练习册

  • 练习册
  • 试题
    精英家教网 > 高中英语 > 题目详情
    An alcohol breath test (ABT) is often used by the police to find out whether a person is drunk while driving.In the United States，the legal blood alcohol limit is 0.08% for people aged 21 years or older，while people under 21 are not allowed to drive a car with any level of alcohol in their body.A “positive” test result，a result over the legal limit，allows the police to arrest the driver.However，many people who tested positive on the test have claimed that they only drank a “non­alcoholic” energy drink.Can one of these energy drinks really cause someone to test positive on an ABT？Researchers in Missouri set up an experiment to find out.
    First，the amount of alcohol in 27 different popular energy drinks was measured.All but one had an alcohol level greater than 0.005%.In nine of the 27 drinks，the alcohol level was at least 0.096%.The scientists then investigated the possibility that these small levels of alcohol could be discovered by an ABT.They asked test subjects to drink a full can or bottle of an energy drink and then gave each subject an ABT one minute and 15 minutes after the drink was finished.
    For 11 of the 27 energy drinks，the ABT did find the presence of alcohol if the test was given within one minute after the drink was taken.However，alcohol could not be discovered for any of the drinks if the test was given 15 minutes after the drink was consumed.This shows that when the test is taken plays an important role in the test result.The sooner the test is conducted after the consumption of these drinks，the more likely a positive alcohol reading will be obtained.
    小题1:What is the legal alcohol level for a 20­year­old driver in the US?
    A．0.000%.　B．0.005%.
    C．0.080%.　D．0.096%.
    小题2:What is the purpose of the Missouri experiment?
    A．To introduce a new method of calculating blood alcohol levels.
    B．To discover the relation between energy drinks and ABT test results.
    C．To warn people of the dangers of drinking energy drinks.
    D．To change the current legal alcohol limit for drivers in the United States.
    小题3:The underlined word “subjects” in Paragraph 2 refers to________.
    A．the things that are being discussed
    B．areas of knowledge studied in school
    C．the participants in an experiment
    D．the people who belong to a country
    小题4:Which of the following affects the ABT test result most for energy drink consumers?
    A．The age of the person who takes the test.
    B．The place where the test is given.
    C．The equipment that the test uses.
    D．The time when the test is taken.
    小题5:Which of the following is true according to the passage?
    A．A driver whose blood alcohol level is found to be 0.1% will be arrested.
    B．No energy drinks really cause anyone to test positive on an ABT.
    C．Few popular energy drinks contain alcohol in them.
    D．Those taking an ABT 15 minutes after drinking alcohol cannot be found out.

    小题1:C
    小题2:A
    小题3:C
    小题4:C
    小题5:D

    语篇解读　本文是一篇科研报告。主要研究了能量饮料和测试血液中酒精浓度之间的关系。
    小题1:解析：　细节理解题。根据文章第一段第二句“In the United States，the legal blood alcohol limit is 0.08% for people aged 21 years or older，while people under 21 are not allowed to drive a car with any level of alcohol in their body.”可知，答案A符合文意。
    答案：　A
    小题2:解析：　细节理解题。根据文章第一段倒数第二句：“Can one of these energy drinks really cause someone to test positive on an ABT？Researchers in Missouri set up an experiment to find out.”可知，答案B符合文意。
    答案：　B
    小题3:解析：　词义猜测题。根据语境可知，文章中画线句子的意思是：他们要求参加测试的实验者喝下一满听或一瓶能量饮料，然后在一分钟和十五分钟后对其ABT进行测试。由此可推知，此处的subject是指参与实验的人。
    答案：　C
    小题4:解析：　细节理解题。根据文章最后一段中的“the test was given within one minute...15 minutes...This shows that when the test is taken plays an important role in the test result.The sooner the test is conducted after the consumption of these drinks，the more likely a positive alcohol reading will be obtained.”可知，在饮用功能性饮料多久之后进行测试会影响测试效果。
    答案：　D
    小题5:解析：　推理判断题。根据文章第一段可知，合法的血液酒精浓度最高值应该是0.08%，如果超过这个浓度，司机就会被警察逮捕。由此可推知，答案A符合文意。
    答案：　A
    练习册系列答案
    年级 高中课程 年级 初中课程
    高一 高一免费课程推荐！ 初一 初一免费课程推荐！
    高二 高二免费课程推荐！ 初二 初二免费课程推荐！
    高三 高三免费课程推荐！ 初三 初三免费课程推荐！
    相关习题

