2019高考(押题)英语一轮选练习题 Unit 2 Robots(含解析)新人教版选修7
选修7 Unit 2 Robots李仕才Ⅰ.阅读理解ACultural trends are greatly influenced by celebrities. When Oprah goes on a 21day vegan diet, it makes headlines. When Amal Clooney wears a Stella McCartney dress, sales go way up. However, one trend that seems harmless — but is actually damaging —is the pressure on famous people to have their photos taken with exotic(奇异的) animals.Famous people asked to have photos taken with wild animals for a magazine spread have good intentions and even love animals. This makes them easy targets for the greedy amusement parks and fake animal centers. Kind people are naturally drawn to places that claim to offer exotic animals safety and are eager to hug baby bears or to swim with dolphins. However, exposé after exposé has shown that m any of these business people are breeders, dealers or exhibitors that are using Hollywood's goodwill for their own ends.At the recently closed Tiger Temple in Thailand, 40 dead tiger cubs were found secretly killed to make tiger wine and other folk medicine. The number of tourist traps using words like “rescue” in their names has increased greatly in recent years.Many business people continually breed the animals, so they'll have a constant supply of young animals to charge people money for photos. Of course, the babies are cute but they grow fast, and within a few weeks they are too big to handle.In some Asian countries, elephants are kept in camps. A few camps are working to help elephants in trouble, but the vast majority are not, and training methods are cruel. As soon as the cameras are gone after someone like Prince William takes a photo with an elephant, the chains go back on.Fans, tell the stars: Stay away from exotic animal photos, and the animals will be grateful.【文章大意】本文主要讲述了明星与动物拍照后对动物造成的危害。
【难句分析】As soon as the cameras are gone after someone like Prince William takes a photo with an elephant, the chains go back on.(倒数第二段最后一句)分析：本句是一个复合句。
As soon as引导时间状语从句。
译文：在某个人如威廉王子和一头大象合过影后，摄像机就撤走了，那头大象就又被锁链拴起来了。
1．What's the main purpose of this passage?A．To show how stars influence cultural trends.B．To introduce some fake animal centers.C．To persuade stars not to take photos with animals.D．To encourage people to breed more animals.答案与解析：C 考查目的意图。
根据文章最后一段“Fans，tell the stars：Stay away from exotic animal photos，and the animals will be grateful”可知，本文的写作目的是呼吁明星们不要和动物拍照，故选C。
A项错在明星对文化趋势的影响，这只是文章的导入和伏笔，并不是主要目的；B项错在介绍一些假的动物中心，这只是文章中提到的众多信息之一，并非本文的意图所在；D项错在鼓励人们喂养更多的动物，不是本文的写作目的，故排除。
2．Business people breed animals to ________.A．attract visitorsB．make profitsC．rescue rare speciesD．maintain their population答案与解析：B'考查细节理解。
根据第四段的第一句“Many business people continually breed the animals，so they'll have a constant supply of young animals to charge people money for photos.”可知，很多商人养动物是为了盈利，故选B。
A项错在吸引旅游者，这是手段，并非最终目的；C项错在拯救珍稀物种，与原文意思不符；D 项错在维持动物数量，文章中并没有提到，故排除。
3．To have a constant supply of young animals, business people ________.A．continued to be breedersB．charged more for photographingC．turned to the local governmentD．brought in more baby animals答案与解析：A'考查细节理解。
根据第四段的第一句“Many business people continually breed the animals，so they'll have a constant supply of young animals to charge people money for photos”可知，那些商人不断地饲养动物，故选A。
4．What will happen to the animals after they've been taken photos?A．They will be well fed.B．They might be helped out.C．They remain badly treated.D．They are to be handled properly.答案与解析：C'考查推理判断。
根据第五段的最后一句“As soon as the cameras are gone after someone like Prince William takes a photo with an elephant，the chains go back on.”和本段的整体内容可推知，动物在和明星拍照后，生活并没有因此得到改善，照相机移走后，它们还是被锁链拴着，继续被虐待，故选C。
A项错在被很好地喂养，B项错在可能被解救出来，D项错在动物会被恰当处理。
BIt’s an annual argument. Do we or do we not go on holiday? My wife says no because we have no savings to save us. I say you only live once and we work hard and what’s the point if you can’t go on holiday. The joy of a recession (不景气) means no argument next year —we just won’t go.Since money is known to be one of the things most likely to bring a relationship to its knees, we should be grateful. For many families the recession means more than not booking a holiday. A YouGov survey of 2,000 people found 22% said they were arguing more with their partners because of concerns about money. A recent research shows arguments about money were especially damaging to couples.Kim Stephenson, an occupational psychologist, believes money may be different things to men and women. ＂People can say the same things about money but have different ideas of what it’s for, ＂ he explains. ＂They’ll say it’s to save, to spend, for security, for freedom, to show someone you love them.