练习册

  • 练习册
  • 试题
    精英家教网 > 初中英语 > 题目详情
    DNA is the whole “map” of the human body. It is something that all humans have, and it tells the body what to do. DNA is the reason that we look like our parents, because we get some of their DNA to make our own.
    People have been trying to understand the human body for a long time, In1860, Mr Mendel discovered why we look the same as other people in our family. It is because of small things called “genes”(基因) in our body. In 1953, two scientists, Watson and Crick, found out that those small parts are really messages . They’re written in the DNA with a special language.
    In1961, another two scientists found the first “word” that they could understand in that language. It shows how DNA tells the cell﹙细胞﹚to build its parts. So far, scientists have found all the words in the DNA map, but we still do not understand what they all do. By understanding what just one “word ”means, we can help to save people from several illness. So the more we understand, the more doctors will be able to do.
    Most people hope that this will help to make better medicine and help sick people. Other people worry that when we learn more “words” and find out more information, we will use it in the wrong way, just to make people more attractive (有吸引力的)，or stop sick people getting jobs.
    小题1:When did Mr Mendel discover why we look the same as other people in our family?
    A. In 2000.     B. In 1961      C. In 1953     D In 1860
    小题2:What did the two scientists find in 1961? They found_____.
    A．all the words in the DNA map
    B．Small things called “genes” in our body
    C．The first “word” they could understand in that language
    D．those small parts are written in the DNA with a special language
    小题3:How can we help sick people if we understand more “words” in the DNA map?
    A．Make better medicine.B．Make them get jobs.
    C．Make maps for them.D．Make them attractive
    小题4:Which one is not true according to the article?
    A．We look like our parents because of “genes” in our body
    B．We have understand what all the words in the DNA map do
    C．DNA is the whole “map” of the human body.
    D．DNA tells the cell to build its parts.
    小题5:What do people think about this research about DNA?
    A．It can be only badB．It can be only good
    C．It can be good but won’t workD．It can be good and bad

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

    试题分析：这篇短文简要的介绍了额DNA的发现历史，并介绍了这一发现对于人类生活的影响及人们对此的不同意见。
    小题1:根据In1860, Mr Mendel discovered why we look the same as other people in our family. 描述，可知选D。
    小题2:根据In1961, another two scientists found the first “word” that they could understand in that language.描述，可知选C。
    小题3:根据Most people hope that this will help to make better medicine and help sick people.及上文描述，可知选A，制作更好的药物。
    小题4:根据So far, scientists have found all the words in the DNA map, but we still do not understand what they all do.可知选项B，描述错误。
    小题5:根据短文最后一段描述，可知人们对这一发现持正反两方面的意见。故选D，可能好可能坏。
    点评：本文浅显易懂，各个小题都能在文中找到适当依据。只要认真阅读短文，注意前后联系，就能顺利完成阅读。文章所设试题主要考察细节查找，做题关键是找出原文的根据，认真核查小题和原文的异同。
    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：初中英语 来源：不详 题型：阅读理解

    “Everything happens for the best.” Whenever I faced disappointment(失望),my mother would say this to me.
    After I left college in 1932, I decided to find a job in radio as a sports announcer(广播员). I went to Chicago and knocked at the door of every station. But unluckily, I was refused every time.
    At one station, a kind lady told me that big stations wouldn’t hire（雇佣）a person without any experience and suggested that I try my luck at smaller stations. Following her advice, I went back to Dixon, where I had grown up. There were no such jobs in Dixon, and my father said a newly-opened store wanted a local athlete(运动员)to work for it . I wanted this job, but I was refused again.
    “Everything happens for the best,” Mom reminded me. Dad offered me the car to look for a job. I tried WOC Radio in Davenport, Iowa. The program director, Peter MacArthur, told me they had already hired an announcer.
    As I left his office, I felt so frustrated(沮丧). “How can I become a sports announcer if I can’t get a job in a radio station?” I asked aloud.
    While I was waiting for the lift, I heard someone calling. It was MacArthur. “What was that you said about sports? Do you know anything about football?” Then he asked me to have a try. He was pleased with my performance, and he offered me a chance to work there.
    On my way home, I thought of my mother’s words: “If you carry on, one day something good will happen. Something wouldn’t have happened if without the failure before.”
    小题1:Why couldn’t the writer find a job at big radio stations?
    A．Because he never graduated from college.
    B．Because he didn’t work hard in college.
    C．Because he didn’t have much experience.
    D．Because he didn’t know about sports.
    小题2:Which of the following is the correct order of events?
    a. The writer got a job as a sports announcer at a radio station.
    b. The writer was refused when he wanted jobs in Chicago.
    c. The writer graduated from college.
    d. The writer went back to his hometown to look for a job.
    A．cbdaB．cbadC．bcdaD．bcad
    小题3:Which of the following is TRUE?
    A．The writer’s parents didn’ t want him to be a sports announcer.
    B．There were no radio announcer jobs in the writer’s hometown.
    C．The writer became uninterested in being a sports announcer.
    D．The writer got a job as a sports announcer in Dixon at last.
    小题4:According to the last paragraph, what did the writer’s mom want to tell him?
    A．He shouldn’t be a sports announcer.
    B．Disappointment leads to failure.
    C．He should be proud of himself.
    D．Everything will be OK if he keeps trying.

