读图，完成4、5题。
4．甲天气系统A．气流水平辐合B．势力逐渐增强C．控制地区干热D．正向偏北移动5．该时段内，北京①气温降低②天气转晴③气压升高④风向北转南A．①②B．③④C．①③D．②④2019年8月10日凌晨，“利奇马”以超强台风姿态登陆浙江，中心附近最大风力16级（52米／秒），一举成为1949年以来登陆我国大陆地区第五强、登陆浙江第三强台风。
11日20时再次登陆山东青岛。
图4为“利奇马”移动路径图。
据此完成6、7题。
6．利奇马A．生成于东南太平洋热带洋面B．登陆青岛时适逢处暑节气C．水平气流呈逆时针方向旋转D．移动路径受控于西风漂流7．以下叙述正确的是A．此次台风登陆浙江温岭时伦敦人正在吃早餐B．4日17时至10日1时台风中心气压值越来越低C．4日至7日利奇马直接参与了海陆间水循环过程D．10日01时至13日08时台风中心移动速度越来越快迁徙指数：反应迁入或迁出人口规模。
图5为2020年农历腊月初七至二月初六期间，北京春运迁出人口趋势图。
读图5完成8、9题。
8．以下说法正确的是A．腊月廿九之前迁徙指数波动上升B．去年该时间段的迁徙指数均大于今年C．腊月廿九之后迁徙指数持续下降D．正月初二以后迁出人口规模比去年少9．以下影响因素对应正确的是A．腊月廿九前后迁出规模大——传统文化B．正月迁出规模多小于去年——经济差异C．2月下旬较前期迁出指数高——国家政策D．北京的热门迁出地是廊坊市——资源开发图6为南京市区居住用地基准地价分布图，读图完成10、11题。
2019-2020学年北京市密云水库中学高三英语一模试题及答案解析
2019-2020学年北京市密云水库中学高三英语一模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AThank you. It’s my great honor to be given this award.You cannot imagine that I have always been a late starter. Years ago, when I was 16, I took an important exam — GCE(General Certificate of Education), which turned out to be a failure. My dad was reading my report card and saw that my position in class was 29th, but the number in class was 29. It meant that I had achieved the distinction of being bottom of my class.I wasn’t lazy, and I was really trying. You can picture how I felt. Dad put his hand on my shoulder and said, “You can only do the best you can, but whatever you decide to do, make sure you love it.” He was a really sweet guy and a great man. I knew his attempt to hide his disappointment with some of his encouraging words. I was depressed for a week, but his advice was a wake-up call.Fortunately I love working with my hands, and I was good at two things: woodwork and art, and I really loved to draw and paint. I was quite talented. Dad strongly encouraged me to go to art school, which in those days wasn’t the obvious place that a father would suggest.So I got into Hartlepool College of Art. The college was a revelation (出乎意料), the passionate teachers there, who were extremely interested in the students, not just tolerating them but actually engaging with them. It was a world apart from my schooling until then. It’s extraordinary what an enthusiastic teacher can do, drawing the student out, lighting independence, and encouraging a design of your own future, rather than waiting for something to happen. I’m honored to have become one of these passionate teachers years later.My teachers inspired me, and thanks to my dad, here I am tonight. I think I should mention all the talents I have worked with over time, and to my kids and my wife Giannina, thank you.Thank you for this great award. I shall find a very special place for it.1. How did the author feel after taking GCE?A. Happy.B. Upset.C. Tired.D. Relieved.2. What didHartlepoolCollege of Art impress the author most?A. The teachers were strict with students.B. The students set good examples for each other.C. The teachers inspired students’ passion for learning.D. The students got prepared for their lessons independently.3. The author gave this speech to ________.A. share his career choiceB. explain his teaching methodsC. describe his life experienceD. show his appreciationBAfter finishing his dinner, Lin Xu opened a WeChat mini-program called "Clear Plate" on his phone and took picture of the empty plates. He was then awarded 157 credit points after the image was uploaded and recognized by artificial intelligence.“Users of the app can use their credit to buy gifts, such as books and cellphones to purchase charity meals donated to children in poor rural areas,” Lin said.A nationwide "Clear Your Plate" campaign is gaining steam online. Efforts to stop food waste and promote thrift are also being made by restaurants that have been urged to create an environment in which consumers are reminded not to waste food. They are also encouraged to offer different portion sizes so that customers can have more choices.The “Clear Plate” mini-program has become popular among young Chinese and currently has nearly 1 million users.Liu Jichen, founder of the startup that developed the app, said that the idea popped up at a dinner in 2017, when Liu found that a restaurant would give diners who polished off their food a card and offer small gifts after a certain number of cards had been collected.“Such an idea can be realized online,” Liu said. He formed a team to work on the project.Yet it was quite challenge for the AI system to identify whether the uploaded photos showed empty plates.To make the AI system smarter, Liu and his team, assisted by more than 1,000 others, spent half a year collecting over 100, 000 samples in canteens and restaurants across the country and used the data to train neural network. Dozens of enterprises, institutions and restaurants have contacted the startup to cooperate on the project.Through the visualized mini-program, people can clearly see the good results of saving food, which will effectively reduce waste, he noted. "We hope our efforts can start a new trend among the younger generation,encouraging them to carry out the virtue of cherishing food and developing the habit of thrift, " Liu said4. What is the main function of the APP "Clear Plate?A. Awarding credit points.B. Giving charity meals.C. Showing the empty plates.D. Encouraging saving food.5. How is the "Clear Your Plate" campaign carried out?A. Customers wasting food are punished.B. People join in it on mini-program.C. Restaurants limit customers' choices.D. People are encouraged to buy gifts.6. What was the most difficult when the app was created?A. Getting other people to cooperate with the team.B. Collecting samples in canteens and restaurants.C. Ensuring the app to recognize empty plates.D. Finding people to fund the app.7. What is the purpose of the writing?A. To introduce an app.B. To promote saving food.C. To praise a startup founder.D. To raise fund for poor children.CEver wondered if dogs can learn new words? Yes, say researchers as they have found that talented dogs may have the ability to grasp new words after hearing them only four times.While previous evidence seems to show that most dogs do not learn words, unless eventually very well trained, a few individuals have shown some extraordinary abilities, according to a study published in the journal Scientific Reports.“We wanted to know under which conditions the gifted dogs may learn novel words” said researcher xuekw Claudia Fugazza from theEötvösLorándUniversityinHungary. For the study, the team involved two gifted dogs, Whisky and Vicky Nina. The team exposed the dogs to the new words in two different conditions.In the exclusion-based task, presented with seven known toys and one new toy, the dogs were able to select the new toy when presented with a new name. Researchers say this proves that dogs can choose by exclusion when faced with a new word, they selected the only toy which did not have a known name.However, this was not the way they would learn the name of the toy. In fact, when they were presented with one more equally new name to test their ability to recognize the toy by its name, the dogs got totally confused and failed.The other condition, the social one, where the dogs played with their owners who pronounced the name of thetoy while playing with the dog, proved to be the successful way to learn the name of the toy, even after hearing it only 4 times. “The rapid learning that we observed seems to equal children’s ability to learn many new words at a fast rate around the age of 18 months,” Fugazza says. “But we do not know whether the learning mechanisms(机制) behind this learning are the same for humans and dogs. ”To test whether most dogs would learn words this way, 20 other dogs were tested in the same condition, but none of them showed any evidence of learning the toy names, confirming that the abilityto learn words rapidly in the absence of formal training is very rare and is only present in a few gifted dogs.8. What was the purpose of the study published in Scientific Reports?A. To better train dogs’ ability to learn new words.B. To further confirm previous evidence about dogs.C. To prove extraordinary memory abilities of gifted dogs.D. To explore favorable conditions for gifted dogs’ new-word learning.9. How did the dogs react when exposed to two new names in the first condition?A. Slow to understand.B. Quick to learn.C. At a loss.D. In a panic.10. What was found about dogs’ new-word learning in the social condition?A. Learning through playing applied to most dogs.B. The social condition helped dogs learn new words.CDogs’ new-word learning turned out to be less effective.D. Dogs shared similar learning mechanisms with children.11. Which of the following is the best title for the text?A. Gifted Dogs Can Learn New Words Rapidly.B. Dogs Identify Newly-named Toys by Exclusion.C. Dogs Can Acquire Vocabulary through Tons of Training.D. Gifted Dogs Have Similar Learning Abilities to Humans.DWolves have a certain undeserved reputation: fierce, dangerous, good forhunting down deer and farmers’ livestock. However, wolves have a softer, more social side, one that has been embraced by a heart-warming new initiative.In a bid to save some of Europe’s last wolves, scientists have explored the