练习册

  • 练习册
  • 试题
    精英家教网 > 初中英语 > 题目详情

    On June 26, 2000, two scientists, called Francis Collins and Craig Venter, told the world that they could now read the whole “map” of the human body: DNA. DNA is something that everybody has, and it tells the body what to do. DNA is the reason that we look like our mother and father, because we get some of their DNA to make our own.

    People have been trying to understand the human body for a long time. In 1860, Gregor Mendel discovered a special reason why we look the same as other people in our family. It is because of small things named “genes” in our body. In 1953, James Watson and Francis Crick made another discovery and found out that those small parts are real messages written in the DNA with a special language.

    In 1961, Marshall Nirenberg and Johann Matthaei found a message in DNA showing how DNA tells the cell (细胞) to build its parts. Scientists have now 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 save more people from several illnesses.

    Most people hope that this will help make better medicine and help sick people. Other people worry that when people begin to know more words and find out lots of other information, we might use it in a wrong way, just to make people more attractive, or stop sick people from getting jobs. Man would have to meet a lot of trouble if DNA technic wasn’t limited in use.

    根据短文内容，选择最佳答案。

    1.What did the two scientists first discover in 1961?

    A. The “map” of DNA. B. A new illness.

    C. The language of DNA. D. A message of DNA.

    2.What can we do if we understand some “words” of the language inside the body?

    A. Make people get new jobs. B. Make medicine for illnesses.

    C. Make maps of human. D. Make people less attractive.

    3.What do people think about this work?

    A. It can cause good or bad results. B. It can cause only good results.

    C. It can cause good results but won’t work. D. It can cause only bad results.

    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：黑龙江省哈尔滨市道外区2019届九年级升学调研测试（一模）英语试卷 题型：单选题

    —Did you buy a large house?

    —No, not really, at least not as large as ______.

    A. yours B. your C. you

    查看答案和解析>>

    科目：初中英语 来源：安徽省滁州市全椒县2017-2018学年八年级（下）期中英语试卷 题型：单选题

    My grandmother __________ watch TV after dinner． but now she_______ taking a walk

    A. is used to； is used to

    B. is used to； used to

    C. used to；is used to

    D. used to； used to

    查看答案和解析>>

    科目：初中英语 来源：湖南娄底市2019届九年级中考模拟（一）英语试卷 题型：补全短文5选5

    第三节 阅读短文，根据短文内容，从短文后的A、B、C、D、E五个选项中选出能填入空白处的最佳选项。每个选项只能用一次。

    Should friends be different or the same? Different people have different ideas. 1..

    2.. I am outgoing. I like to have friends who are similar to me. Both my best friend Linda and I like traveling. We went to Italy with our families last summer vacation. We stayed there for two weeks.3..

    My name is Mary. I like to have friends who are different from me. 4.. I am quiet and I like reading very much. Betty likes sports and she plays ping-pong well.

    I’m Peter. I like to have friends who are like me. It can be very helpful. 5.and my good friend Rick is quiet, too. Sometimes I don’t know what to do with my problems and he can tell me what I should do.

    I’m Bill. I have both kinds of friends. I think it is important. That makes my life more interesting.

    A. I’m a little quiet

    B. My name is Susan

    C. Next year we want to go to Paris

    D. The following is what four of my classmates say

    E. My best friend Betty is shorter and more outgoing than me

    A. I’m a little quiet

    B. My name is Susan

    C. Next year we want to go to Paris

    D. The following is what four of my classmates say

    E. My best friend Betty is shorter and more outgoing than me

    查看答案和解析>>

    科目：初中英语 来源：山东省2019届九年级人教版第二学期第一次摸底考试英语试卷 题型：回答问题

    阅读表达

    As we all know, a healthy body is the most important wealth you have. Healthy people live a pleasant life and have more chances to succeed in their jobs. So everyone wants to lead a healthy life. And I suggest you do it step by step.

    Get rid of your bad habits. For example, staying up too late in the evening is harmful to your health. What is even worse, some people prefer smoking and drinking a lot in their daily life. All these bad habits are poison to your health. You have to change yourself if you want to live healthily. This is the beginning of your journey towards a healthy life. However, it might be hard for you to make a successful start.

