练习册

  • 练习册
  • 试题
    精英家教网 > 高中英语 > 题目详情
    Warm water freezes more quickly than cold water. Sir Francis Bacon said that almost four hundred years ago. But few people believed him until 1970. In that year a Canadian scientist George Kill proved the English professor was right. Dr Kill filled an open oil pail(桶) with cold water. He filled another with warm water. He put both in the same low temperature. The warm water froze first. The lack of covers on the pails is the secret. Some of the warm water changed into vapor. This meant that less of the warm water was left to be frozen. And so the warm water froze faster than the cold water even though it had a greater temperature drop to make.
    小题1:Hundreds of years ago, Sir Francis Bacon found _______.
    A．the temperature of warm water drops faster than that of cold water
    B．warm water is heavier than cold water
    C．warm water has the same temperature as cold water
    D．warm water is not as useful as cold water
    小题2:What Sir Francis Bacon said was right, but people didn't believe him until _______.
    A．late in the 19th century B．early in the 20th century
    C．three years agoD．late in the 20th century
    小题3:Leave a pail with warm water and another pail with cold water in the same low temperature, you’ll find that _______.
    A．cold water freezes first
    B．warm water turns into ice before cold water
    C．warm water and cold water freeze at the same time
    D．much of cold water is changed into air.
    小题4:Why does warm water freeze first in the same freezing weather?
    A．Because some of the warm water turns to vapor, the amount(数量) becomes less than that of cold water.
    B．Because warm water is lighter than cold water.
    C．Because the temperature of warm water is lower than that of cold water.
    D．Because cold water freezes with more difficulty than warm water.

    小题1:A
    小题2:D
    小题3:B
    小题4:A
    文章向我们介绍了一种古老的理论：热水比冷水结冰更快的。并解释了原因—热水的水蒸气带走了部分热水，剩下的热水变老了，这才是热水比冷水结冰更快的原因。
    小题1:A 推理题。文章第一句Warm water freezes more quickly than cold water.温水比冷水更快结冰，热水的温度比冷水的温度要高，而结冰的时候都是零度了，这说明热水的温度降的更快。故A正确。
    小题2:D 细节题。根据文章第二行But few people believed him until 1970.人们直到20世纪70年代才相信这个理论。20实际70年代属于20世纪的晚期，故D正确。
    小题3:B 细节题。根据文章4,5行Dr Kill filled an open oil pail(桶) with cold water. He filled another with warm water. He put both in the same low temperature. The warm water froze first.说明温水更快结冰，那么是在冷水结冰之前就结冰了，故B正确。
    小题4:A 细节题。根据文章倒数3,4行Some of the warm water changed into vapor. This meant that less of the warm water was left to be frozen.说明部分热水变成了水蒸气，留下的热水变少了，这才是热水比冷水结冰更快的原因。故A正确。
    点评：科技类说明文一直是高考中必考内容，本文相对比较简单，生词较少，难度较小，此类文章不要有畏难心理。对于那些生词，不要畏惧，因为对答案都没有影响。
    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