willingness of these supposedly fierce creatures to help others of their kind. Female wolves, the scientists have discovered, make excellent fosterparents to wolf cubs that are not their own. The study, published in Zoo Biology, suggests that captive-bred wolfcubs(幼兽)could be placed with wild wolf families, boosting the wild population.The gray wolf was once the world’s most widely distributed mammal, but it became extinct as a result of widespread habitat destruction and the deliberate killing of wolves suspectedof preying on livestock. Fear and hatred of the wolf have since become culturally rooted, fuelled by myths, fables and stories.In Scandinavia, the gray wolf is endangered, the remaining population found by just five animals. As a result, European wolves are severely inbred and have little geneticvariability（变异性）, making them vulnerable to threats, such as outbreaks of disease that they can’t adapt to quickly. So Inger Scharis and Mats Amundin of Linkoping University, in Sweden, started Europe’s first gray wolf-fostering program. They worked with wolves keptat seven zoos across Scandinavia. Eight wolf cubs between four and six days old were removed from their natural parents and placed with other wolf packs in other zoos. The foster mothers accepted the new cubs placed in their midst.The welfare of the foster cubs and the wolves’ natural behavior were monitored using a system of surveillance cameras. The foster cubs had a similar growth rate as their step siblings in the recipient litter, as well as their biological siblings in the source litter. The foster cubs had a better overall survival rate, with 73% surviving until 33 weeks, than their biological siblings left behind, of which 63% survived. That rate of survival is similar to that seen in wild wolf cubs. Scientists believe that wolves can recognize their young, but this study suggests they can only do so once cubs are somewhere between three to seven weeks of age.If captive-bred cubs can be placed with wild-living families, which already have cubs of a similar age, not only will they have a good chance of survival, but they could help dramatically increase the diversity of the wild population, say the researchers. Just like the wild wolves they would join, these foster cubs would need protection from hunting. Their arrival could help preserve the future of one of nature’s most iconic and polarizing animals.12. What’s the theme of the passage?A. Giving wolf cubs a new lifeB. Foster wolf parents and foster cubsC. The fate of wild wolvesD. Changing diversity of wild wolves13. Which of the following flow chart best demonstrates the relationship between the wolves?A. B.C. D.14. Which of the following statements is true?A. Female wolves are willing to raise wolf cubs of 3 to 7 weeks old.B. Foster cubs are accepted by foster parents and are well bred.C. Man’s hostile attitude towards wolves roots in myths, fables and stories.D. Foster cubs and their biological siblings have similar growth rate and survival rate.15. What’s the purpose of the research?A. To help wolves survive various threatsB. To improve wolves’ habitat and stop deliberate killingC. To save endangered wolves by increasing their populationD. To raise man’s awareness of protecting wolves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学年北京市密云区第六中学高三英语一模试题及参考答案
2019-2020学年北京市密云区第六中学高三英语一模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AThis online course is designed to provide you with work-ready skills including responding to job advertisements，writing application letters and resumes（简历）and developing inter-view skills．What topics will it cover?● The recruitment（招聘）and selection process● The job application● Planning for the interview● Developing interview skillsWhat will you achieve?By the end of the course，you'll be able to...● Assess the recruitment and selection process from an employer's point of view● Interpret an advertisement，job description and selection criteria correctly● Model a well-written job application● Plan for a job interviewWho is the course for?While this course appeals to trainees and graduates，it also applies to job seekersin the broader community looking to increasing their confidence and success rate when applying for work．Who develops the course?Central Queensland University．It is Australia's leading regional university．Our courses are designed alongside industry andmany include hands-on learning experiences and project-based learning．Our commitment to making real-world knowledge and skills accessible to all has seen us being awarded global recognition．1. What will students learn if they take the online course?A. The way to write a resume．B. The way to put an advertisement．C. The skills of talking with others．D. The skills of improving reading．2. Who is the online course intended for?A. Trainers．B. Interviewers．C. Job seekers．D. College students．3. Which ofthe following best describes the online course?A Cheap． B. Practical． C. Long-standing． D. World-class．BWhen I was 13, I lost my sight. Since then, I had learned to get about with a walking stick, but had to stay at home because my parents thought I would get lost or robbed, even get hit by a car.I, however, believed I could regain my way if I lost it. A neighbor told me that a public library was offering a free course designed for the blind. That's an important opportunity for me to kill two birds with one stone: I could practice my getting — about skills on my way to learning practical technology. My parentssettled forit.But how would I plan my course? I knew that the blind singer Ray Charles, get around without a walking stick by counting steps. But I couldn't seem to do that the way he had. I developed the power of my imagination, catching the layout（布局）of places I visited and taking note of landmarks in my mind. Every time I visited a place, the mental map I'd drawn would turn up and helped me with the direction. But that doesn't mean I didn't lose my way in the process of acquiring this skill. I'd have to swallow（吞下）my pride to ask kind strangersfor help.On those days I lost my way, I'd go to bed feeling down. But my desires to beat blindness and further my education were usually enough to get me out of bed the next day and try again. Today, I'm a published reporter and audio producer.Yes, I've lost my way at times and found it again. And when people ask me,"Aren't you afraid to be out on your own?” the answer to me is clear：I'd rather risk and find happiness than stick to safety and be painful.Now, impressed by my progress, my father told my mother, "Our boy can see!".4. What does the underlined phrases “settled for" in the second paragraph mean?A. Talked about.B. Stuckto.C. Agreed to.D. Cared about.5. How did the author go around on his own after losing his sight?A.He created pictures of places in his mind.B. He drew a map on the paper to help him.C. He was always asking strangers for directions.D.He threw away the walking stick and counted steps.6. Which of the following can best describe the author?A. Determined and adventurous.B. Patient and intelligent.C. Warm-hearted and positive.D. Adventurous and outgoing.7. How did the author's parents feel about his progress?A.Concerned.B. Surprised.C. Confident.D. Proud.CA new study has discovered that meditation (冥想) and oxygen sport together reduce depression. The Rutgers University study found that this mind and body combination, done twice a week for only two months,reduced the symptoms for a group of students by 40 percent.“We are excited by the findings because we saw such a meaningful improvement in both clinically depressed and non-depressed students,” said lead author Dr. Brandon Alderman. “It is the first time that both of these two behavioral ways have been looked at together for dealing with depression.”Researchers believe the two activities have an interactive effect on combatingdepression. Alderman and Dr. Tracey Shors discovered that a combination of mental and physical training (MAP) enabled students with major depressive disorder not to let problems or negative thoughts defeat them.Rutgers researchers say those who participated in the study began with 30 minutes of focused attention meditation followed by 30 minutes of oxygen sport. They were told that if their thoughts drifted to the past or the future they should refocus on their breathing, enabling those with depression to accept moment-to-moment changes in attention.Shors, who studies the productionof new brain cells in the hippocampus—part of the brain involved in memory and learning—says scientists have shown in animal models that oxygen sport exercise keeps a large number of certain cells alive.The idea for the human intervention (干预) came fromher laboratory studies, she says, with the main goal of helping individuals acquire new skills so that they can learn to recover from stressful life events.By learning to focus their attention and exercise, people who are fighting depression can acquire new learning skills that can help them process information and reduce the overwhelming recollection of memories from the past, Shors says.