＂ He says men are more likely to see money as a way of buying status and of showing their parents that they’ve achieved something.＂The biggest problem is that couples assume each other know what’s going on with their finances, but they don’t. There seems to be more of a taboo (禁忌) about talking about money than about death. But you both need to know what you’re doing, who’s paying what into the joint account and how much you keep separately. In a healthy rel ationship, you don’t have to agree about money, but you have to talk about it.＂1. What does the author say about going on holiday in Paragraph 1?A. It will cost them too much money.B. Few people can afford it without working hard.C. It makes all the hard work worthwhile.D. It is the chief cause of family quarrels.2. According to the text, what does Kim Stephenson believe?A. Money is often a symbol of a person’s status.B. Money means a great deal to both men and women.C. Men and women spend money on different things.D. Men and women view money in different ways.3. The author suggests that couples should________.A. put their money together instead of keeping it separatelyB. discuss money matters to maintain a healthy relationshipC. make efforts to reach agreement on their family budgetsD. avoid arguing about money matters to remain romantic【文章大意】文章通过度假的问题引入话题，男人和女人对钱的看法是不一样的，夫妻应该就钱的问题多进行讨论，这样可以建立健康的关系。
(高中英语2019版)一轮核心考点探究与练习 教材复习篇 Unit 2 Robots(含解析)新人教版选修7(含答案)
Unit 2 Robots李仕才【短文语法填空】In the West we are familiar with ballets like Swan Lake.But there’s another classical dance form with a long history 1. has only recently burst onto the world scene. It is called classical Chinese dance.Classical Chinese dance is 2. incredibly demanding, refined, and expressive dance form. Alongside ballet, it is also one of the most comprehensive dance systems 3. (know) to humankind.4．recently, few people outside China had ever heard of classical Chinese dance. One major reason was that when Chinese companies performed abroad, they often mixed Chinese dance with western dance styles. And so the audience left the theater not sure exactly 5. they had just seen.In 2006, however, the Shen Yun Performing Arts Company 6. (establish) in New York. Its mission was to promote 7. (tradition) culture, and this included 8. (present) classical Chinese dance in its purest form. Not quite a decade later, classical Chinese dance has become much 9. (well) recognised and is starting to influence western ballet.Although they have significant differences, both ballet and classical Chinese dance have the ability to vividly tell 10. (story) and move us through beautiful art.【解题导语】本文是一篇说明文。
人教版2019高考英语一轮复习练习题Unit2Robots含解析选修7
Unit 2 Robots一、阅读理解Captain John Bunch loves to go fishing. In fact, Bunch loves fishing so much that he became a professional fishing guide decades ago and has remained one ever since. There is something, however, that Bunch loves even more. That is his country and the men and women who join the army to protect it. Ever since Bunch met a young soldier in 2005, who wanted to go on a fishing trip before he left the army, the Florida native has offered over 1 200 fishing trips to veterans(退伍军人), with all expenses paid.And Bunch’s efforts to give back to those who have served their nation go even much further. Inspired by that fishing trip 11 years ago, he founded Operation Open Arms, which has since helped nearly 3 400 US troops and given out more than $12 million in direct benefits with his charity. Operation Open Arms also provides free weddings, vacations, and more leisurely activities to veterans, and can rely on a network of over 300 businesses and individual partners to get former soldiers anything they might need upon returning home from army.The former marine’s heartwarming generosity is a result of his own experiences in the military and the pride he has for his country. "I do this because I love my country and I do this because America is the greatest country in the world," he told NBC’s Today Show. Bunch’s unwavering commitment goes so far that he once turned down an invitation from then-President George W. Bush, because he had already scheduled a fishing trip with one of his veterans. Even