    科目：高中英语 来源：不详 题型：阅读理解

    After ten years, the world' s largest music festival, Rock in Rio, returned to its hometown Rio de Janeiro for seven days of concerts from Friday, September 23rd, attracting 700,000 people over the whole week．
    It is the 10th edition of the Rock in Rio festival, but only the 4th to be held in Rio as the organizers exported the festival to Lisbon and Madrid ten years ago．The first edition of the festival was in 1985 and the most recent edition in Rio was held in January, 2001．A total of 700,000 tickets were sold out for this year' s festival．
    The festival consists of four stages with the participation of International stars including Elton John, Katy Perry, and bands Metallica, Evanescence and System of a Down．Several stars which performed in previous editions are also on the list this year．．In addition, a number of local singers and bands will also join this year．
    The performance site, named as Rock City, is a 150,000-square-meter area．Besides the concert area, the site also has a giant Ferns wheel, a roller coaster, and a small shopping mall．After the festival, the Rock City area will be converted into a leisure area to athletes in the 2016 Olympic and Paralympic Games in Rio de Janeiro
    According to Rio' s tourism company Riotur, out of the 700,000 people expected in the festival, some 315,000 will be tourists, who raised the hotels' occupation rate to 98 percent．Riotur estimated that the Rock in Rio festival will bring 419 million U．S．dollars for the city and create 10,000 jobs．
    The creator of the festival, Brazilian businessmen Roberto Medina, insisted on opening the Rock City gates himself, in the early afternoon, and greeted the first fans to enter the site．"We come to the gate because the Brazilian audience is even more important than the bands．We applaud them．They make the greatest show," he said．
    小题1:The first edition of the festival may be held in ____．
    A．Rio de JaneiroB．Lisbon
    C．MadridD．a place not mentioned
    小题2:Up to now, the festival has been held in Rio for at least _____．
    A．ten timesB．four times
    C．three timesD．twice
    小题3:The number of native people to attend the festival is probably ____．
    A．700,000B．315,000
    C．10,000D．385,000
    小题4:From the passage, we can know ____．
    A．Rock City is a great theatre
    B．Only rock bands are invited to the festival?
    C．the festival will improve the employment of Rio
    D．The gate of Rock City was opened by the Brazilian audience

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    Recordings of angry bees are enough to send big, tough African elephants running away, a new study says. Beehives (蜂窝)-either recorded or real-may even prevent elephants from damaging farmer's crops.
    In 2002, scientist Lucy King and her team found that elephants avoid certain trees with bees living in them. Today,  Lucy wants to see if African honeybees might discourage elephants from eating crops. But before she asked farmer to go to the trouble of setting up beehives on their farms, she needed to find out if the bees would scare elephants away.
    Lucy found a wild beehive inside a tree in northern Kenya and set up a recorder. Then she threw a stone into the beehive, which burst into life. Lucy and her assistant hid in their car until the angry bees had calmed down. Next，Lucy searched out elephant families in Samburu National Reserve in northern Kenya and put a speaker in a close to each family.
    From a distance, Lucy switched on the pre-recorded sound of angry bees while at the same time recording the elephants with a video camera. Half the elephant groups left the area within ten seconds. Out of a total of 17 groups, only one group ignored the sound of the angry bees. Lucy reported that all the young elephants immediately ran to their mothers to hide under them. When Lucy Played the sound of a waterfall (瀑布) instead of the angry bees to many of the same elephant families, the animals were undisturbed. Even after four minutes, most of the groups stayed in one place.
    Lucy is now studying whether the elephants will continue to avoid the sound of angry bees after hearing it several times. She hasn't tested enough groups yet to know, but her initial (最初的) results were promising enough to begin trials with farmers. She has now begun placing speakers in the fields to see if elephants are frightened away.
    小题1:We know from the passage that elephants may be frightened of         .
    A．loud noisesB．some crops
    C．video camerasD．angry bees
    小题2:As mentioned in the passage, Lucy
    A．works by herself in Africa
    B．needs to test more elephant groups
    C．has stopped elephants eating crops
    D．has got farmers to set up beehives on their farms
    小题3:Why did Lucy throw a stone into a wild beehive?
    A．To record the sound of bees.
    B．To make a video of elephants.
    C．To see if elephants would run away.
    D．To find out more about the behavior of bees.
    小题4:Which of the following is true according to the passage?
    A．Young elephants ignore African honeybees.
    B．Waterfalls can make elephants stay in one place.
    C．Elephants do not go near trees with bees living in them.
    D．Farmers do not allow Lucy to conduct tests in their fields.