    查看答案和解析>>

    科目：初中英语 来源：不详 题型：完形填空

    Everyone    1    tired sometimes. When you are tired, You should follow the doctor’s advice. First, you should go to bed early    2    a few nights. You shouldn’t   3  at night or study  4  . Having a good rest   5    good for your health. Second, you should   6  every day. Third, you should eat fruit and other    7   ,and it’s important    8  a balanced diet .Don’t    9   stressed out , or it makes you sick. You should    10   some music . You shouldn’t study when you are tired . If you take the advice above , you’ll be a healthy person.
    小题1:
    A．getsB．getC．gotD．getting
    小题2:
    A．sinceB．forC．inD．at
    小题3:
    A．go awayB．go thereC．go outD．go over
    小题4:
    A．lateB．latelyC．untilD．hard
    小题5:
    A．isB．areC．amD．was
    小题6:
    A．exercisesB．exerciseC．take exercisesD．sports
    小题7:
    A．healthing foodB．healthy foodC．health foodD．food healthing
    小题8:
    A．to eatB．eatingC．eatD．ate
    小题9:
    A．isB．giveC．needD．get
    小题10:
    A．hearB．hear ofC．listenD．listen to

    查看答案和解析>>

    科目：初中英语 来源：不详 题型：阅读理解

    New rules and behavior standards（行为规范）for the middle school students came out. Middle schools are going to use a new way to decide who the top students are. The following are some of the new rules.
    You should not be allowed to dye（染）your hair, smoke or drink. You should not copy others’ work in an exam. Don’t do it again if you did it!
    Good students love animals and care for other people. Being kind to animals is being kind to ourselves. Be friendly to the people around you. Try to think of others, not only yourself.
    Don’t look down on new ideas. Everyone’s ideas are important. You should welcome them, because new ideas make life better for everyone.
    Learn to protect yourselves. If you have to go home late, you should let your mother or your father know.
    Use the Internet carefully. The Internet can be very useful for our studies. But some things on the Internet aren’t good for teenagers, so try to look at web pages that are good for you.
    小题1:The new school rules will help teenagers by telling them ________.
    A．how they can study wellB．what they should do at school
    C．what is right and what is wrongD．how they can pass an exam
    小题2:Good websites can ________.
    A．be a waste of timeB．do homework for children
    C．make life busierD．help children with their studies
    小题3:According to the passage, which of the following is NOT true?
    A．It’s not polite to dye hair for everyone
    B．Don’t copy others’ work in an exam
    C．Be kind to others and try to think of others
    D．Don’t look down on new ideas
    小题4:The passage mainly tells us how to ________.
    A．protect ourselvesB．be the top students
    C．care for othersD．use the Internet

    查看答案和解析>>

    科目：初中英语 来源：不详 题型：阅读理解

    A
    Do you feel a little sleepy after lunch? Well, that’s normal (正常). Your body slows down then. What should you do about it? Don’t drink coffee! Instead, take a nap (打盹).
    It’s good to have a daily nap. First of all, you are more energetic after napping. You remember things better and make fewer mistakes. Also, you can learn things more easily after taking a nap. A nap may improve your self-confidence (自信) and make you more active. It may even cheer you up. But, there are some rules you should think about taking a nap.
    First, take a nap in the middle of day.
    Next, a 20-minute nap is best. If you sleep longer, you may fall into a deep sleep. After waking from a deep sleep, you will feel worse. Also, you should set an alarm clock. That way, you can fully relax during your nap. You won’t have to keep looking at the clock so you don’t sleep too much.
    Now, the next time you feel sleepy after lunch, don’t get stressed. Put your head down, close your eyes, and take a nap.
    小题1:It is normal to get sleepy for you at noon after       .
    A．breakfastB．lunchC．dinnerD．supper
    小题2:After taking a nap, you may feel more      .
    A．stressedB．energeticC．sleepyD．friendly
    小题3:The proper (合适的) time for taking a nap is       .
    A．as long as you likeB．eight hours
    C．about twenty minutes D．all day and night
    小题4:What can help you have a fully relaxing nap according to the passage?
    A．A cup of coffee.B．A quick meal.
    C．An alarm clock.D．Having a dream.
    小题5:What is the text mainly about?
    A．Why and how to take a nap.
    B．Rules to improve your self-confidence.
    C．How to make fewer mistakes.
    D．When to take a nap.