the military has recognized Bunch’s work of love, and earlier this year honored him and his organization with the Outstanding Civilian Service Award and the Army’s most prestigious civilian award.1.What caused John Bunch to offer free fishing trips to veterans?A.A young soldier’s desire to go on a fishing trip.B. Working as a professional fishing guide.C. Having served in the army.D. Growing up in Florida.2.What is Paragraph Two mainly about?A. The achievements Operation Open Arms has made.B. How Operation Open Arms was founded.C. Activities Captain John Bunch has joined.D. The missions of Operation Open Arms.3.Which can best describe John Bunch’s personality?A. Ambitious and talented.B. Responsible and patient.C. Honest and determined.D. Warm-hearted and generous.4.John Bunch didn’t accept George W. Bush’s invitation because___.A. he thought little of himB. he didn’t want to see himC. he had to take care of businessD. he wanted to stay with veterans【文章大意】钓鱼向导John Bunch不仅自己喜欢钓鱼，而且还为美国退伍军人安排很多次免费的钓鱼之旅，并为他们提供一些其他的福利。
2019高考英语一轮基础梳理与练习 Unit 2 Robots(含解析)新人教版选修7
Unit 2 Robots李仕才【短文语法填空】In the West we are familiar with ballets like Swan Lake.But there’s another classical dance form with a long history 1. has only recently burst onto the world scene. It is called classical Chinese dance.Classical Chinese dance is 2. incredibly demanding, refined, and expressive dance form. Alongside ballet, it is also one of the most comprehensive dance systems 3. (know) to humankind.4． recently, few people outside China had ever heard of classical Chinese dance. One major reason was that when Chinese companies performed abroad, they often mixed Chinese dance with western dance styles. And so the audience left the theater not sure exactly 5. they had just seen.In 2006, however, the Shen Yun Performing Arts Company 6. (establish) in New York. Its mission was to promote 7. (tradition) culture, and this included 8. (present) classical Chinese dance in its purest form. Not quite a decade later, classical Chinese dance has become much 9. (well) recognised and is starting to influence western ballet.Although they have significant differences, both ballet and classical Chinese dance have the ability to vividly tell 10. (story) and move us through beautiful art.【解题导语】本文是一篇说明文。
2019高考英语一轮复习练习题 Unit 2 Robots(含解析)新人教版选修7
Unit 2 Robots李仕才一、阅读理解Captain John Bunch loves to go fishing. In fact, Bunch loves fishing so much that he became a professional fishing guide decades ago and has remained one ever since. There is something, however, that Bunch loves even more. That is his country and the men and women who join the army to protect it. Ever since Bunch met a young soldier in 2005, who wanted to go on a fishing trip before he left the army, the Florida native has offered over 1 200 fishing trips to veterans(退伍军人), with all expenses paid.And Bunch’s efforts to give back to those who have served their nation go even much further. Inspired by that fishing trip 11 years ago, he founded Operation Open Arms, which has since helped nearly 3 400 US troops and given out more than $12 million in direct benefits with his charity. Operation Open Arms also provides free weddings, vacations, and more leisurely activities to veterans, and can rely on a network of over 300 businesses and individual partners to get former soldiers anything they might need upon returning home from army.The former marine’s heartwarming generosity is a result of his own experiences in the military and the pride he has for his country. "I do this because I love my country and I do this because America is the greatest country in the world," he told NBC’s Today Show. Bunch’s unwavering commitment goes so far that he once turned down an invitation from then-President George W. Bush, because he had already scheduled a fishing trip with one of his veterans. Even the military has recognized Bunch’s work of love, and earlier this year honored him and his organization with the Outstanding Civilian Service Award and the Army’s most prestigious civilian award.1.What caused John Bunch to offer free fishing trips to veterans?A.A young soldier’s desire to go on a fishing trip.B. Working as a professional fishing guide.C. Having served in the army.D. Growing up in Florida.2.What is Paragraph Two mainly about?A. The achievements Operation Open Arms has made.B. How Operation Open Arms was founded.C. Activities Captain John Bunch has joined.D. The missions of Operation Open Arms.3.Which can best describe John Bunch’s personality?A. Ambitious and talented.B. Responsible and patient.C. Honest and determined.D. Warm-hearted and generous.4.John Bunch didn’t accept George W. Bush’s invitation because___.A. he thought little of himB. he didn’t want to see himC. he had to take care of businessD. he wanted to stay with veterans【文章大意】钓鱼向导John Bunch不仅自己喜欢钓鱼，而且还为美国退伍军人安排很多次免费的钓鱼之旅，并为他们提供一些其他的福利。