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    Here I'd like to talk about how to develop your curiosity and make use of it to make discoveries. Asking questions is the first step to make discoveries and find interesting answers when you are curious about something and want to know more about it.
    Firstly, write down the subject that you are interested in on a note card or piece of paper. Just put the main idea down, such as “Discover more about dinosaurs.”
    Next, think for a moment about what you already know about your subject and list information like the sentences below：
    1. Dinosaurs lived long before human beings appeared.
    2. Dinosaurs lived on the earth for more than 150 million years.
    3. Some dinosaurs fed on plants, some on meat.
    Thirdly, ask yourself “What can I do with what I want to learn？” On your paper, start writing down questions about the dinosaurs as you think of them：
    1. What's the best weather for dinosaurs to live in?
    2. How many kinds of dinosaurs are there?
    3. Have dinosaurs really disappeared?
    Fourthly, armed_with_your_list_of_questions,_you can now visit the nearest library or turn to computer to begin your research. As you learn more about your subject, you'll probably discover some new questions.
    For example, you might discover that dinosaurs disappeared about 65 million years ago. Why? What happened? Asking new questions can help you research your subject more deeply.
    The next time you find something interesting to research, take time to organize your thinking by asking good questions. And remember—learning more always bring more questions.
    小题1:While doing some research, you should take the following steps________.
    ①list what you want to know
    ②choose a research subject
    ③list what you already know
    ④discover new problems
    A．①④③②　　　　　　　B．①②④③
    C．②③①④D．②①④③
    小题2:What does the underlined sentence “armed with your list of questions” mean?
    A．Taking your list of questions with you to do more research.
    B．Writing down your list of questions before turning to the computer.
    C．Discussing your questions with your classmates for solution.
    D．Putting your questions aside before going to the library.
    小题3:According to the passage, which of the following is TRUE?
    A．You can find all the answers online.
    B．Learn more, and you'll have no questions.
    C．Asking questions is the only way for research.
    D．During the research, more questions may arise.
    小题4:The best title for this passage is________.
    A．Discovering Dinosaurs
    B．Asking Good Questions
    C．Finding Suitable Subjects
    D．Having Interesting Answers

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    “I can’t concentrate.” “My mind wanders when I try to study.” Lack of concentration is one of the most common complaints heard at school.
    We all have the ability to concentrate. Think of the times when you were attracted to a super novel or the times when you were playing your guitar or piano. But at other times your mind races from one thing to another. Here are some tips.
    Rest from time to time. Remember to take short breaks. Lectures are usually 50 minutes long, and that’s about the length of time most people can direct their attention to one task. But that’s just an average. Your concentration time might be shorter (20-35 minutes) or longer (perhaps 90 minutes).When you take a break, you get more oxygen to your brain! When we sit for long periods, blood tends to be pooled in our lower body and legs. Get up and walk around the room for a couple of minutes. As a result, more oxygen is carried to the brain and you can concentrate better.
    _______________If you study one subject for a long time, you may find it hard to concentrate. Many students improve their concentration by changing one subject to another every one to two hours. In this way you can pay more attention to something that’s different.
    Reward yourself. Give yourself a reward when you’ve completed a task. The task might be small, such as staying with a difficult paper until you’ve finished. But giving yourself a reward can help you be more interested in doing other tasks.
    Increase your activity level. Your concentration wanders more easily if you just read an article straight through. Instead, take the heading for each part and turn it into a question. For this part, that would be, “How can I increase my activity level while studying?” Then study that part to answer that question. Do this routinely. The questions give us a focus for each part and increase our involvement(参与).
    小题1:According to Paragraph 3, what’s the purpose of walking around?
    A．To help us stay fit.
    B．To benefit our lower body.
    C．To provide the brain with more oxygen.
    D．To increase our concentration time to 90 minutes.
    小题2:What’s the best title for Paragraph 4?
    A．Study for one hour each time.
    B．Do something difficult.
    C．Study in different ways.
    D．Change subjects.
    小题3:In the last paragraph, the writer suggests that______.
    A．we just read the heading of some articles
    B．we do our best to read an article straight through
    C．we ask ourselves questions about what we are reading
    D．we ask other people questions about the article we are reading
    小题4:The writer wrote the passage to______.
    A．encourage us to try to concentrate
    B．teach us how to concentrate while studying
    C．give us the reasons for a lack of concentration
    D．list the benefits we can get from concentration