    Everybody hates rats. But in the earthquake capitals of the world—Japan, Los Angeles, Turkey—rats will soon be man’s new best friends.
    What happens after an earthquake? We sent in rescue dogs. Why? Because they can smell people. Dogs save lives. They help rescuers to find living people. But dogs are big and they can’t get into small spaces. So now a new research project is using a smaller animal to save lives: the rat.
    How does it work? First, the rat is trained to smell people. When this happens, the rat’s brain gives a signal (信号). This is sent to a small radio on its back, and then the rescuers follow the radio signals. When the rat’s brain activity jumps, the rescuers know that someone is alive. The rat has smelled that person.
    Although there are already robots which can do this job, rats are better. Christian Linster at Cornell University, New York, says, “‘Robots ’noses don’t work well when there are other smells around. Rats are good at that.” Rats can also see in the dark. They are cheaper and quicker to train than dogs, and unlike robots, they don’t need electricity(电)!
    The “rat project” is not finished, but Julie Ryan of International Rescue Corps in Scotland says, “It would be fantastic. A rat could get into spaces we couldn’t get to and a rat would get out of it if it wasn’t safe.” Perhaps for the first time in history, people will be happy to see a rat in a building (but only after an earthquake, of course).
    小题1:In the world earthquake capitals, rats will become man’s best friends because they can    .
    A．take the place of man’s rescue jobs
    B．find the position of people alive who are trapped in buildings
    C．serve as food for people alive who are trapped in buildings.
    D．get into small spaces
    小题2:In doing rescue jobs,        .
    A．rats smell better than dogs
    B．dogs don’t need to be trained to smell people
    C．robots’ sense of smell can be affected by other smells around
    D．rats can see in the dark and smaller than robots
    小题3:Rats have all the following advantages EXCEPT that       .
    A．they are more fantastic than other animals
    B．they are less expensive to train than dogs
    C．they don’t need electricity
    D．they are small and can get into small places
    小题4:After reading the passage we can know       .
    A．at present rats have taken the place of dogs in searching for people
    B．the “rat project” has been completed
    C．people are now happy to see a rat in a building
    D．now people still use dogs and robots in performing rescues

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    As you grow older, you’ll be faced with some challenging decisions—like whether to cut class or try cigarettes．Making decisions on your own is hard enough, but when other people get involved and try to pressure you one way or another it can be even harder．People who are your age, like your classmates, are called peers．When they try to influence how you act, to get you to do something, it’s called peer pressure．
    Peers can have a positive influence on each other．Maybe another student in your science class taught you an easy way to remember the planets in the solar system．Maybe you got others excited about your new favorite book, and now everyone’s reading it．These are examples of how peers positively influence each other．
    Sometimes peers influence each other in negative ways．For example, a few kids in school might try to get you to cut class with them; your soccer friend might try to convince you to be mean to another player and never pass him the ball．
    It is tough to be the only one who says “no” to peer pressure, but you can do it．Paying attention to your own feelings and beliefs about what is right and wrong can help you know the right thing to do．
    You’ve probably had a parent or teacher advising you to “choose your friends wisely．” Peer pressure is a big reason why they say this．If you choose friends who don’t cut class, smoke cigarettes, or lie to their parents, then you probably won’t do these things either, even if other kids do．
    If you continue to face peer pressure and you’re finding it difficult to handle, talk to someone you trust．Don’t feel guilty if you’ve made a mistake or two．
    小题1:For whom is the passage most probably written?
    A．Students．B．Parents．C．Teachers．D．Doctors．
    小题2:In the last three paragraphs, the author mainly_____．
    A．explains why friendship is so important
    B．gives advice on how to deal with peer pressure
    C．discusses how peers influence us
    D．shows how to make more good friends
    小题3:Which of following may help handle peer pressure?
    A．Spending more time with classmates．
    B．Taking up more relaxing hobbies．
    C．Choosing friends with no bad habits．
    D．Helping others who are in trouble．
    小题4:What is the topic of the passage?
    A．Friendship．B．Making decisions
    C．Self-confidenceD．Peer pressure