[精品]2019高考英语一轮选练习题Unit2Robots(含解析)新人教版选修7
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选修7Unit 2李仕才考点规范练 (选修7Unit 2)【短文语法填空】阅读下面材料，在空白处填入适当的内容(1个单词) 或括号内单词的正确形式。
A 19-year-old girl posing for a photo on the railroad tracks was hit and killed by a train on Saturday afternoon. The girl, __1__ name has yet to be released, was __2__(report) posing for a selfie on a track in a village, Guangdong province. The section of the railway is famous for its beautiful rose blossoms.Witnesses said that the girl did not realize a train was approaching. There were many visitors __3__(take) photos alongside the tracks, and some people shouted warnings, __4__ no one succeeded in getting the girl’s attention. __5__ employee got off the train to examine the girl and called the police immediately __6__ the accident occurred. __7__(late), she was sent to a nearby hospital by ambulance. According to the nurse on duty that day, the victim showed no sign of life upon her arrival at the hospital.This is not the first time that a visitor __8__(kill) by a train on that section of the tracks, said one of the villagers. More and more visitors, especially young people, are finding their way onto the train lines, especially those near flowerbeds and spring blossoms. They like to photograph __9__(they) in the scenic spots.Local police warned people that the new trend of taking selfies while standing on train tracks puts many people’s lives __10__ risk.【参考答案】1. whose2. reportedly3. taking4. but5. An6. after7. Later8. has been killed9. themselves 10. atⅠ.阅读理解AEach year,hikers and mountain bikers get lost or injured in the wilderness.Search and rescue efforts can involve 20 or more people.But a new “smart” drone(无人机) can follow hiking trails(小路) without a pilot’s assistance.This could allow rescuers to search more eff iciently.Scientists outfitted a craft with a single camera.As the drone’s “eye”,the camera pointed forwards.But having an eye wasn’t enough.The drone also needed a “brain” to understand what it wasseeing.And that brain would have to recognize what constitutes a trail.Camera images,however,can be very difficult for a computer to interpret,study leader Alessandro Giusti notes.So he and his team used photos of forest trails to train their drone’s neural network(神经网络).They attached three GoPro cameras to a single headband.One camera pointed straight forward.The other two were directed 30 degrees to the right and left of the centre.A hiker put the package on and then hit the trails in a forested part of Switzerland.Over several weeks,the cameras recorded a total of 8 hours of video covering 7 kilometres of trails.The researchers then divided the video into individual still images to train the neural network.The network learned to identify what a trail looked like.The team then tested the program with unused images from the video.The computer did a slightly better job than the people had in correctly classifying the images.This meant the drone was ready to navigate the real world on its own.Giusti and his team took their now “smart” device to a forest with trails that had not been used in the drone’s training.It flew along the path,constantly adjusting its direction based on the images coming in through its camera.The drone didn’t perform as well in real-life as it did in the lab,Giusti admits.That’s because the drone’s camera took lower-quality images than the cameras that had been used to train it.As a result,the images being taken by the drone looked different,he explains.This confused its neural network.“It’s an exciting use for neural networks,” says Christ opher Rasmussen,a computer-vision scientist who was not involved with the study.