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    Almost everyone has seen someone speed read.They appear to skim the text and still have read and absorbed the content.The people who have studied speed reading techniques will still read at different speeds；however they will undoubtedly beat those without experience.
    The best and most efficient way to learn to read fast is to join in classes，where speed reading skills will be explained clearly.
    The advantage of courses is that students will be shown several different strategies showing them to choose the ones they find easiest to understand the material they are reading.
    Students should try to learn all the strategies presented during their courses as, once these are mastered，they will see a dramatic improvement in their reading rate，after which they can choose their preferred style. Students will see the benefits of speed reading as soon as the techniques are applied to their main field of study.
    A traditional education builds habits in reading which a good speed reading course will  push aside，replacing with new techniques. A comprehensive course will also advise students how to become more efficient readers；hopefully this will also encourage the desire for self improvement as well as the desire to read.
    Lecturers in speed reading will usually take the time to teach students the importance of  preparing the environment they work in before they read a single work­ remember reading at speed is all about increasing the speed of comprehension not just the speed of reading! The satisfaction of reading faster and with better comprehension skills cannot be ignored；the techniques of speed reading increase the enjoyment of reading.Speed reading is a skill to be encouraged in each and every generation of new readers.
    小题1:What's the best title of this passage?
    A．Speed Reading Is an Important Skill
    B．Speed Reading Brings You Pleasure
    C．Better Attend a Special Class
    D．Your Reading Skill Have to Be Improved
    小题2:What is the best way that readers can improve their speed reading according to the    writer's opinion?
    A．To practice reading at different speeds.
    B．To read fast without complete understanding.
    C．To attend classes that teach speed reading.
    D．To experience satisfaction by reading.
    小题3: How does the writer suggest readers learn the strategies provided by the class?
    A．They should choose one suitable strategy to improve speed reading.
    B．They should choose the method suitable to their main field of study.
    C．They must follow the instructions of their teachers.
    D．They should try all of them in order to choose the suitable one.
    小题4: Which of the following can be inferred from the text?
    A．The aim of the reading course is only to increase the speed of reading.
    B．The writer thinks little of the reading habits formed by traditional education.
    C．The desire to read is the key factor to improve one's reading skill.
    D．The speed reading course in designed for future generations.

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    To most of us，school means classes，teachers，schedules，grades，and tests.But for the children at Sudbury Valley School in Massachusetts，school is very different.
    Firstly，there are no lessons.All the children，aged between 4 and 19，do whatever they want.There are no teachers—only “staff members”．The idea behind this is that you do not need to make children learn，because children want to learn anyway.“You do not need to say to a three year­old，‘Go explore your environment.'You can't stop them！” says Daniel Greenberg，a founder of the school.“But if you make children do what you want all day，they will lose all taste for learning.”
    At Sudbury Valley School，you will permit children to talk，read，paint，cook，work on computers，study French，play the piano，climb trees or just run around.Two boys spent three years just fishing!
    The other way that Sudbury Valley School is different is that the children can decide the rules.Every week，there is a school meeting where both children and staff have one vote each—even the four­year­olds.They decide the school rules，how to spend the school budget，and even which staff they want and do not want any more.
    When the school first opened in 1968，people said it would never work.But today，the school has 200 students，and 80%of its students go on to college. Even the two boys who went fishing all the time have successful careers today.One of them is a musician and the other is a computer scientist.
    小题1:What is the main topic of the article?
    A．An unusual school.B．Children's hobbies.
    C．A school without rules.D．Education in the US.
    小题2:What does the school believe?
    A．Teachers cannot teach children Well.
    B．Children learn best when they do what they want to do.
    C．Learning is for adults—children should only play.
    D．Children should only learn about one thing at a time.
    小题3:What does Daniel Greenberg say about three­year­olds?
    A．They love learning.
    B．They are very naughty.
    C．They want to be outside all the time.
    D．They are too young to learn anything.
    小题4:Who has the most power in the school meetings?
    A．The older children have more power than the younger children.
    B．A child has more power than an adult.
    C．The younger children have more power than the older children.
    D．Everybody has equal power.