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    Derrius Quarles, 19, had an unhappy childhood. But the Chicago teen didn’t give up. He tried his best and won $1 million in college scholarships (奖学金)! Now Derrius is a successful college student with a bright future.
    When Derrius was 4, his father was killed. His mother couldn’t take care of him because of taking drugs. Derrius and his 9-year-old brother sometimes had to steal food to eat. Derrius felt different from other kids. In seventh grade, Derrius went to live in a foster home (寄养家庭). His foster parents weren’t nice to him. They told him that he’d never be anything in life.
    Derrius didn’t do his best in school. The summer after ninth grade, that changed. Derrius had signed up for a biology class. He didn’t go to class the first day. On the second day, he showed up late. His teacher took him outside. She told him he was smart, but that he was wasting his potential (潜力). The talk inspired him and he planned to prove that he could be anything if he worked hard enough.
    Adults at a summer program helped Derrius find out about scholarships he could earn to pay for college. In his senior year, Derrius filled out lots of applications. He told his friends, “You’re not going to see me for a long time.” Derrius’s hard work paid off. He won more than $1 million in scholarships! He has a lot to be proud of. But he’s most proud of helping others. Derrius gives speeches to teens, telling them how to find scholarships. In high school, Derrius got help buying a computer. He wanted to help others who needed them. Last year, he gave two laptops to high schoolstudents. There’s a lot of work in his future. Derrius doesn’t mind — hard work has got him where he is today. He knows it can take him anywhere.
    小题1: From Paragraphs 2 and 3, we can learn that Derrius _____.
    A．always studied hard in school
    B．lived in the same foster home with his brother
    C．hated his parents very much
    D．was encouraged a lot by his biology teacher
    小题2:The underlined word “it” in the last paragraph refers to _____.
    A．great successB．a scholarship
    C．hard workD．a computer
    小题3:What kind of person do you think Derrius is?
    A．Lazy but kind-hearted.
    B．Selfish and naughty.
    C．Confident but troublesome（带来麻烦的）.
    D．Determined and generous（慷慨的）.
    小题4:What does the author want to tell us?
    A．The way to win a scholarship to a college.
    B．The importance of family background.
    C．Never forget people who have helped you.
    D．Hard work pays off sooner or later.

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    When I was in the third grade, I was picked to be the princess(公主）in the school play. For weeks my mother had helped me practice my lines. But once on stage, every word disappeared from my head. Then my teacher told me she had written a narrator's（解说者的）part for the play, and asked me to change roles. Though I didn't tell my mother what had happened that day, she sensed my unhappiness and asked if I wanted to take a walk in the yard. 
    It was a lovely spring day. We could see dandelions(蒲公英）popping through the grass in bunches, as if a painter had touched our landscape with bits of gold. I watched my mother carelessly bend down by one of the bunches. "I think I am going to dig up all these weeds, "she said. "From now on, we'll have only roses in this garden. "
    "But I like dandelions, "I protested. "All flowers are beautiful-even dandelions!"
    My mother looked at me seriously. "Yes, every flower gives pleasure in its own way, doesn't it?" she asked thoughtfully. I nodded. "And that is true of people, too, " she added. 
    When I realized that she had guessed my pain, I started to cry and told her the truth. 
    　　“But you will be a beautiful narrator, ”she said, reminding me of how much I loved to read stories aloud to her. 
    Over the next few weeks, with her continuous encouragement, I learned to take pride in the role. The big day finally came. A few minutes before the play, my teacher came over to me. “Your mother asked me to give this to you, ”she said, handing me a dandelion. After the play, I took home the flower, laughing that I was perhaps the only person who would keep such a weed. 
    小题1:The girl did not play the role of the princess mainly because . 
    A．she felt nervous on the stage.
    B．she lost her interest in that role.
    C．she preferred the role of the narrator
    D．she had difficulty memorizing her words
    小题2:Why did the mother suggest a walk in the garden?
    A．To remove the dandelions
    B．To enjoy the garden scene
    C．to have a talk with her daughter.
    D．to help her daughter with the play.
    小题3:What is the main idea of the story?
    A. Everybody can find his or her own way to success. 
    B. Everybody has his or her own value in the world. 
    C. Everybody should learn to play different roles
    D Everybody has some unforgettable memory. 