    查看答案和解析>>

    科目：初中英语 来源：不详 题型：阅读理解

    When you read an article you will understand and remember it better if you can work out how the writer has put the ideas together．Sometimes a writer puts ideas together by asking questions and then answering them．For example，if the article is about groundhogs（土拨鼠），the set of questions in the writer’s head might be：
    What does a groundhog look like？
    Where do groundhogs live？
    What do they eat？…
    In the article，the author might answer those questions．
    Sometimes an author writes out her questions in the article．These questions give you signals．They tell you what the author is going to write next．Often an author has a question in her head but she doesn’t write it out for you．You have to work out her question for yourself．Here’s a sample reading for you to practice this method.
    Earthworms
    Do you know how many kinds of earthworms there are？There are about 1800 kinds in the world！ They can be brown，purple，green．They can be as small as 3 cm long and as large as 3 m long．
    The best time to see earthworms is at night，especially a cool，damp night．That’s when they come up from their burrows（地洞）to hunt for food．Earthworms don’t like to be in the sun．That’s because they breathe through their skin，and they can’t breathe if their skin gets too dry．Earthworms must come out of the earth if it rains a lot，because they can't breathe in their flooded burrows．What a dangerous life！
    Earthworms don't have eyes，so how can they tell when it's dark？ They have special places on their skin that are sensitive to light．These spots tell whether it’s light or dark．If you shine a flashlight on an earthworm at night，it will quickly disappear into the ground．
    Earthworms don't have ears either，but they can hear by feeling movements in the earth．If you want to hear like an earthworm，lie on the ground with your fingers in your ears．Then have a friend stamp his or her feet near you．This is how earthworms feel birds and people walking，and moles digging，near them．
    Earthworms are useful．Farmers and gardeners like having lots of earthworms in their land because the worms help to make better soil when they dig．That digging keeps the soil loose and airy（通风的）．In one year earthworms can pile up as much as 23,000 kg of castings in an area about the size of a football field．
    小题1:What’s the purpose of reading Earthworms?
    A．To show the special life facts of earthworms.
    B．To explain the differences from the groundhogs.
    C．To put the writer’s idea into real use.
    D．To make the readers think more clearly.
    小题2:Which question CANNOT be answered in the passage?
    A．How do earthworms help with gardeners?
    B．What life are earthworms living with?
    C．When may people observe earthworms?
    D．Why can human listen like earthworms?
    小题3:How can you understand Earthworms better according to this passage?
    A．Read, ask and answer questions in your own head while reading.
    B．Read to work out all the questions in the writer’s head while reading.
    C．Read and check all the things that are not clear to you again and again.
    D．Read for general ideas and discuss or compare with other similar topics.
    小题4:What’s the best title for the passage?
    A．One way to help with understanding
    B．One way to practice with a new idea
    C．One way to learn to be a wise writer
    D．One way to be clearer about worms

    查看答案和解析>>

    科目：初中英语 来源：不详 题型：阅读理解

    If the child has been brought up in a loving, openly communicative environment, the relationship with parents would be a strong one．It is only when there are ongoing troubles in the relationship between parents and the child that there is a breakdown in communication．
    When parents are going through difficulties in their own relationship, the child sometimes develops guilt．The child can hold himself or herself responsible for the breakdown in relationship between the parents．This needs to be explained to the child, who won’t speak out this guilt．
    The teenage years are emotionally sensitive years to the outside world．For the first time the child realizes his or her position in society．Friends suddenly become more important than parents．It is during this time that the relationship between children and parents is tested．If the bond with parents is strong, the child will not be influenced by the drug and alcohol culture．If the bond is weaker, the child will end up with problems．
    During such times, one of the effective ways to deal with the problems is to discuss the problem with the child．As parents, you will need to discuss the results of each choice and then leave the final decision to the child．Forcing parental will on children is counterproductive (适得其反的), especially at this age．Forcing parental will at this time will stop communicating and then you will not know what is happening in their life．Whatever the problem is, the child need never be made to feel lonely．The moment that happens, the possibility of serious self-harm is raised．
    Any problem at this age can be dealt with by a flexible (灵活的) way by parents．Discuss things calmly．Leave the decision to the individual．Make yourself available for any help or support that the child hopes．The child will feel comfortable when allowed the freedom of choice．
    小题1:If parents have trouble with their relationship, the child __________ ．
    A．will communicate with their parents
    B．will be responsible for the trouble
    C．will feel guilty about the trouble
    D．will help the parents recover
    小题2:According to the text, what will lead the child to get into trouble?
    A．The sense of responsibility．
    B．A weak bond with parents．
    C．Feeling depressed or stressed
    D．The child’s confidence．
    小题3:Which of the following ways can help solve the children’s problem?
    A．Letting the children be．
    B．Discussing it with the children．
    C．Forcing parental will on them
    D．Meeting their demands．
    小题4:The underlined word “forcing” can be replaced with the word“________ .”
    A．Weakening．B．Pressing．
    C．Understanding．D．Losing．
    小题5:What is the text mainly about?
    A．The bond between parents and children．
    B．Causes of teenagers’ problems．
    C．Teenagers’ problems and solutions．
    D．Always letting the children decide．