“We know these treatments can be practiced over a lifetime and that they will be effective in improving mental health.” said Alderman. “The good news is that this intervention can be practiced by anyone at any timeand at no cost.”8. What made the research so different?A. Adopting a way of meaningful talk.B. Combining the two behavioral ways to treat depression.C. Treating depression with special medicine.D. Comparing the depressed with the non-depressed.9. The underlined word “combating” in Paragraph 3 can be replaced by ______.A. fightingB. identifyingC. distinguishingD. examining10. What did the participants do in the research?A. They did oxygen sport half an hour before thinking.B. They thought quietly and then took exercise.C. They took exercise longer than they thought.D. They took exercise while thinking quietly.11. What is Shors’ main purpose of her studies?A. To find out certain brain cells of humans.B. To study the production of new brain cells.C. To offer people a new method to treat stress.D. To decide the links between stress and exercise.DTo Rehan Staton, his childhood was a life of privilege — loving parents, a supportive big brother and a pleasant, private school education. Everything changed when his mother left the country and his father lost his job.He had to sleep with a heavy jacket on when it was cold. He was always hungry. He said he couldn't concentrate at school and would sleep during class. He went from straight. As to near the bottom of his class. A teacher told him he needed special education, which made him hate school.Staton spent his high school years as an excellent athlete, raining to become a professional boxer. He had won a lot of martial arts competitions.But a tragedy struck him in his senior year when Staton suffered serious tendonitis (肌腱炎), in both shoulders. He couldn’t lift either arm for months. His dream of becoming a professional player failed. He struggled to apply to colleges but was refused byall of them.Staton’s body slowly recovered from martial arts and he got a job as a rubbish collector. Many co-workers couldn't help but ask him a simple question, “What are you doing here? You’re smart. You are too young to be here. Go to college.” It was the first time someone outside his family had spoken highly of his intelligence. It was the co-workers thatem enedhim to return to school.Several co-workers put Staton in touch with a professor atBowieStateUniversity. The professor was impressed with their conversation and persuaded the admissions board to change its former decision.Going to college forced Staton’s older brother, Reggie, to drop out. They both knew someone had to be working full time along with their dad. It was a decision Reggie made on his own.After receiving a 4.0, Staton succeeded in becoming a student at theUniversityofMaryland. But he still had a long way to go to attend Harvard Law eventually...12. What finally changed Rehan Staton’s happy childhood?A. His brother’s losing the job.B. His serious health problem.C. His father’s sudden death.D. His mother’s leaving the country.13. What does the underlined word “em ened” in the fourth paragraph mean?A. Force.B. Direct.C. Encourage.D. Accompany.14. Why did Staton’s elder brother have to drop out of school?A. He wanted his brother to study further.B. His father asked him to leave school.C. He had lost interest in most lessons.D. He had to go out to find his mother.15. What will the writer mainly talk about next?A. What Rehan Staton planned to do after entering Harvard.B. How Rehan Staton managed to be admitted to Harvard.C. Why Rehan Staton decided to choose to go to Harvard.D. When Rehan Staton would be successful in Harvard Law.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。
密云区2019-2020学年度高三化学一模
密云区2019-2020学年度高三阶段性测试（6月）化学试卷2020.6本试卷共8页，100分。
考试时长90分钟。
考生务必将答案答在答题卡上，在试卷上作答无效。
考试结束后，将本试卷和答题卡一并交回。
可能用到的相对原子质量：H 1 Li 7 C 12 O 16 N 14 Ga 70第一部分本部分共14题，每题3分，共42分。
在每题列出的四个选项中，选出最符合题目要求的一项。
1．下列物质的用途不正确．．．的是A. 生石灰B. 小苏打C.阿司匹林D.苯甲酸钠物质用途抗氧化剂糕点发酵粉解热镇痛药食品防腐剂2．下列化学用语表示不正确．．．的是A．H2O分子的比例模型： B．NaClO的电子式：C．CO2的结构式：O═C═O D3. 无纺布制成的医用口罩在抗击新型冠状病毒过程中发挥了重要作用，无纺布的主要原料是聚丙烯树脂。
下列说法不正确．．．的是A. 无纺布制成的医用口罩能有效预防病毒传染B. 聚丙烯树脂属于合成有机高分子材料C. 合成聚丙烯树脂的单体是丙烯化学第1 页（共10 页）D．丙烯和聚丙烯树脂均属于纯净物4．常温下，下列各组离子在指定溶液中能大量共存的是A．无色透明的溶液中：Fe3+、NH4+、I－、CO32－B．0.1 mol•L－1 KNO3溶液中：Na+、Fe2+、Cl－、SO42－C．使酚酞变红的溶液中：Na+、Mg2+、SO32－、NH4+D．＝1×10﹣12的溶液：K+、Na+、CO32﹣、HCO3﹣5. 将NaCl溶于水配成1 mol/L的溶液，溶解过程如图所示。
下列说法正确的是A. a离子为Cl-, b离子为Na+B. 溶液中含有N A个水合Na+C. 溶液中存在NaCl Na++Cl-D. NaCl溶解过程需要在容量瓶中进行6. 下列解释事实的离子方程式正确的是A．Na2O2 溶于水：Na2O2+2H2O === 2Na++2OH﹣+O2↑B．用石墨电极电解饱和食盐水：2Cl- + 2H2O === 2OH-+ H2↑+ Cl2↑C．用 Na2CO3溶液处理锅炉水垢中的 CaSO4：CaSO4 + CO32-=== CaCO3 + SO42-D．向Ba(OH)2溶液中逐滴加入NaHSO4溶液至Ba2+恰好沉淀完全：Ba2＋＋SO42－=== BaSO4↓7.设阿伏加德罗常数为N A，下列说法正确的是A．1 mol Cl2与足量Fe反应，转移的电子数为3N AB．22.4 L（标准状况）15NH3含有的质子数为11N AC．常温下，1L 0.1mol/L MgCl2溶液中，含有Mg2＋数为0.1N AD．常温常压下，46 g的NO2和N2O4混合气体含有的原子数为3N A8.下列实验中，能达到相应实验目的的是化学第2 页（共10 页）A．H2在Cl2中燃烧B．证明氯化银溶解度大于硫化银C.证明乙炔可使溴水褪色D．验证温度对平衡移动的影响9．右图是部分短周期元素原子半径与原子序数的关系图。
2020年密云高三一模数学答案
的单调减区间是 (，-1- 1) ，单调增区间是 (1 1 , ) ；当 a 0 时， f (x) 的单调增区
a
a
间是 (，-1- 1) ，单调减区间是 (1 1 , ) ．
a
a
（Ⅲ）解：方法一
因为 f (x) ex ax 1, x R ，
所以令 f (x) 0 ，得 ax 1 0 . （1）当 a 0 时，方程无解， 此时函数 f (x) 无零点；
（2）当 a 0 时，解得 x 1 ， a
此时函数 f (x) 有唯一的一个零点.
综上所述，当 a 0 时，函数 f (x) 无零点；当 a 0 时，函数 f (x) 有一个零点.
方法二
（1）当 a 0 时 因为 f (x) ex 0 ，
所以函数 f (x) 无零点；
（2）当 a 0 时
E (ABC) (ABC) (ABC) (ABC)
所以事件 E 的概率
P(E) P(ABC) P(ABC) P(ABC) P(ABC)
=P( A)P(B)P(C) P( A)P(B)P(C) P( A)P(B)P(C) P( A)P(B)P(C) =0.6 0.8 0.35+0.6 0.2 0.65+0.4 0.8 0.65+0.6 0.8 0.65 =0.168+0.078+0.208+0.312 =0.766
密云区 2019-2020 学年第二学期高三第一次阶段性测试
数学试卷参考答案及评分标准
一、选择题：共 10 小题，每小题 4 分，共 40 分．
题号
1
2
3
4
5
6
7
8
9
10
答案
C
2019-2020学年北京市密云水库中学高三生物一模试卷及答案解析
2019-2020学年北京市密云水库中学高三生物一模试卷及答案解析一、选择题：本题共15小题，每小题2分，共30分。
每小题只有一个选项符合题目要求。
1. 下列生物群体中，属于群落的是A.闽江里的全部生物B.黄河里的全部鱼C.武夷山中的全部植物D.太湖中的全部微生物2. 下列哪一组方法，可以依次解决下列问题（）①鉴定一只白羊是否纯种①在一对相对性状中区别显隐性①不断提高小麦抗病品种的纯合度①检验杂种F1的基因型A.测交、杂交、自交、测交B.杂交、杂交、杂交、测交C.杂交、自交、测交、测交D.测交、测交、杂交、自交3. 有关糖类的生理作用的下列概括中，有错误的是（）A. 核糖和脱氧核糖是核酸的组成成分B. 葡萄糖是重要的能源物质C. 糖元是所有生物体储备的能源物质D. 纤维素是植物细胞壁的主要成分4. 下图表示细胞中某些化合物或元素占细胞鲜重的比例，以下按①①①①顺序排列，正确的是（）A. 水、蛋白质、核酸、脂质；N、H、O、CB. 蛋白质、糖类、脂质、水；O、C、N、HC. 水、蛋白质、脂质、核酸；H、O、C、ND. 蛋白质、水、脂质、糖类；C、O、H、N5. 下列关于真核细胞结构和功能的叙述中，错误的是（）A.抑制核糖体的功能会影响胰岛素的合成B.中心体与细胞有丝分裂有关C.高尔基体膜的主要成分是蛋白质和脂质D.有分泌功能的细胞才有高尔基体6. 关于如图的相关叙述中，不正确的是（）A. 若某水平放置的植物幼苗表现出根的向地生长现象，且测得其根的远地侧生长素浓度为f，则根的近地侧生长素浓度范围应为（2f，h）B. 若某水平放置的植物幼苗表现出茎背地性，测得茎的近地侧生长素浓度为2f，则茎的远地侧生长素浓度范围应为（0，f）C. 除草剂灭草的原理是使杂草的生长素浓度处于大于h状态下D. 若某植物顶芽的生长素浓度为g，产生顶端优势现象的侧芽生长素浓度可能大于h7. 下列有关免疫系统组成的叙述，正确的是（）A. 免疫系统包括免疫器官、免疫细胞B. 免疫器官是免疫细胞生成、成熟或集中分布的场所C. 免疫细胞只包括T细胞和B细胞，分别在胸腺和骨髓中成熟D. 免疫活性物质是由免疫细胞产生的发挥作用的物质8. 胰岛素依赖型糖尿病是一种自身免疫病，主要特点是胰岛B细胞数量减少，血中胰岛素低、血糖高等。
2019-2020学年密云区第二中学高三英语一模试题及答案解析
2019-2020学年密云区第二中学高三英语一模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AYou’re becoming an adult; your friends are changing; school is more challenging; and your life has more ups and downs than it used to. These books are just for you.Say Goodbye to Stressby Dr Jeff BrownKindle Edition $11.79Paperback $16.95Many have trouble getting their stress (压力) under control and want help. This new book will encourage stressed-out readers with its stories from people like them about how they resolved or rethought the stress in their lives, learned to let go of anxiety and worry, and improved their lives by dealing with stress.Find Your Inner Strengthby Amy NewmarkKindle Edition $7.99Paperback $12.75This powerful collection of stories will inspire (激励) you and help you find the inner strength to do with the challenges in your own life. We are stronger than we think.... when we have to be. These brave. courageous people are the role models that show us all what is possible.Random Acts of Kindnessby Amy NewmarkKindle Edition $12.99Paperback $17.77Make miracles happen for yourself and others. It’s easy. Just think outside the box and look around. There are so many ways that you can help—and it turns out the biggest beneficiary (受益人) may be you! Scientific studies have shown that “doing good” is not only good for others but also for the person doing it, making that person happier and healthier.Be the Best You Can Beby Amy NewmarkKindle Edition $10. 