“However,the problems faced in the experiments show that there are still some important issues to be worked out.”1.The “smart” drone has been created in order to help .A.find travelers who get lostB.ensure the safety of travelersC.deliver necessities to travelersD.show travelers the way to a place2.While being tested to classify the images in the lab,the computer .A.did as well as the peopleB.did a lot better than the peopleC.did much worse than the peopleD.did a little better than the people3.Why didn’t the drone perform well in the forest?A.The light in the forest was very poor.B.The trees or bushes covered the trails.C.The drone couldn’t fly very low ther e.D.The pictures taken were of poor quality.4.What is Christopher Rasmussen’s attitude towards the results of the experiments?A.Critical.B.Doubtful.C.Objective.D.Optimistic.B(2016·石家庄调研检测)Shopping centres,stadiums and universities may soon have a new tool to help fight crime.A California company called Knightscope says its robots can predict and prevent crime.Knightscope says the goal is to reduce crime by half in areas the robots guard.William Santana Li is the chief executive officer of Knightscope.He says,“These robot security guards will change the world.Our planet has seven billion people on it.It’s going to quickly get to nine billion people.The security equipment that we have globally is just not going to develop that fast.The compan y’s Autonomous Data Machines can become the eyes and ears of law enforcement (执行).”“You want it to be machines plus humans.Let the machines do the heavy and sometimes dangerous work and let the humans do the strategic decision-making work,so it’s always working all together.”The machines are one and a half meters tall and weigh 136 kilograms.They do not carry weapons but they have day-and-night time video cameras which are able to turn 360 degrees and can also sense chemical and biological weapons.Some people may become concerned about their privacy,especially in connection with the video recordings.Some people may worry that such recordings will appear on the Internet.Eugene Volokh,a law professor at the University of California,says the machines have to be used in the right way and it will be interesting to see how state laws deal with this kind of video.William Santana Li says there is a long waiting list for the robots in the US.Workers in the company are working overtime to meet the demands of the market.At least 25 other countries are also interested in these robotic security guards.5.What can this new tool do for humans?A.Make strategic decisions.B.Keep watching day and night.C.Carry heavy weapons.D.Stop crime autonomously.6.Why are people worried?A.Their privacy may be let out.B.The robots are very expensive.C.Robots will replace humans.D.They will be out of work soon.7.Which of the following can be the best title of the text?A.Robots Are Becoming More PopularB.Robots Contribute a Lot to the WorldC.Robots Are in Great Demand NowD.Security Robots Could Help Cut Crime【巩固】What is the first thing you notice when you walk into a shop? The products displayed at the entrance? Or the soft background music?But have you ever notice the smel l? Unless it is bad, the answer is likely to be no. But while a shop’s scent may not be outstanding compared with sights and sounds, it is certainly there. And it is providing to be an increasing powerful tool in encouraging people to purchase.A brand store has become famous for its distinctive scent which floats through the fairly dark hall and out to the entrance, via scent machines. A smell may be attractive but it may not just be used for freshening air. One sports goods company once reported that whe n it first introduced scent into its stores, customers’ intension to purchase increased by 80 percent.When it comes to the best shopping streets in Pairs, scent is just as important to a brand’s success as the quality of its window displays and goods on sale. That is mainly because shopping is a very different experience to what it used to be.Now the rise of electronic commerce (e-commerce)has opened up famous brands to a wider audience. But while e-shops can use sights and sounds, only bricks-and-mortar shops(实体店)can offer a full experience from the minute customers step through the door to the moment they leave. Another brand store seeks to be much more than a shop, but rather a destination. And scent is just one way to achieve this.Now, a famous store uses complex man-made smell to make sure that the soft scent of baby powder floatsthrough the kid department, and coconut scent in the swimsuit section. A department store has even opened a new lab, inviting customers on a journey into the store’s wind