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    Everyday we talk about and use the Internet, but how many of us know the history of the Internet?
    Many people are surprised when they find that the Internet was set up in the 1960s. At that time, computers were large and expensive. Computer network didn’t work well. If one computer in the network broke down, then the whole network stopped. So a new network system had to be set up. It should be good enough to be used by many different computers. If part of the network was not working, information could be sent through another part. In this way computer network system would keep on working on the time.
    At first the Internet was only used by the government, but in the early 1970s, universities, hospitals and banks were allowed to use it too. However, computers were still very expensive and the Internet was difficult to use. By the start of the 1990s, computers became cheaper and easier to use. Scientists had also developed software that made “surfing” in the Internet more convenient.
    Today it is easy to get on-line and it is said that millions of people use the Internet every day. Sending e-mail is more and more popular among students.The Internet has now become one of the most important parts of people’s life.
    小题1:The Internet has a history of more than _______ years.
    A．sixtyB．fortyC．fiftyD．twenty
    小题2:A new network system was set up to _________.
    A．make computers cheaper
    B．make itself keep on working all the time
    C．break down the whole network
    D．make computers large and expensive
    小题3:__________ made “surfing” the Internet more convenient.
    A．Computers
    B．Hardware
    C．Software
    D．Information
    小题4:Which of the following is TRUE?
    A．In the 1960s, computer network worked well.
    B．In the early 1970s, the Internet was easy to use.
    C．Today it’s still not easy to get on-line.
    D．Sending e-mail is now more popular among students than before.

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：完形填空

    Tom grows the nicest vegetables and fruits and the most beautiful flowers in the village. Plants grow in Tom’s garden all through the __1__ and they are much __2__.
    Tom cuts some flowers for his sitting room table, eats some fruits and vegetables, but he __3__ most of them in the market. His vegetables, fruit and flowers are so __4__ and beautiful that they sold much more __5__ in the market than those of other villagers.
    How does Tom grow these beautiful things? He is so __6__ that he just sits under his orange tree with his radio.
    He __7__ the music all day.
    That is quite true. Tom __8__ things in spring, summer, autumn and winter. After that he sits with his radio. And everything __9__. It is the music that does the work. Tom knows more clearly that music makes the biggest vegetables and the most beautiful flowers. Plants love __10__ as much as people.
    小题1:
    A．weekB．monthC．seasonD．year
    小题2:
    A．betterB．worseC．lessD．later
    小题3:
    A．buysB．sellsC．borrowsD．lends
    小题4:
    A．dearB．badC．bigD．small
    小题5:
    A．politelyB．quicklyC．slowlyD．carefully
    小题6:
    A．angryB．busyC．tiredD．lazy
    小题7:
    A．listens toB．hearsC．watchesD．speaks
    小题8:
    A．fillsB．plantsC．throwsD．makes
    小题9:
    A．doesB．moves C．growsD．plays
    小题10:
    A．workB．rainC．storiesD．music