99Paperback $15.67This collection shows kids positive role models to follow in its stories about making good choices, havingconfidence, and doing the right things. Parents and grandparents will enjoy discussing the stories with children, making it a family event.1.How will you feel after reading Say Goodbye to Stress?A.Anxious.B.Awkward.C.Relaxed.D.Confused.2.What is unique about Find Your Inner Strength?A.It is written by a well-known author.B.It is the cheapest of the four books.C.It has role models for kids to follow.D.It shows one how to do good deeds.3.Which book is suitable for one who has no confidence?A.Say Goodbye to StressB.Find Your Inner StrengthC.Random Acts of KindnessD.Be the Best You Can BeBA North Atlantic right whale calf(幼崽) was discovered dead on the beach of an island off North Carolina. The male newborn was found on North Core Banks, part of the Cape Lookout National Seashore. The reports indicate that the animal died during birth or shortly after, according to the National Oceanic and Atmospheric Administration(NOAA). Scientists took DNA to determine the calf’s mother.This is the beginning of the right whale’s reproduction(繁殖) season, which begins mid-November and runs through mid-April. NOAA called this death a disastrous start to the season. Each new right whale calf brings so much hope for this badly endangered animals, and losses like this have a great impact on their recovery, NOAA said.The right whale is one of the rarest marine mammals(哺乳动物) in the world, according to NOAA. They will soon be extinct unless something is done to save it, researchers warn. This kind of whale has been experiencing an Unusual Death Event over the past three years, according to NOAA. Since 2017, at least 32 dead and 13 seriously wounded whales have been documented by the organization. “This means more than 10 percent of the remaining population,” according to NOAA.NOAA posted a piece of news on Monday, the same day they announced the calf’s death, warning boaters to be watchful as the whales are migrating(迁徙) nearly 1,000 miles along the Atlantic Coast. The organization calls for boaters to be watchful, slow down and to give these endangered whales plenty of room. They also ask all fishermen to remove their unused nets from the ocean to help avoid possibledamage.4. Why did scientists take DNA of the calf?A. To save its mother.B. To confirm its identity.C. To determine the time of its death.D. To uncover the cause of its death.5. How many right whales are left according to the passage?A. About 40.B. About 50.C. About 400.D. About 500.6. What do we know aboutNorth Atlanticright whales?A. Their reproduction season usually last about half a year.B. They are the rarest marine mammals in the world.C. They are experiencing a high death rate of newborns.D. Their habitat runs nearly 1,000 miles along the coast.7. What’s the main purpose of the news posted on Monday?A. To announce the calf’s unusual death.B. To remind boaters to watch the whales.C. To protect the boats against the whales.D. To assist the whales’ seasonal migration.CA world in which extinct creatures could be brought back to life came a step closer yesterday. Australian scientists have managed to extract a gene from a preserved sample of a Tasmanian tiger and make it active. Thebreakthroughhas left them dreaming that one day they will be able to recreate the animal, which died out more than 70 years ago. And if it can be done with the Tasmanian tiger, it may also be possible to resurrect (复活) creatures that have been extinct for far longer.“There used to be a time when extinction meant forever, but no more, ” said Professor Mike Archer. “We are now able to seriously challenge whether those animals that have gone for ever. What has been achieved is a very important step in bringing back those animals that are extinct. And while I think that technically it is still pretty difficult at the moment, we can now see the possibilities. I’m personally convinced that the Tasmanian tiger will be brought back to life in my lifetime.”The breakthrough came after nine years of experiments by scientists at the University of Melbourne, who extracted a gene from one of several tigers preserved in alcohol in a Melbourne museum. They removed the equivalent gene from a mouse embryo implanted the tiger gene and then watched as the mouse continued togrow normally, suggesting the tiger gene had been activated.Team leader Dr. Andrew Pask said it was the first time DNA from an extinct species had been used to “induce (引起) a functional response in another living organism”.However, the animal’s entire gene structure would have to be revived in the same way to even begin the possibility of bringing the Tasmanian tiger back from the dead.Mick Mooney, a wildlife officer ofthe Tasmanian Government, was worried that such developments could encourage people’s indifference to the protection of endangered species.“If people think that we can bring animals back to life after they’ve gone, they will start saying that there is nothing to worry about because we can fix it up later.”8. What does the underlined word “breakthrough” in the l paragraph refer to?A. Scientists have recreated new animals.B. Scientists have resurrected endangered animal.C. It has turned out that some creatures would not go extinct.D. A tiger gene has been extracted successfully and activated.9. Scientists are carrying out the experiments in order to ________.A. bring extinct animals back to lifeB. transplant the genes of tigers into other animalsC. find out what factors lead to the animals’ extinctionD. find a new way to extract animals’ DNA10. Mike Archer thinks that ________.A. scientists now have no technological difficulty reconnecting extinct animalsB. it’ll be a century or so before a Tasmanian tiger walks on the earth againC. humans have come closer in reconnecting extinct animalsD. reconnecting extinct animals is impossible11. We can learn from Mick Mooncy’s words that_________.A. he thought it unnecessary to worry about endangered animalsB. his opinion is in contrast with that of the Tasmanian GovernmentC. he thought people should be encouraged to protect endangered animalsD. he is concerned that bringing extinct animals back to life may have a negative effectDAvi Loeb, a scientist, believes that we are not alone in the universe. The belief fits withLoeb's alien spaceship theory that at least one alien spaceship might be flying over the orbit of Jupiter, which won the international attention last year.Astronomers inHawaiifound the first known interstellar object in late 2017. It was a bit of light moving so fast past the sun that it could only have come from another star. Almost every astronomer on the planet was trying to figure out how the object, called “Oumuamua” got to our far-away part of the Milky way galaxy. “One possibility is that ‘Oumuamua’ is debris from an advanced technological equipment,” Loeb said. “Technology comes from another solar system just showed up at our door. ”“‘Oumuamua’ is not an alien spaceship,” Paul Sutter, another scientist wrote. He suggested Loeb was seeking publicity. Most scientists think “Oumuamua” is some sort of rock. They think it could be an icy wandering comet.Loeb says that “Oumuamua's” behavior means it can't be a block of rock shaped like a long photo. He thinks it's more likely an object that's very long and thin, perhaps like a long pancake or a ship's sail. Loeb says that if someone shows him evidence thatcontradictshis beliefs, he will immediately give in.Loeb believes himself a truth-teller and risk-taker in an age of very safe, too-quiet scientists. “The worst thing that can happen to me is that I would be relieved of my management duties, and that would give me even more time to focus on science,” Loeb says. He said he wouldn't mind giving up all the titles he had and returning to the Israeli farming village where he grew up.12. What does Loeb say about “Oumuamua”?A. It is an icy comet.B. It looks like a long photo.C. It is actually some sort of rock.D. It may come from another alien civilization.13. What does the underlined word “contradicts” in paragraph 4 probably mean?A.Goes against.B. Relies on.C. Turns to.D. Searches for.14. What do you think of Loeb?A. He is foolish.B. He is unsatisfied with his titles.C. He is a firm believer in scientific truth.D. He is uncertain about his career future.15. What's the best title for the text?A. Have Aliens Paid a Visit in Spaceships?B. Do We Really Know about Space Theory?C. Scientists Are Working on High TechnologyD. Astronomers Are Encouraging Space Travel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学年北京市密云水库中学高三英语一模试题及答案
2019-2020学年北京市密云水库中学高三英语一模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AIt's time to put your two-wheeler to good use on these fun bike paths — each varying in distance and difficulty. Just choose one fit for you.• Paulinskill Valley TrailCheck out Paulinskill Valley Trail, filled with forests, wetlands, and small townsalong this 25- mile route. While the trail is mostly flat, you can do a quick ride. You're likely to catch sight of beautiful birds, considering more than 100 species find a home in the land near the path. Check out the trail in the fall - prime time for pretty sights.•AlaHele MakalaeOn theislandofKaui, you'll find a bike path with lots of beachy views that'll leave you feeling accomplished yet calm. The name translates to “The Path that Goes By Coast,” and, as you might guess, the seven-mile path hugs the shoreline. Start early enough and you'll witness an incredible sunrise to make it even more amazing,• TheCheaha RouteThis ride covers up to 126 miles, with steep climbs and extreme downhills along the way. So prepare for a thrilling ride - one that’s not necessarily for the inexperienced or those looking for an easy, casual ride. Along the route, you'll pedal through five towns. The journey is worth it, though, because you get some of the most scenic views in the state.