ows to smell books, pots and drawers, in search of their perfect scent.1. According to the passage, what is an increasingly powerful tool in the success of some brand store?A.Friendly assistant.B.Unique scents.C.Soft background musicD.Attractive window display.2. E-shops are mentioned in the passage to _______ .A. show the advantages of brick-and-mortar storesB. urge shop assistants to change their attitudeC. push stores to use sights and soundsD. introduce the rise of e-commerce3. Which statement would the writer agree with?A.Put different shop on the products on display.B.Ask every shop assistant to wear light perfume.C.Place fragrant flowers in the shopD.Expose some coffee bean to air inside a coffee shop.4. The main purpose of the passage is to ______ .A. compare and evaluateB. examine and assessC. inform and explainD. argue and discuss【语篇解读】本文是一篇说明文。
2019高考英语一轮基础达标练题Unit2Robots含解析新人教版选修720181010340
Robots李仕才一、阅读理解。
Aerial(空中的) performer Jennifer Bricker was born without legs, but she never let it stop her.Wrapped in a loop(圈) of red silk hung from the ceiling, Jennifer Bricker climbs and twists to the music. Her head hangs down and her strong arms let go as she balances on her back, high above the ground—a move that is all the more daring because she has no legs.Jennifer was a few months old when she was adopted by Sharon and Gerald Bricker. She had big brown eyes, a bright smile, and huge amounts of energy. When a doctor advised her adoptive parents to carry her around in a kind of bucket(桶), they refused.Jennifer soon learned to walkand runon her hands and bottom, and grew up fearlessly climbing trees and bouncing on the trampoline(蹦床) with her three older brothers. “My parents didn’t treat me differently so I didn’t grasp the concept that I was different. I knew I didn’t have legs but that wasn’t stopping m e from doing the things I wanted to do.”At the age of three she was fitted with artificial legs, but she never really took to them—she moved more freely without them.In 1996 the Olympic Games took place in Atlanta. Jennifer loved to watch the women’s gymnastics team, and especially adored the 14yearold Dominique Moceanu who competed for the U．S. When Moceanu and the women’s team won the gold, Jennifer decided she was going to be a gymnast, too. She took up power tumbling, which involves performing floor exercises down a runway. But Jennifer did not want any allowances to be made for her disability.At the age of 10 she took part in the Junior Olympics and by age 11 she was thetumbling champion for the state of Illinois.Jennifer now travels the world as an inspirational speaker and acts as an aerial performer.【解题导语】本文是一篇人物记叙文。
2019高考英语一轮优编选题 Unit 2 Robots(含解析)新人教版选修7
Unit 2 Robots李仕才一、阅读理解。
A new study has found the amount of antibiotics given to farm animals is expected to increase by two­thirds over the next 15 years. Researchers are linking the growing dependence on the drugs to rising demand for meat, milk and eggs. The researchers warn the drugs could quicken the development ofantibiotics­resistant (耐抗生素的)infections. Such infections are already a major public health concern in the United States.Experts say when people stop living in poverty, the first thing they want to do is eat better,rather than earn more money. For most people, that means their diet should contain more meat. Increasing prosperity in Asia has meant people there are eating nearly four times as much meat, milk and dairy products as they did 50 years ago.To meet that demand, farms have put many animals into smaller spaces. As the animals are crowded together, often the easiest way to deal with some of the problems of crowding is to give them antibiotics. It’s clear that antib iotics help animals stay healthy in a crowded environment and grow faster. But bacteria can develop resistance to the drugs gradually, and the antibiotics-resistant bacteria can spread to people.Doctors find that antibiotics that once worked against the infections no longer do. The bacteria have learned ways to fight the medicine. Doctors say the heavy use of antibiotics in animals is one of several reasons for the growth of antibiotic resistance worldwide. In the United States, at least two million people get drug-resistant infections each year. At least 23,000 die from an infection.Ramanan Laxminarayan heads the Center for Disease Dynamics, Economics and Policy. He says the problem is expected