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    Most people regard zoos as safe places for animals, where struggles such as difficulty finding food and avoiding predators（捕食性动物） don't exist. Without such problems, animals in zoos should live to a ripe old age. But that may not be true for the largest land animals on Earth. Scientists have known that elephants in zoos often develop diseases, joint problems and behavior changes. Sometimes, they even become unable to have babies.
    To learn more about how captivity(监禁) affects elephants, a team of international scientists led by Mason, a biologist, compared the life spans of female elephants born in zoos with female elephants living outdoors in the wild. Zoos keep detailed records of all the animals in their care, documenting factors such as birth dates, illnesses, weight and death. These records made it possible for the researchers to analyze 40 years of data on 800 elephants in zoos.
    The team found that female elephants born in zoos lived an average of 16.9 years. Their wild counterparts（同类事物） who died of natural causes lived an average of 56 years——more than three times as long.
    Scientists don't yet know for sure why wild elephants seem to live so much better than their zoo-raised counterparts. Mason thinks stress and obesity(肥胖) may be to blame. Zoo elephants don't get the same kind of exercise as they do in the wild, and most are very fat. Elephant social lives are also much different in zoos than in the wild, where they live in large groups.
    Another finding from the study showed that elephants born in zoos were more likely to die earlier than elephants captured in the wild and brought to zoos. Mason suggests stress in the mothers in zoos might cause them to have babies that are less likely to survive.
    The study raises some questions about acquiring more elephants to keep in zoos. While some threatened and endangered species living in zoos reproduce successfully and keep healthy populations, that doesn't appear to be the case with elephants.
    小题1:The text tells us that zoo elephants are different from other zoo animals because they________
    A．develop health problems.
    B．1ive to a ripe old age.
    C．are not afraid of predators.
    D．have difficulty eating food.
    小题2:What do the scientists find in their research?
    A．Female elephants live longer than male elephants.
    B．Female zoo elephants die earlier than their wild counterparts.
    C．Female zoo elephants live longer than their wild counterparts.
    D．Both elephants in zoos and those in the wild live in large herds.
    小题3:Which of the following does the author suggest in the last paragraph?
    A．Zoo-born elephants should be attended more carefully
    B．Elephants are no longer an endangered species.
    C．It may not be a wise policy to keep elephants in the zoo.
    D．Zoos should keep more animals except elephants.
    小题4:Which of the following can be the best title?
    A．Comparison between two species of elephants
    B．Longer lives for wild elephants
    C．Female elephants suffer from poor health.
    D．Longer lives for zoo animals.

    查看答案和解析>>

    科目：高中英语 来源：不详 题型：阅读理解

    The space shuttle Discovery has had a long and busy career. For 27 years, it has worked for NASA, carrying astronauts to space and back on 39 missions. On March 9, 2011, after returning from its final voyage, the world’s most traveled spaceship was retired.
    A crowd of shuttle workers, reporters and schoolchildren waited to greet Discovery at Kennedy Space Center in Cape Canaveral, Florida. Three minutes before noon, they watched as the shuttle appeared in the sky and made one last touchdown. “For the final time: wheels stop,” Discovery’s commander Steven Lindsey said when the shuttle rolled to a stop.
    Discovery’s final trip was to the International Space Station (ISS), a giant space lab in the sky. Discovery’s crew took care of the last U.S. construction project at ISS. They delivered 10 tons of supplies for the ISS. The six-person crew also dropped off an unusual companion for ISS’s researchers: a human-like robot named Robonaut 2. Astronauts will assemble（组装）R2 at the ISS over several months.
    Now, NASA is winding down its shuttle programme. NASA is to begin work on new spaceships that can travel longer distances. Discovery’s retirement is the first of three. Endeavor, another shuttle, is scheduled to make its final voyage soon. And Atlantis’s last trip is planned for the end of June.
    Museums across the country have requested the retired shuttles. The Smithsonian’s Air and Space Museum, in Washington, D.C., was the lucky recipient（接收者）of Discovery. The museum’s collection contains hundreds of NASA artifacts.
    Where will the other shuttles go? You’ll have to wait to find out. NASA will announce its decision on April 12, the 30th anniversary of the first space shuttle launching. Stay tuned!
    小题1:As part of the final mission, Discovery’s crew___________.
    A．carried researches to space
    B．assembled the Robonaut 2 at the ISS
    C．brought supplies to the ISS
    D．went on a spacewalk
    小题2:The underlined phrase “winding down” in Paragraph 4 probably means _________.
    A．improvingB．endingC．changingD．testing
    小题3:What can we infer from the text?
    A．Discovery completed 39 missions during its two decades of space travel.
    B．The ISS is a big project and six researchers live on the station.
    C．American space exploration will focus on longer missions.
    D．The shuttles Endeavor and Atlantis will make their last missions next month.
    小题4:According to the text, we can learn about ___________.
    A．people’s opinions of Discovery’s retirement
    B．the government’s concern about the shuttles’ future
    C．the shuttles’ final homes after retirement
    D．museums’ great interest in the retired shuttles

    查看答案和解析>>

    同步练习册答案