• The Whitefish TrailFamous for its countless route options, whether you’re a new biker looking for smooth tracks or you have more experience and want to play around on rocky, more technical land, this bike path brings in lots of visitors. The 43-mile route offers beautiful green scenery. Around every comer, you’ll see a new jaw-dropping landscape, from glassy lakes to green mountains.1. When is the best time to visit Paulinskill Valley Trail?A. In Autumn.B. All year round.C. On early mornings.D. On sunny days.2. Which route is not fit for someone new to cycling?A. The Whitefish Trail.B. Ala Hele Makalae.C. Paulinskill Valley Trail.D. TheCheaha Route.3. What's the common feature of the four routes?A. They are full of challenges.B. Various route options are offered.C. They have beautiful scenery.D. Different species can be found there.BNina Wygant, 11, sits in front of a long table in a classroom that looks more like a trendy coffee shop than an elementary school classroom. Some of her fifth-grade classmates at Hopewell Memorial Junior High School sit on high-top chairs at counters. Others choose to sit in club chairs or soft bean bags in comfortable. "I like it because it gives us an environment we like or need to settle down and read a book that we would like to concentrate on instead of having desks and being all quiet," said Vivian Garcia, 10. “You can just space out and have your own little area. I find it very amazing that you can pick your own books instead of being told what to read.”That’s the end goal, said teacher Heather Shadish. Reading has always been a passion for this English language arts and science teacher, a passion she instills（灌输）in her pupils. Back then, in her literature class in graduate school at Chatham University, a professor read aloud the first chapter ofBecause of Winn-Dixieby Kate DiCamillo, a Newbery Medalist. "That was the moment I knew I wanted to some day teach reading. There was a spark there. I just felt these are the kind of books I need to share with kids ---the books that are going to make them feel something and make them fall in love with reading instead of reading being achore.”But information in children's workbooks is limited, so they open tablets and connect to Epic - a digital library that's free to educators and librarians, but $7.99 a month for parents — giving kids unlimited access to approximately 35,000 books（both print and audio）, quizzes and videos to enhance learning.“Epic gives students access to information not found in a textbook and presents it in a more interesting way," she said.4. What does Vivian think of the reading experience?A. She favors club chairs and free discussion.B. She feels comfortable to be told what to read.C. She enjoys the environment and reading choice.D. She finds it easy to pick a book in a crowded area.5. What does the underlined word “chore" in paragraph 2 mean?A. Task.B. Process.C. Habit.D. Skill.6. What can children get from Epic?A. Free audio books.B. Tasks on reading levels.C. Advice from educators.D. Useful learning resources.7. Which of the following is the best title of the passage?A. A Teacher's New Reading MethodB. Pupils' love of Reading RoomC. Options of Teaching ReadingD. Easy Access to Digital ReadingCSelf-esteem is an abstract concept, which refers to people’s beliefs about their own worth and value. American psychologist Abraham Maslow thought self-esteem was a basic human need and included self-esteem in his hierarchy of human needs. He described two different forms of “esteem”: the need for respect from others in the form of recognition, success, and admiration, and the need for self-respect in the form of self-love, self-confidence, and skill. Respect from others was believed to be more fragile and easily lost than inner self-esteem. According to Maslow, without the fulfillment of the self-esteem need, individuals will be driven to seek it and unable to grow and obtain self-realization.Basically, high self-esteem is achieved through a series of real accomplishments, which is good for people. However, the excessive high self-esteem, based more on a sense of entitlement than on any accomplishment, is considered to be less psychologically healthy. And just as self-esteem can be too high, it can also be “under-inflated”. Those having poor self-esteem do have a basis for feeling good about themselves but they may not recognize their accomplishments and actions as meaningful.To appreciate what it would be like to have high self-esteem, one can consider how they may feel about things in their lives that they value. For instance, some people really like cars. They take good care of their cars. They may even decorate the car and then show it off to other people with pride. Similarly, people with high self-esteem love, care for and feel proud of themselves. Take children for example. When they have high self-esteem, they believe they are valuable and important. They enjoy different activities and can handle criticism easily without taking it personally.People need to develop positive self-esteem. This can convince them they deserve happiness. Besides, thedevelopment of positive self-esteem increases the capacity to treat other people with respect, thus favoring a variety of interpersonal relationships and avoiding destructive ones.8. What can we infer from Abraham Maslow’s theory about self-esteem?A. Self-esteem ensures us a successful life.B. Self-esteem is essential to self-realization.C. Self-esteem means little to psychological health.D. Others’ respect is more important than self-respect.9. What does the underlined word “under-inflated” in paragraph 2 mean?A. Adequate.B. Insufficient.C. Moderate.D. Lifelong.10. How does the author explain the feelings of having high self-esteem?A. By giving examples.B. By analyzing causes.C. By providing figures.D. By making contrasts.11. Which of the following does the author support?A. Self-esteem ultimately leads to happiness.B. Self-esteem earns you respect from others.C. Positive self-esteem benefits people’s social lives.D. Positive self-esteem helps people out of difficulties.DRichard Campbell is a secondary school student. He is15 years old. He lives in a small town in the north ofEngland. Every morning, he gets up at eight o’clock, puts on his uniform and walks to school.One hour later, the lessons start. The students usually study maths, English, history and geography in the morning. They usually study music and drawing and they play sports after lunch. They have a ten-minute break between classes. They also spend a long time in the school library, reading books and doing their homework.Richard likes his school very much. His favourite subjects are English and geography, but he doesn’t like maths because he is not good at it.Richard and all his friends spend the whole day at school. Lunch is at one o’clock. He doesn’t like the food that the school serves. This is why he often brings a packed lunch from home. He always has his lunch in the dining hall, but some of his friends sometimes eat in the courtyard or outside the school gate.At weekends, he always goes out with his friends because he doesn’t go to school. On Saturday, he always goes to the cinema or to the sports centre. On Sunday, he just goes for a walk with his dog.12. What time do Richard’s lessons begin in the morning?A. At 8:00.B. At 8:30.C. At 9:00.D. At 9:10.13. What does Richard like best?A. Maths and English.B. English and geography.C. History and maths.D. Geography and history.14. Where does Richard have lunch on weekdays?A. In the dining hall.B. At home.C. In the courtyard.D. Outside his school gate.15. What does Richard always do on Saturday?A. He reads and does homework.B. He goes to see films or does sports.C. He walks his dog or does exercise.D. He spends a long time in the library.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。
密云区2019-2020学年第二学期高三数学一模试卷含答案
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2019-2020学年密云区第一中学高三英语模拟试卷及参考答案
2019-2020学年密云区第一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AIf you truly want to live, you need to get out and see the world. Traveling and living different adventures may become your favorite lifestyle. Here is a brief introduction about the top three destinations to visit in the world. ParisFirst on the list is Paris, France. For some people, this shouldn’t be a surprise. For others, they might consider Paris overrated as it has a reputation for being dirty. Any major city in the world might be thought to be dirty by anyone not living in a city. It comes with the territory. The reason Paris is at the top of this list is not because of its famous attractions but because of its charm. You can spend the day walking around cobblestone streets and enjoy elegant cafes and high-end shopping. When you finish satisfying your appetite, you can relax on the banks of the Seine River.Glacier National ParkGlacier National Park comes in second on the list. It is located in Montana, America. It will be well worth the effort thanks to snow-capped mountains, crystal blue lakes, seventy miles of hiking trails, and thirteen camping areas. If you visit during the summer, you can go swimming or white-water rafting. If you visit during the winter, you can go skiing or snowshoeing. But the real allure (诱惑力) and what you will always remember is the breathtaking scenery and fresh mountain air.Bora BoraThe reason Bora Bora is the third on this list is that it’s expensive, which could limit your other travel plans. If you do make it to