to get worse. He believes the use of antibiotics in animals will soon increase sharply. He says that will not be good for human health. He and other researchers wrote a report on the study, which was published in the Proceedings of the National Academy of Sciences. They used datafrom the United Nations that tell how and where livestock(牲畜) are raised today. They then predicted how such production would change by 2030.Europe has banned the use of antibiotics to increase animal growth. And she adds the United States is hoping to persuade farmers to stop using antibiotics for that purpose.1.What is the passage mainly about?A.How to keep farm animals healthy.B.The abuse of antibiotics in human beings.C.A new way of raising farm animals.D.The disadvantages of using antibiotics.2.From he passage, we can infer that using antibiotics too often in farm animals ______.A.will lead to animals' being less activeB.causes animals to get infected more easilyC.makes antibiotic-resistant bacteria spread to peopleD.has a negative effect on the growth of animals3.What accounts for the increasing amount of antibiotics given to farm animals?A.The increasing need for meat.B.The need for eating diversely.C.The less effective antibiotics.D.The limited farm technology.4.How will the use of antibiotics in animals according to Ramanan Laxminarayan?A.It will soon stop rising.B.It will soon increase sharply.C.It will soon rise steadily.D.It will soon increase slowly.参考答案： 1.D; 2.C; 3.A; 4.B解析： 1.[纵观全文便知,文章主要介绍了人们使用抗生素来饲养家畜带来的缺点。
精选2019年高考英语一轮精选练Unit2Robots含解析新人教版选修7
Unit 2 Robots李仕才一、阅读理解。
Vitamin B could help lessen the effects of the most dangerous type of air pollution, according to a new study published recently. In the first study of its kind, a team of international researchers looked at the damage caused by one of the pollutants that have the most severe impact on health: PM2.5.Particulate matter, or PM, is a type of air pollutant consisting of small particles of different sizes. PM2.5 has a diameter of fewer than 2.5 micrometers, about 30 times smaller than a human hair. These particles are so small that they can go into our respiratory system(呼吸系统), resulting in lung and systemic inflammation(炎症) and stress.The team found that something as simple as a daily vitamin B supplement could potentially reduce the impact of the tiny particles on the human body, although they stressed that the research was in its early stages and the sample size was small.For this study, 10 volunteers were initially exposed to clean air and given a placebo(安慰剂) to check their responses. The group then took another placebo for four weeks before being exposed to heavily polluted air from downtown Toronto, where an estimated 1，000 cars pass every hour. The bad air was delivered to the volunteers through an “oxygentype” face mask. The experiment was then repeated, with each volunteer taking a B vitamin supplement daily made up of 2.5 mg of folic acid, 50 mg of vitamin B6, and 1 mg of vitamin B12. B6 can be found in liver, chicken and nuts, and B12 in fish, meat, eggs, milk and some cereals.The researchers found that four weeks of B vitamin supplements reduced the damage of PM2.5 exposure by 28%－76%. The results highlight how prevention at an individual level could be used to fight the harmful effects of PM2.5.【解题导语】本文是一篇说明文。
2019高考英语一轮优练题Unit2Robots(含解析)新人教版选修7
Unit 2 Robots李仕才(选修7Unit 2)【短文语法填空】根据短文内容，在空白处填入适当的内容(1个单词)或括号内单词的正确形式。
The classic advertisement，which is 1.likely(like) to be just the name of a company，gives information about finding certain products.This kind of advertising is unlikely to be suitable because of the petition(compete) in the market place now.What advertisements need to do is 3.to_attract(attract) the public’s attention.Some advertisements 4.are_made(make) up of pictures or the words of experts to show people how good the products are, 5.while others try to create advertisements people like looking at.So they spend much money 6.applying(apply) modern techniques to the advertisements.Modern advertisements combine the7.highest(high) standards of design with ideas linked to the pr oducts.What’s more，these advertisers look 8.for other ways such as humour as well as unusual ideas to make people forget that someone 9.is_trying(try) to sell them something.There are also some public advertisements 10.which aim to help increase public knowledge and make our society a better place for everyone.