    查看答案和解析>>

    科目：初中英语 来源：不详 题型：阅读理解

    Can you swim? Do you like swimming? Well, how can you learn to swim? I think the best way is to go into the water and learn. I’m afraid you’ll never learn to swim just by reading books about Swimming or looking at others swimming. It’s the same with the English study. We must practice, practice and practice.
    Listening and speaking are very important for beginners. We can listen to English programs on radio. You may just understand a few words. It doesn’t matter. Just be relaxed, try to catch every word.
    Somebody may be a good listener, but he is afraid to speak because he’s afraid of making mistakes. You know we sometimes make mistakes when we speak Chinese. Don’t be afraid. We must be brave. If you really want to learn English well, you must try to speak with everyone as long as he knows English. When there’s nobody to talk with, you can talk to yourself in English. It’s interesting and also a good way to practice your spoken English. Remember, the more you speak, the fewer mistakes you’ll make.
    Reading and writing are more important for senior（年级较高的）school students. First we must choose the books we’re interested in. A lot of reading will improve your language sense. This is very important.
    It’s easier said than done. Well, let’s do more practice from now on. I’m sure you’ll learn English well in this way.
    根据短文内容，从题中所给的A、B、C、D四个选项中，选择最佳答案。（10分）
    小题1: What’s the best way to learn to swim?
    A．Reading books about swimming.
    B．looking at others swimming.
    C．Going into the water and learning.
    D．Listening to others’ advice.
    小题2:According to the passage, which of the following is TRUE?
    A．Listening is very important while speaking is not.
    B．The more you speak, the more mistakes you’ll make.
    C．Listening and speaking are very important for beginners.
    D．You can only learn English by listening.
    小题3:What’s more important for senior school students?
    A．Speaking and writing.B．Writing and listening.
    C．Speaking and listening.D．Reading and writing.
    小题4:Wat’s the best way to learn English well according to the passage?
    A．By reading.B．By listening to the radio.
    C．By speaking.D．By doing more practice.
    小题5:Which is the best title for the passage?
    A．How to Learn English.B．Easier Said Than Done.
    C．Listen First, Speak Second.D．How to learn to Swim.

    查看答案和解析>>

    科目：初中英语 来源：不详 题型：阅读理解

    Millions of people around the world cook their food on fire every day. People must spend lots of money on cooking fuel. However, there is a much easier and cheaper way to cook food using energy from the sun.
    Sun-cookers have been used for centuries. A Swiss scientist made the first sun-cooker in 1777. Today, people are using sun-cookers in many countries around the world. People use them to cook food and to heat drinking water.
    There are three kinds of sun-cookers. The first is a box cooker. It is designed with a special wall that collects sun-shine into the box. A box cooker is good for slow cooking of a lot of food.
    The second kind of sun-cooker is a panel cooker. It has several flat walls that concentrate the sun-shine on the food. People can build panel cookers quickly. They do not cost much. In Kenya, for example, panel cookers cost just two dollars.
    The third kind of sun-cooker is a parabolic cooker. It has rounded walls that concentrate sunlight into the bottom of the cooker. Food cooks quickly in parabolic cookers. However, these cookers are hard to make. They must be moved again and again to follow the sun. Parabolic cookers can also cause burns and eye injuries if they are not used correctly.
    You can make sun-cookers from boxes or heavy paper. They will not catch fire. Paper burns at 232℃. A sun-cooker never gets hotter than that. Sun-cookers cook food at low temperatures over long periods of time. This allows people to cook food and do other things at the same time.
    小题1:What does the underlined word fuel mean?
    A．燃料B．菜谱C．调料D．粮食
    小题2:If you want to cook food quickly, which kind of sun-cooker is your best choice?
    A．a box cookerB．a panel cooker
    C．a parabolic cookerD．fire cooker
    小题3:Which kind of sun-cooker costs very little?
    A．a box cookerB．a panel cooker
    C．a parabolic cookerD．fire cooker
    小题4:Which of the following is TRUE?
    A．The first sun-cooker was made by a Swiss soldier.
    B．Sun-cookers often get hotter than 232℃.
    C．Parabolic cookers can be dangerous sometimes.
    D．It is more expensive to cook with a sun-cooker than on fire.
    小题5:What is the best title of this passage?
    A．How to Be a Good Cook?B．Cooking Meals With the Sun
    C．How to Save Energy?D．Different Ways of Cooking

    查看答案和解析>>

    同步练习册答案