this small island paradise, you will find peaceful beaches, jungles, luxury accommodations, turquoise water, and some of the friendliest people you have ever met.Other vacation destinations that should be on your list if you’re living the adventurous lifestyle include London, the South Island of New Zealand, Maui, Tahiti, Tokyo, Barcelona and New York City.1. Tourists can ______ to appreciate the charm of Paris.A. enjoy crystal blue lakesB. visit its famous attractionsC. take a walk around cobblestone streetsD. meet the friendliest people you have ever met2. Which of the following points in Glacier National Park will really attract tourists?A. peaceful beaches.B. White-water rafting.C. Snow-capped mountains.D. Fresh mountain air.3. What’s the purpose of this passage?A. to introduce the top three destinations.B. to compare the top three destinations.C. to encourage people to live an adventurous lifestyle.D. to analyze the good and bad points of the three destinationsBHundreds of millions of people watched on television on July 20, 1969, when American astronauts Neil Armstrong and Buzz Aldrin became the first humans to land on the moon. Back then, businesses sold many products connected to the event and many such products are now on sales again — in celebration of the moon landing’s 50th anniversary.A limited number of Omega’s gold Speedmaster watches — the same kind that Buzz Aldrin wore on the moon — will be sold at $34,600. Omega Speedmaster watches have been an important part of space travel since NASA chose them for its moon landing in 1965. Other watches had failed required tests. Omega gave its gold Speedmasters to the astronauts at a dinner in 1969 before the landing. Another less costly type of silver Speedmasters will be sold at $ 9,650. It carries a picture of Aldrin stepping down from the moon lander.Something for children-as well as adults — is the NASA Apollo 11 moon lander set. Made by Lego, it is a group of small pieces to put together to make a model of the moon lander.Other things for sale include the anti-gravity Fisher Space Pens,developed just for the Apollo 11 mission. They work even when writing upside down. Now Fisher Space Pen Company has a limited-edition pen for sale at anout-of this-worldprice: $700, with real material from the Apollo 11 spacecraft.Back in 1969, companies were quick to show their Apollo 11 connections with media and advertisements. The food company Stouffer’s made sure consumers knew it provided food for Apollo 11 astronauts once they returned to Earth. It started the ad campaign “Everybody who’s been to the moon is eating Stouffer’s”. Fifty years later, the company is celebrating with a media campaign to share some recipes from 1969.Marketing experts David Meerman Scott says, “Since 1972,we’ve gone around and around the earth many times, and it is not interesting to people any more. I’m not sure whether they can accept such crazy prices. Now NASA has had plans to go to Mars in the 2030s and marketing efforts for a NASA Mars mission should be in development.”4. What can we learn about the gold Speedmaster watch?A. It will be sold at $34,600.B. NASA bought itats9,650.C. It has Aldrin’s picture inside.D. It was chosen by NASA in 1969.5. What does the underlined word “out-of-this-world” in paragraph 4 mean?A. Extremely fair.B. Surprisingly high.C. Really low.D. Truly worthwhile.6. What does David Meerman Scott mean?A. It is a waste of money to go around and around the moon.B. People will be interested in the products connected to Apollo.C. Since 1972,governments have lost interest in moon explorations.D. The event of going to Mars will be another good chance to advertise.7. What is the author’s main purpose in writing the text?A. To show how to design the best advertisement.B. To forecast the sales of the products in the text.C. To introduce some of the products connected to Apollo 11.D. To celebrate the 50th anniversary of the first moon landing.CWe all know that a healthy lifemeans getting both plenty of exercise and enough good-quality sleep, but reality often gets in the way. The new research indicates that doing enough exercise could make up for some of the unhealthy impacts of bad sleep. While the health benefits of exercise and sleep are nothing new, it's the relationship between them that is interesting in this particular study — it could even give doctors another option to suggest for patients dealing with sleep problems.“We found those who had both the poorest sleep quality and who exercised the least were most at risk of death from heart disease, stroke, and cancer,” says epidemiologist Bo-Huei Huang, from the University of Sydney in Australia.Participants were grouped into three levels of physical activity (high, medium or low) and were also given asleep quality score from 0-5 based on the amount of shut-eye they got, how late they stayed up, insomnia, snoring and daytime sleepiness.Those with the highest risk of dying from cancer or heart disease during the study period were those with the worst quality sleep and who didn't meet the WHO recommended guidelines for exercise. That risk went down for people with poor quality sleep but who did meet the exercise guidelines.In the case of all forms of cancer, for example, those at the unhealthiest end of the sleep and exercise scale had a 45 percent higher risk of dying from cancer than those with good sleep scores who kept physically active. However, that risk just about disappeared for those who didn't score well on sleep but did score well on physical activity.For now it's not clear why more exercise might make up for poor sleep, as far as our health goes. It could be that the increased activity iscounteractinginflammation (炎症), or reducing irregularities in glucose metabolism, suggest the researchers.“Considering that physical activity is perhaps more modifiable than sleep, our study offers people more health incentives to be physically active.” says population health researcher Emmanuel Stamatakis, from the University of Sydney.8. This research is of particular interest in that ________.A. it’s in this study that exercise is known to be beneficial to sleep.B. this study offers people more health treatments to be physical active.C. it could enable doctors to cure patients of their sleeping condition.D. the relationship between exercise and sleep is updated in this study.9. Which of the following statements istrueaccording to the passage?A. Those who had the poorest sleep quality were most at risk of death from heart disease.B. Those scoring lowest on sleep and exercise scale were more likely to die from cancer.C. There’s no risk of cancer for those who didn't sleep well but did score well on physical activity.D. It's evident that in terms of health more exercise could make up for poor sleep.10. What does the underlined word in Paragraph 6 mean?A. interactingB. increasingC. preventingD. causing11. Where can this passage most probably be taken from?A. A research findings reportB. A medical examination reportC. A poor sleep study reportD. A physical activity study reportDJerry Lawson had a love of science and invention from a very young age. And, with the support of his family and teachers, he took that love and helped change the world for billions of people, when he invented the modem video game cartridge.Both of Jerry's parents supported his love of science and invention. His father, a longshoreman, was a science fan and encouraged Jerry to always experiment with things. Jerry's first-grade teacher helped encourage him on his path to be someone influential similar to George Washington Carver, a great AfricanAmerican inventor. His first love in school was chemistry but he ended up liking electronics（电子学）even more.He earned an amateur ham radio license at age 13 and built his own radio station in his room, with an antenna hanging out of his window! Jerry earned money from fixing television sets, visiting people's homes for inhouse repair, and also working at local electronics stores. Jerry also made walkie-talkies and sold them to other kids. He spent many Saturdays at an electronics store that had all of the parts he needed for his inventions. He would use his small allowance and money he earned to buy parts to help fuel his inventions.When he was a young adult, Jerry joined Fairchild Semiconductor as an engineer. During this time, he created his own video arcade game（街机游戏），Demolition Derby, in his garage.A few years later, Jerry was asked to work on a secret project. Not even his boss was allowed to know what he was doing! What it turned out to be was that he was designing the Fairchild Channel F video gameconsole（游戏控制器）and leading the team that invented the video game cartridge. This was the first of its kind and enabled kids around the world to affordably play video games at home.Just like with automobiles，many advances have occurred since the inventionof video games. Video games are now one of the biggest forms of entertainment in the world. But all of this would not have been possible without the vision, passion, and skill of Jerry Lawson and his learn.12. How did Jerry earn money when he was a teenager?A. By running his radio station.B. By selling television sets.C. By repairing things for others.D. By making electronic parts.13. Before Jerry's secret project, playing video games at home was_____.A. expensiveB. harmfulC. commonD. tiring14. What does the author mainly tell us in the last paragraph?A. Jerry Lawson and his team can be more skillful.B. Jerry Lawson is important to the game industry.C.Many advances have taken place in the automobile industry.D. Video games are now the most popular form of entertainment.15. What can be the best title for the text?A. Video Gaming-An Important IndustryB. Game Console-Key to Home Video GamesC. Jerry Lawson-Father of Modern GamingD. Support and Encouragement-Necessary for Success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学年北京市密云区东邵渠中学高三英语一模试题及答案解析