Ⅰ.阅读理解AEach year,hikers and mountain bikers get lost or injured in the wilderness.Search and rescue efforts can involve 20 or more people.But a new “smart” drone(无人机) can follow hiking trails(小路) without a pilot’s assistance.This could allow rescuers to search more efficiently.Scientists outfitted a craft with a single camera.As the drone’s “eye”,the camera pointed forwards.But having an eye wasn’t enough.The drone also needed a “brain” to underst and what it was seeing.And that brain would have to recognize what constitutes a trail.Camera images,however,can be very difficult for a computer to interpret,study leader Alessandro Giusti notes.So he and his team used photos of forest trails to train the ir drone’s neural network(神经网络).They attached three GoPro cameras to a single headband.One camera pointed straight forward.The other two were directed 30 degrees to the right and left of the centre.A hiker put the package on and then hit the trails in a forested part of Switzerland.Over several weeks,the cameras recorded a total of 8 hours of video covering 7 kilometres of trails.The researchers then divided the video into individual still images to train the neural network.The network learned to identify what a trail looked like.The team then tested the program with unused images from the video.The computer did a slightly better job than the people had in correctly classifying the images.This meant the drone was ready to navigate the real world on its own.Giusti and his team took their now “smart” device to a forest with trails that had not been used in the drone’s training.It flew along the path,constantly adjusting its direction based on the images coming in through its camera.The drone didn’t perform a s well in real-life as it did in the lab,Giusti admits.That’s because the drone’s camera took lower-quality images than the cameras that had been used to train it.As a result,the images being taken by the drone looked different,he explains.This confused its neural network.“It’s an exciting use for neural networks,” says Christopher Rasmussen,a computer-vision scientist who was not involved with the study.“However,the problems faced in the experiments show that there are still some important issues to be wo rked out.”1.The “smart” drone has been created in order to help .A.find travelers who get lostB.ensure the safety of travelersC.deliver necessities to travelersD.show travelers the way to a place2.While being tested to classify the images in the lab,the computer .A.did as well as the peopleB.did a lot better than the peopleC.did much worse than the people。
2019年高考英语一轮精选练Unit2Robots含解析新人教版选修720180831167
Unit 2 Robots李仕才一、阅读理解。
Vitamin B could help lessen the effects of the most dangerous type of air pollution, according to a new study published recently. In the first study of its kind, a team of international researchers looked at the damage caused by one of the pollutants that have the most severe impact on health: PM2.5.Particulate matter, or PM, is a type of air pollutant consisting of small particles of different sizes. PM2.5 has a diameter of fewer than 2.5 micrometers, about 30 times smaller than a human hair. These particles are so small that they can go into our respiratory system(呼吸系统), resulting in lung and systemic inflammation(炎症) and stress.The team found that something as simple as a daily vitamin B supplement could potentially reduce the impact of the tiny particles on the human body, although they stressed that the research was in its early stages and the sample size was small.For this study, 10 volunteers were initially exposed to clean air and given a placebo(安慰剂) to check their responses. The group then took another placebo for four weeks before being exposed to heavily polluted air from downtown Toronto, where an estimated 1，000 cars pass every hour. The bad air was delivered to the volunteers through an “oxygentype” face mask. The experiment was then repeated, with each volunteer taking a B vitamin supplement daily made up of 2.5 mg of folic acid, 50 mg of vitamin B6, and 1 mg of vitamin B12. B6 can be found in liver, chicken and nuts, and B12 in fish, meat, eggs, milk and some cereals.The researchers found that four weeks of B vitamin supplements reduced the damage of PM2.5 exposure by 28%－76%. The results highlight how prevention at an individual level could be used to fight the harmful effects of PM2.5.【解题导语】本文是一篇说明文。