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    Have you seen a yellow-and-black salamander (火蜥蜴)? How about a scarlet frog? Scientists haven’t spotted either species in more than 20 years. What happened to them? Are the creatures still out there, or are they extinct?
    Those are questions that scientists hope to answer. They recently set out around the world in search of those and other long-missing amphibians. An amphibian is an animal that spends part of its life in water and part on land. Frog, toads(蟾蜍), and salamanders are amphibians.
    The experts are looking for about 100 species. They are searching at least 14 countries on five continents. They will look for the salamander in North America. They hope to find the scarlet frog in South America. They’re also looking for species in Africa, Asia and Australia.
    Scientists are hopeful that they’ll find the amphibians—and soon! If the creatures are out there, they may need help. Many amphibians are endangered. The animals face many dangers including pollution and diseases. People cut down the forests where they live.
    “If researchers can find the missing creatures, they might be able to figure out how to save them,” explains expert Robin Moore. He began searching for the amphibians earlier this month.
    “This search will tell us a lot about how amphibians are doing,” Moore told WR News. “I don’t know what we will find, but that makes the search even more exciting.”
    Lost in the Wild
    Scientists’ hunt for missing amphibians is under way. Read about some of the species they hope to find.
    Turkestanian salamander
    This salamander is a mystery to scientists. Experts found a few of them more than 100 years ago, but none have been seen ever since.
    Gastric brooding frog
    Experts first discovered this frog in 1914 in eastern Australia. It may be extinct because of disease and habitat loss.
    Rio Pescado stubfoot toad
    Last sighting: 1995, in South America
    Scientists hope to find this spotted toad in rivers and rainforests in Ecuador. The animal faces threats including pollution and disease.
    小题1: Which of the following animals hasn’t been seen for over a century?
    A．Rio Pescado stubfoot toad.
    B．Gastric brooding frog.
    C．Turkestanian salamander.
    D．Scarlet frog.
    小题2:It can be learned from the passage that _____.
    A．the scarlet frog used to live in Africa
    B．researchers have no way to save amphibians
    C．the scientists will search 14 countries at most
    D．Robin Moore has begun his search for amphibians
    小题3: Why do the scientists want to find the missing amphibians?
    A．Because they want to rescue the missing amphibians.
    B．Because they want to set up a scientific program.
    C．Because they want to do a scientific research on the missing amphibians.
    D．Because they want to publish a report about the missing amphibians on WR News.
    小题4: What does Moore think of the search for endangered amphibians?
    A．It’s hopeful.B．It’s interesting.
    C．It’s tiring.D．It’s dangerous.

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    There is no denying that over the years college education has been accepted without the slightest doubt. All high school graduates should go, says conventional wisdom and statistical evidence, because college will help them earn more, become “better” citizens and be more responsible than those who don’t go.
    But college can never work its magic for everyone. Now with half our high school graduates attending college, those unfit for the pattern are getting more. College graduates are selling shoes and driving taxis; college students interfere with each other’s experiments and write false letters of recommendation in the fierce competition for admission into graduate schools. Others find no stimulation (激励) in their studies, and consequently have to drop out, which is often encouraged by college administrators.
    Some observers say the fault lies with young people themselves --- they are spoiled and expecting too much. But that’s a condemnation (谴责）of the students as a whole, and doesn’t explain all campus unhappiness. Others blame our society. Both are partly right. We have been told that young people have to go to college because our economy can’t absorb an army of untrained eighteen-year-olds. But disappointed graduates are learning that it can no longer absorb an army of trained twenty-two-year-olds, either.
    Some campus watchers suggest that college may not be the best, the proper or the only place for every young person after finishing high school. It seems that through the rosy (玫瑰的) glow of our own college experiences, we may have been looking at those surveys and statistics upside down. Perhaps college does not make people intelligent, ambitious, happy, or quick to learn things—maybe it is just the other way around. Intelligent, ambitious, happy, quick-learning people are merely those who are attracted to college in the first place. And perhaps all those successful college graduates would have been successful even without college education. This is heresy (异端邪说) to those who have been brought up to believe that if a little schooling is good, more has to be much better. But contrary evidence is beginning to pile up.
    小题1:According to the first paragraph, ______.
    A．people now no longer challenge college education
    B．people have great expectations for college education
    C．the author thinks youngsters should all go to college
    D．people still have a low opinion of college education
    小题2:More young people drop out of college because ______.
    A．they are no longer motivated in their studies
    B．they can start selling shoes and driving taxis
    C．they compete for admission to graduate schools
    D．college administrators encourage them to do so
    小题3:Who does the author think is responsible for campus unhappiness?
    A．young students who are all spoiled and expecting too much.
    B．our society that can’t offer enough jobs to college graduates.
    C．our society that has not enough jobs for high school graduates.
    D．young people as well as our society are to blame for all this.
    小题4:Which of the following statements is TRUE about those surveys and statistics?
    A．They prove high school graduates are smarter than college graduates.
    B．They are so convincing that we think of our rosy college experiences.
    C．They may have been misread because of our rosy college experiences.
    D．They prove wrong because they contradict our rosy college experiences.
    小题5:What is the meaning of the underlined sentence in Paragraph 4?     
    A．It is just the oppositeB．There is no right way
    C．It is the wrong wayD．There’s no other way
    小题6:What is the main purpose of this passage?
    A．To inform young people college education is no longer important now.
    B．To prove college education doesn’t make young people more intelligent.
    C．Toargueagainsttheideathatcollegeisthefirst choiceforallyoungsters.
    D．To tell young people that there’s something wrong with college education.

    查看答案和解析>>

    同步练习册答案