2019-2020学年北京市密云区东邵渠中学高三英语一模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ASilicon Valley VolunteersDo you want to give back to your community while making new friends? Silicon Valley Volunteers is an organization that includes both wishes. The organization is designed to help people find opportunities to volunteer in theirlocal community while meeting others with similar interests. Silicon Valley Volunteers focuses on providing opportunities that fit into the busy schedules (日程安排) of professionals. Many opportunities listed on the site are in the evenings or weekends.Please browse (浏览) the website to learn more about the organization. In addition to volunteer opportunities, there are other opportunities for becoming a leader as well. For any questions about the group, ***************************.Discussion about the groupCourtney H: Hey everyone. I’m new to this group and would love to start meeting up with you guys. I’m a little unclear on how this group works. When you guys go ahead and have an event can someone message me the infomation? Thanks so much.Former member: How about an online discussion for ways we can still volunteer. I just checked in here and thought there would be online activities!Maria O: We need volunteers on Friday, November 8th for The Silicon Valley Philanthropy Day! Volunteers would act as greeters, check-in registrars, and ushers (接待员). The event is from 11 am to 1:30 pm on Nov. 8th @ **********************************************************************************.Firstcome,first serve!1.What is one of the purposes of the organization?A.To help find job opportunities.B.To help make new friends.C.To help develop a new hobby.D.To help experience the joy of sharing.2.Where can you learn more about the organization?A.In the magazine.B.In the newspaper.C.On the Internet.D.On TV.3.What kind of volunteers are needed from Maria O?A.Baby-sitters.B.Translators.C.Teachers.D.Greeters.BMany of us in China enjoy adding chilies (辣椒) toour food, but did you know that this spicy vegetable could also be dangerous? A 34-year-oldUSman recently ended up in hospital after eating a Carolina Reaper—the spiciest chili in the world. After taking just a single bite of one, the man suffered from serious headaches in the following few days, reported BBC News.In fact, reports of stomachache and headache caused by eating spicy food are not something unusual. But if chilies are harmful, why is it that human beings are the only animals to eat this vegetable? According to the website Huanqiu, about 600 million Chinese people—almost half of the national population—are chili eaters. So what makes people love chilies so much? The human body reacts to the burning feeling that comes from eating chilies by releasing natural chemicals that “produce a sense of happiness” , noted BBC News.And the benefits go even further than just personal enjoyment. A survey conducted by the Chinese Academy of Medical Sciences found that the death rate of those who eat spicy food once or twice a week is 10 percent lower than those who eat it less than once a week. The number decreased to 14 percent for those who eat spicy food six to seven times a week. And another study done by theUniversityofVermontcame to a similar conclusion. “The data encourages people to eat more spicy food to improve health and reduce death risk at an early age,” Liu Qi, a nutritionist at the Harvard TH Chan School of Public Health, told BBC News.Chilies have anti-cancer quality and the ability to increase our metabolism (新陈代谢). So, don't worry if you love spicy food. It seems that chilies are actually good for us—except for the Carolina Reaper, perhaps.4. The example of a 34-year-old American is mentioned in Paragraph 1 to prove ________.A. chiliescan be beneficialB. chilies are popular inAmericaC. chilies can be dangerousD. serious headaches can be dangerous5. Eating chilies gives people a sense of happiness by_______.A. decreasing death rateB. releasing natural chemicalsC. curing serious headachesD. providing enough nutrition6. Which of the following statement is TRUE?A. Human are the only animals to eat chilies.B. Stomachache and headaches caused by chilies is something unusual.C. The more chilies you eat, the healthier you are.D. Chilies have anti-cancer quality but it can't increase our metabolism.7. The writer wrote the passage to ________.A. warn people of the dangers of chiliesB. ask people to eat Carolina ReaperC. encourage people to eat more chiliesD. tell people the benefits of chiliesCNostalgia (怀旧) has become increasingly common in our current climate of accelerated, unexpected change. More and more Americans are turning back with longing towhat feels like simpler, sweeter times. They collect cassette tapes, manual typewriters even decades-old video games.Is it a mistake to get too obsessed with the past? Some psychologists warn that too much devotion to the so-called good old days is an escape from reality; it can indicate loneliness or that a person is having a difficult time coping in the present. Psychologist Stephanie Coontz argues that nostalgia distracts us from addressing the problems of modern life and contribute to anxiety, depression , insomnia etc.But new studies suggest that a modest dose of nostalgia is not only harmless, but actually beneficial. They suggest it helps strengthen our sense of identity and makes us feel more optimistic and inspired. It is also a tool for self — discovery and memories are a psychological immune response that is triggered when you want to take a break from negativity. Interestingly, those happy memories can be particularly beneficial both to kids in their teens and to society's elders. Recalling our childhood reminds us of “the times when we were accepted and loved unconditionally," says Krystine Batcho, a psychologist. "That is such a powerfully comforting phenomenon, knowing that there was a time in life when we didn't have to earn our love." Nostalgia can transform even the most ordinary past into legends which warms the heart and the body. Let's not forget that nostalgia has been a source of inspiration to innumerable American writers. Mark Twain recalled his boyhood, writing, "after all these years, I can picture that old time to myself now, just as it was then：The white town drowsing in the sunshine of a summer's morning."So go ahead, daydream a little about your best childhood friend, your first car, a long - gone family pct. As Dr. Sedikidessays，"Nostalgia is ly central to human experience. "But at the same time, keep these words of wisdom from the great inventor Charles Kettering in mind as well："You can't have a better tomorrow if you are thinking about yesterday all the time. "38. What did some psychologists in paragraph 2 probably agree?A. Nostalgia will cause some mental problems.B. Nostalgia makes us devoted to the good old days.C. Nostalgia shows you are trying to get rid of loneliness.D. Nostalgia helps us cope with the difficult time we are going through.9. There are many benefits of nostalgia except ________A. It can enable us to know ourselves better.B. It can bring us some comfort when we recall.C. We are likely to gain attention if we recall the happy childhood.D. We can sometimes break away from negativity with happy memories.10. What will be talked about in the following paragraph?A. The bad influence of too much devotion to nostalgia.B. The reasons why we should avoid nostalgia.C. The bad memories that always stick around you.D. The great changes nostalgia will bring to you.11. What's the best title of the passage?A. We all have a soft spot for nostalgia.B. Nostalgia is actually good for you.C. Don't be carried away by nostalgia.D. There are many times when we like to recall.DJeff Bezos, Elon Musk and Richard Branson have a combined net worth of 400 billion, roughly the size of the GDP of the entire nation of Ireland. And all three men have decided to put vast sums of their wealth into chasing their space travel dreams, creating a modern space race in which ultra — rich men — rather than countries — shoot for the stars.But why the three billionaires choose the crazy plan? Just for the travel dreams? It’s not that simple.As we all know, the space travel is a mirror of comprehensive national strength, whether it’s the cold war or the present. The first space racespannedmultiple presidents and premiers — Kennedy, Krushchev, Brezhnev, Nixon. It made heroes of astronauts and cosmonauts, and it focused national prides. But obviously, this year’s race between the billionaires features none of that national pride or opposing ideas. It’s tax — averse tycoons (大亨) who want to sell high — priced tickets to rich people interested in experiencing weightlessness. Amazon’s Bezoshas said he is funding his portion by selling off large chunks of his Amazon stock (股票) — 1 billion or more a year.What are the odds? If anyone is taking bets on how this will end, and who will have the more profitable space tourism business, consider Amazon’s method of making very little profit in order to eat up competition. So, from this point of view, what’s hiding behind this crazy race is business. As a method of expand influence, it is not a bad idea.Richard Branson has carried out his plan on July 12, and Jeff Bezos announced that he will start his space travel on July 20. Bezos is getting some good press because he’s taking Wally Funk along for the ride. She’s the pilot now in her 80s who was kept out of space in the 1960s because she’s a woman. This may be a bonus for him. As for Musk, he thinks these two above are not real space trips, he wants a larger move.Who will win the race in the end? Let’s wait and see.12. Which of the following people might be the potential client of the space travel?A. Daisy aged 45 with a heavy debt.B. Clarkson who doesn’t enjoy taking risks.C. Billy aged 60 with an ample retirement pension.D. Alexander who knows nothing about space travel.13. What stopped Wally Funk flying to space in the 1960s?A. Age.B. Gender.C. Height.D. Disposition.14. What does the author think of the billionaires race?A. Profit — driven.B. Meaningless.C. Foolish.D. Generous.15. What does the underlined word “spanned” in paragraph 3 probably mean?A. Revolved.B. Turned down.C. Entered.D. Leapt through.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。
北京市密云区2019-2020学年高三下学期第一次(4月)阶段性测试化学试题(解析版)
密云区2019-2020学年第二学期高三第一次阶段性测试化学试卷可能用到的相对原子质量：H-1 C-12 O-16 Fe-56 Cu-64第一部分本部分共14题，每题3分，共42分。
在每题列出的四个选项中，选出最符合题目要求的一项。
1.下列用品在应用过程中涉及物质氧化性的是（）A.铁红用作颜料B.84消毒液杀菌C.纯碱去污D.洁厕灵除水垢用品主要成分Fe2O3NaClO Na2CO3HClA. AB. BC. CD. D【答案】B【解析】【详解】A．Fe2O3为红棕色粉末，铁红用作颜料利用了其物理性质，故A不符合题意；B．NaClO具有强氧化性，84消毒液杀菌利用了其强氧化性，故B符合题意；C．纯碱去油污，利用了Na2CO3水溶液显碱性的性质，故C不符合题意；D．洁厕灵除水垢利用了HCl溶液的酸性，故D不符合题意；故答案选B。
2.化学与生活密切相关，下列有关说法不正确的是（）A. 在海轮外壳镶嵌锌块能减缓轮船的腐蚀B. 燃煤中加入CaO可以减少温室气体的排放C. 加热能杀死新型冠状病毒是因为蛋白质受热变性D. 医用消毒酒精中乙醇的浓度（体积分数）为75%【答案】B【解析】【详解】A．Zn、Fe、海水形成原电池中，Zn比Fe活泼作负极，Fe作正极，发生得电子的还原反应得到保护，该方法为牺牲阳极的阴极保护法，故A正确；B．燃煤中加入CaO可吸收二氧化硫，减少酸雨的发生，不能减少温室气体的排放，故B错误；C．加热可使蛋白质发生变性，则加热能杀死新型冠状病毒是因为蛋白质受热变性，故C正确；D．75%的酒精可用于杀菌消毒，杀毒效果好，对人体危害最小，浓度太大易在细胞壁上形成一层膜阻止酒精渗入，浓度太小杀菌效果差，故D正确；故答案选B。
3.能用离子方程式2H++CO32-=CO2↑+H2O表示的是（）A. NaHSO4和Na2CO3B. H2SO4和BaCO3C. CH3COOH和Na2CO3D. HCl和NaHCO3【答案】A【解析】【分析】离子方程式2H++CO32-=CO2↑+H2O说明强酸与可溶性碳酸盐反应，生成的盐也是可溶性的盐，据此分析解答。
密云区2019—2020学年第二学期第一次阶段性测试 高三语文试卷 2020.4(讲评版)(共59张PPT)
材料二 5G 将给教育带来深刻的变化，它影响着教学方式的变革。现在还 有很多偏远地区网络缓慢，但是 5G 覆盖的话不仅可以让传输更快， 还可能让移动学习也成为未来的发展趋势。 5G 的特性将更有效的支持智慧校园建设。 5G 将在 4G 的基础 上，将网速提高 100倍左右，达到每秒 20Gbps ，网速的提高支撑起 了高集成设备的产生，同时一些如 如 R VR 眼镜等富媒体虚拟产品也 能够得以应用。G 5G 时代，社会生活中每一个地方都会有高速网络存 在，学校不用再单独搭建校园网络，并且通过网络控制系统，可以实现 对校园内用网的管控。 5G 智能终端设备的功耗将会非常低，目前 4G 智能手机一天下来电量就用完了，但以后你随身携带的手机，可能 一个星期、一个月仅需充一次电，如此一来将极大的减少学校用电安全 问题，同时也解决了家校互联问题。在 在 G 5G 时代，校园安全体系 将实现全新升级，通过将不安全、不文明的信息屏蔽在校园之外，减少 社会不良信息对学生的侵害，保护学校数据的安全。
2 ．下列材料能准确解说第四段横线处内容的一项是（3 分） A.给 “ 真 ” 人做手术，把一辆 “ 真 ” 车拆装一遍。 B.用 VR 开飞机，用 VR 模拟地震现场等教学场景。 C.让学生 “ 站在 ” 塞纳河边与法国人畅快地聊天。 D.模拟历史博物馆、深海、太空等不同教学情境。
本题画线句“它可以模拟高难度的、难以实现的场景教学”，注意何为 “高难度”“难以实现”。在四个 选项中，ACD 选项都不属于“高难 度”“难以实现”，只有 B 选项符合句子意思。 故选 B。
5G+AR/VR ，使远程教育更有趣、更生动。教学内容海量共享、教学 素材丰富多样，学生与教师相隔万里也能充分互动，极大的提高了教学 效率和教学质量。在多维度虚拟教育场景构建中，远程教学将 5G 、 全息远程技术、R AR/VR 和课堂教学相融合，让学习者可以沉浸其中， 有更真实的体验，提高了学生的专注度。教室要实现 5G 信号覆盖， 学生佩戴 VR 眼镜，心随景动，仿佛置身于真实场景中。 5G 将以 其高速率、大带宽、低时延的特性给师 生带来更加身临其境的直播 效果，大大缩短了知识与现实的距离。 5G 应用于教育扶贫，解决了 边远山区、贫困地区教育资源配置失衡、教育薄弱等问题，缓解了教育 资源贫乏，促进了教育平等。 5G 远程教育可实现远程直播、在线点 播、异地教学，并能与名师进。 行教学互动，提升了学生的参与度和 主动性，促进跨区域、智能化的教学交流。
密云区2019-2020高三一模试题和答案
密云区2019-2020学年第二学期第一次阶段性测试高三物理本试卷共8页，100分。
考试时长90分钟。
考生务必将答案答在答题卡上，在试卷上作答无效。
考试结束后，将答题卡交回。
第一部分一、本部分共14小题，每题3分，共42分。
在每题列出的四个选项中，选出最符合题目要求的一项。
1．下列说法正确的是A．物体的动能增加，其内能也一定增加B．扩散现象和布朗运动都是分子的无规则热运动C．一定质量的气体膨胀对外做功，气体内能一定增加D．随着分子间的距离增大，分子间的引力、斥力都减小2．如图1所示，一束平行光经玻璃三棱镜折射后分解为a、b两种单色光。
则下列说法正确的是A．在真空中传播时，a光的速度大B．从玻璃射向空气时，b光发生全发射的临界角小C．经过同一双缝干涉实验装置时，观察到a光的相邻亮条纹间距大D．若b光能使某金属发生光电效应，则a光也一定能发生光电效应图13．下列说法正确的是A．放射性元素的半衰期随温度的升高而变短B．太阳辐射的能量主要来自太阳内部的核聚变反应C．阴极射线和β射线都是电子流，都源于核外电子D．天然放射现象中放射出的α、β、γ射线都能在磁场中发生偏转4．中医拔罐疗法在中国有着悠久的历史，早在成书于西汉时期的帛书《五十二病方》中就有类似于后世的火罐疗法。
其方法是以罐为工具，将点燃的纸片放入—个小罐内，当纸片燃烧完时，迅速将火罐开口端紧压在皮肤上，火罐就会紧紧地“吸”在皮肤上，造成局部瘀血，以达到通经活络、行气活血、消肿止痛、1/ 11物理第1页（共11页）2 / 11物理 第 2 页（共 11 页）图2图3祛风散寒等作用的疗法。
在刚开始的很短时间内，火罐 “吸”在皮肤上的主要原因是 A ．火罐内的气体温度不变，体积减小，压强增大 B ．火罐内的气体压强不变，温度降低，体积减小 C ．火罐内的气体体积不变，温度降低，压强减小 D ．火罐内的气体体积不变，温度降低，压强增大5．2019年5月17日，在四川省西昌卫星发射基地成功发射了第45颗北斗导航卫星，该卫星属于地球静止 轨道卫星（同步卫星）。
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5．2019 年 5 月 17 日，在四川省西昌卫星发射基地成功发射了第 45 颗北斗导航卫星，该卫星属于地球静止
轨道卫星（同步卫星）。已知地球的质量为 M 、半径为 R 、地球自转周期为 T、该卫星的质量为 m 、引
力常量为 G ，关于这颗卫星下列说法正确的是
3
A．距地面高度为
치
B．动能为 GMm 2R
物理 第 4 页（共 11 页）
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应画 F - r 图像 B. 研究向心力与线速度的关系时，保持圆柱体质量和运动半径一
定，应画 F - v2 图像 图8
C．研究向心力与质量的关系时，保持圆柱体线速度和运动半径一定，应画 F - m 图像 D．如能保证两个传感器同步记录，圆筒可以不做匀速圆周运动，同样可以完成该实验目
的
14．新型冠状病毒防疫期间，医用一次性口罩是必备的呼吸防护用品，口罩的核心材料是中间一层熔喷无 纺布。为了提高过滤效果必须在熔喷无纺布上进行重要的驻极处理，就是在熔喷无纺布上加入静电荷。 利用电荷的静电力作用捕集尘粒，称为静电吸引沉积，静电吸附效果直接影响着口罩的使用寿命。根 据这些信息，下列说法正确的是 A．医用一次性口罩可以进行高温蒸汽消毒再使用效果会更好’ B．医用一次性口罩可以防护天然放射现象中放射出的α、β和γ射线 C．在防控期间口罩出现严重紧缺，为了节约资源刚用完的医用一次性口罩可以及时清洗晒干后使用 D．防疫期间不法分子为了谋取暴利，制造销售假冒医用一次性驻极口罩，除了从专业技术上鉴定 外，还可以用口罩能否吸附轻小纸屑来判断真假
三、本题包括 4 小题，共 40 分。解答应写出必要的文字说明、方程式和重要的演算步骤。只写出最后答案 的不能得分，有数值计算的题，答案中必须明确写出数值和单位。
17.（8 分）力是改变物体运动状态的原因，力能产生加速度。力在空间上的积累使物体动能发生变化；力
在时间上的积累使物体动量发生变化。如图 11 所示，质量为 m 的物块，在水平合外力 F 的作用下做匀
在磁感应强度为 B 的磁场中，线圈绕 OO′轴以角速度ω匀速转动，外电阻为 R，线圈的 AB 边连在金属滑
环 K 上，CD 边连在金属滑环 L 上，线圈在转动时可以通过滑环和电刷保持与外电路相连。关于发电过
程中的四个状态，下列说法正确的是
A．线圈转到图甲位置时，通过线圈的
磁通量为 NBS
B．线圈转到图乙位置时，通过线圈的
物理 第 5 页（共 11 页）
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为
C（结果保留两位有效数字
（3）下列关于电容器充电时, 电流 i 与时间 t 的关系；所带电荷量 q 与两极板间的电压 U 的关系正 确
的是
。
16.（10 分）某实验小组同学，用铁架台、弹簧和多个质量均为 m=50g 的钩码，探究在弹性限度内弹簧弹力 与弹簧伸长量的关系如图 10（甲）所示。
①弹簧原长为 ②弹簧的劲度系数 옸
cm。 N m（保留两位有效数字）。
物理 第 6 页（共 11 页）
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（2）弹簧与绳有一点相似之处，都可以认为是一个传递力的媒介。某位同学根据这个观点推广认为： 将两个同样的弹簧串接在一起后，弹簧的劲度系数 与原来一样。你认为他的想法正确么？并解 释一下你的理由。
7．如图 3 所示，为探究理想变压器原副线圈的电压和电流关系，将原线圈接到电压有效值不变的正弦交流
电源上，副线圈连接相同的灯泡 L1、L2，电路中分别接入理想交流电压表 V1、V2 和理想交流电流表 A1、
A2，不计导线电阻。闭合开关 S 后，下列说法正确的是
A．A1 示数不变，V1 示数不变，L1 变亮
3．下列说法正确的是 A．放射性元素的半衰期随温度的升高而变短 B．太阳辐射的能量主要来自太阳内部的核聚变反应 C．阴极射线和β射线都是电子流，都源于核外电子 D．天然放射现象中放射出的α、β、γ射线都能在磁场中发生偏转
4．中医拔罐疗法在中国有着悠久的历史，早在成书于西汉时期的帛书《五十二病方》中就有类似于后世
其速度方向与磁场方向垂直。关于α粒子与衰变后的新核在磁场中做的圆周运动，下列说法正确的是
A．运动半径之比是 45:1
B．运动周期之比是 1:117
C．动能总是大小相等
D．动量总是大小相等，方向相反
物理 第 3 页（共 11 页）
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11．如图 6 所示，一个劲度系数为 k 的轻质弹簧竖直放置，弹簧上端固定一质量为 2m 的物块 A，弹簧下端
B．A 2 示数变大，V2 示数变大，L1 变暗
C．A 1 示数变大，变压器输出功率变大，A 1 与 A 2 示数的比值不变
D．V2 示数变大，变压器输出功率变大，V1 与 V2 示数的比值不变
图3
物理 第 2 页（共 11 页）
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8．如图 4 所示为交流发电机发电的示意图，矩形线圈 ABCD 面积为 S、匝数为 N、整个线圈的电阻为 r。
C．加速度为
옸
치
D．入轨后该卫星应该位于西昌的正上方
6．甲、乙两列完全相同的横波分别从波源 A、B 两点 沿 x 轴相向传播，t = 0 时的波形图像如图 2 所示， 若两列波的波速都是 1 m／s，下列说法正确的是 A．甲乙两列波的频率都是 4Hz B．t = 1s 时，甲乙两波相遇 C．t = 3s 时，x = 6 m 处质点的位移为负方向最大 图2 D．t = 0s 时，x = 2 m 处质点与 x = 10m 处质点的振动方向相反
C．物块 A 和物块 B 组成的系统机械能守恒
D．物块 A、物块 B 和弹簧组成的系统机械能守恒
图6
12．图像法具有自己独特的优势，它能把复杂的物理过程直观形象清楚地展现出来，同时也能够形象地描
述两个物理量之间的关系，如图 7 所示，若 x 轴表示一个物理量，y 轴表示一个物理量，其中在实验数
据处理时，会发现图像与两个坐标轴的交点（称为截距）具有特殊的物理意
物理 第 1 页（共 11 页）
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的火罐疗法。其方法是以罐为工具，将点燃的纸片放入—个小罐内，当纸片燃烧完时，迅速将火罐开 口端紧压在皮肤上，火罐就会紧紧地“吸”在皮肤上，造成局部瘀血，以达到通经活络、行气活血、消 肿止痛、祛风散寒等作用的疗法。在刚开始的很短时间内，火罐 “吸”在皮肤上的主要原因是 A．火罐内的气体温度不变，体积减小，压强增大 B．火罐内的气体压强不变，温度降低，体积减小 C．火罐内的气体体积不变，温度降低，压强减小 D．火罐内的气体体积不变，温度降低，压强增大
义。对该交点的物理意义，下列说法不．正．确．的是 A．在测电源电动势和电源内阻时，若 x 轴表示流过电源的电流，y 轴表示
闭
合电路电源两端的电压，则该图像与 x 轴的恒实验时，若 x 轴表示重锤下落到某点时速度的平方，y 轴表示重
锤落到该点的距离，则该图像与 x 轴交点的物理意义是重锤下落时的初速度
变速直线运动，速度由 v0 变化到 v 时，经历的时间为 t，发生的
位移为 x。
v0
v
（1）请根据牛顿第二定律和相关规律，推导动能定理；
图 11
（2）请根据牛顿第二定律和相关规律，推导动量定理。
18.（9 分）如图 12 所示，R 为变阻箱，电压表为理想电压表，电源电动势 E = 6V，当变阻箱阻值为 R=4Ω时，闭合电键后，电压表读数 U = 4V，求：
图4 磁通量的变化率为 NBSω
C．线圈转到图丙位置时，外电路中交流电流表的示数为
ʨᓆ 치
D．线圈转到图丁位置时，AB 边感应电流方向为 A→B
9．如图 5 所示，在等量异种点电荷形成的电场中有 A、B、C 三点，A 点为两点电荷连线的中点，B 点为
连线上距 A 点距离为 d 的一点，C 点为连线中垂线上距 A 点距离也为 d 的一点。则下列说法正确的是
C．在用单摆测重力加速度的实验中，若 x 轴表示摆线长度，y 轴表示单摆周期的平方，则该图像与 x
轴交点绝对值的物理意义是该单摆摆球的半径
D．在研究光电效应的实验中，若 x 轴表示入射光的频率，y 轴表示光电子的最大初动能，则该图像与
x 轴的交点物理意义是该金属的极限频率
13．如图 8 所示，是一个研究向心力与哪些因素有关的 DIS 实验装置示意图，其中质量为 m 的圆柱体放置 在未画出的光滑圆盘边缘，绳子一端连接小圆柱体，另一端连接力传感器，使圆柱体做匀速圆周运动。 圆周运动的轨道半径为 r，光电传感器测定的是圆柱体的线速度。关于这个实验下列说法不．正．确．的是 A. 研究向心力与半径的关系时，保持圆柱体线速度和质量一定，
A．物体的动能增加，其内能也一定增加 B．扩散现象和布朗运动都是分子的无规则热运动 C．一定质量的气体膨胀对外做功，气体内能一定增加 D．随着分子间的距离增大，分子间的引力、斥力都减小
2．如图 1 所示，一束平行光经玻璃三棱镜折射后分解为 a、b 两种单色光。则下列说法正确的是 A．在真空中传播时，a 光的速度大 B．从玻璃射向空气时，b 光发生全发射的临界角小 C．经过同一双缝干涉实验装置时，观察到 a 光的相邻亮条纹间距大 D．若 b 光能使某金属发生光电效应，则 a 光也一定能发生光电效应 图1
固定在水平地面上。一质量为 m 的物块 B，从距离弹簧最上端高为 h 的正上方处由
静止开始下落，与物块 A 接触后粘在一起向下压缩弹簧。从物块 B 刚与 A 接触到弹
簧压缩到最短的整个过程中（弹簧保持竖直，且在弹性限度内形变），下列说法正确
的是
A．物块 B 的动能先减少后增加又减小
B．物块 A 和物块 B 组成的系统动量守恒
（1）电路中的电流 I 和电源内阻 r； （2）电源的输出功率 P 和效率η； （3）试推导说明当 R 为多大时，电源的输出功率最大。