    Make a plan and develop good habits. Once you have got rid of the bad habits, set a goal for yourself to form good living habits. For example, you can begin with doing some light exercises a few times a week or walking a mile after dinner. You can also join in other activities like playing ball games or going swimming regularly. Even if you can’t feel yourself getting stronger immediately, you’re developing habits that will help you on your journey towards getting fit.

    Carry on your plan. The good habits you develop are very important to learning how to live a healthy lifestyle. So keep doing it with small steps. Cut one or two unhealthy things from your diet, or add some exercise to your daily training. The longer you do it, the better result you will get. Remember:

    Rome was not built in just one day!

    1.What people can have more chances to get success in their jobs?

    ________________________________________________

    2.How many suggestions are mentioned in this passage?

    ________________________________________________

    3.Is staying up too late in the evening harmful to your health?

    ________________________________________________

    4.Try to put the underlined sentence into Chinese.

    ________________________________________________

    5.Give a proper title to the passage.

    ________________________________________________

    查看答案和解析>>

    科目：初中英语 来源：云南省曲靖市2018届九年级中考英语试卷 题型：阅读单选

    One night, four naughty(顽皮的)boy students stayed out of school having a late party at a night club and having a great time. They were partying so happily that they forgot they were going to take an exam the next day.

    The next morning, they got up too late to take their exam. In order not to be punished, they thought of a plan which they believed was perfect. They made their clothes dirty and went to the teacher’s office.

    “ Mr. Johnson, we went to a friend’s house last night in another town. On the way back, our car got a flat tire(爆胎), so we had to push the car all the way back to school. That’s why we didn’t make it for the exam.”

    The teacher listened to their story, and told them in a kind voice, “It doesn’t matter. I am going to give you another chance to take the test three days later.” The four students thanked him and left happily.

    The test day arrived in the end. The teacher asked them, “I am going to put each one of you in a different room for the test. Are you OK with that?

    “OK”, the students were fine with that because they had all studied hard. Then they got the test paper. It had only two questions.

    Test Paper(100 points)

    ?Your name: (1 point)

    ?Which tire burst(轮胎爆裂)? （99 points）

    A. Front left B. Back left

    C.Front right D. Back right

    Test Paper(100 points)

    ?Your name: (1 point)

    ?Which tire burst(轮胎爆裂)? （99 points）

    A. Front left B. Back left

    C.Front right D. Back right

    1.Why didn’t the students take the exam?

    A. Because their car had a flat tire.

    B. Because they stayed up too late the night before.

    C. Because the teacher didn’t want them to.

    D. Because their clothes were too dirty.

    2.What did the teacher do after listening to their story?

    A. He believed them by giving them a second chance.

    B. He didn’t do anything about it.

    C. He used a different way to tell if they were lying.

    D. He was very angry.

    3.Which of the following statements is TRUE?

    A. They remembered the exam the next day.

    B. Their car was broken on the way back to school.

    C. They has a great time taking the exam.

    D. They took the second test seriously.

    4.According to the passage, we can learn that .

    A. the teacher had no doubt about what the students said

    B. the students were very clever

    C. the students told a terrible lie

    D. the students didn’t tell a lie

    5.What do you think of the teacher?

    A. Wise. B. Stupid. C. Hard-working. D. Unhealthy.

    查看答案和解析>>

    科目：初中英语 来源：云南省曲靖市2018届九年级中考英语试卷 题型：单选题

    Nowadays China for its new “four great inventions”－shared bicycles, electronic payments, high-speed railways and online shopping.

    A. was knowing B. was known C. is knowing D. is known

    查看答案和解析>>

    科目：初中英语 来源：安徽省芜湖市区2017-2018学年七年级第二学期期中英语试卷 题型：阅读单选

    Big Ben is not the name of a man. It is the name of a big clock in London. London is the capital of England. This clock has four faces. So, no matter (无论) where you stand, you can read the time on the face of Big Ben. Each face is the size of a bus. The hands are about four meters long. It is about the size of two people standing on top of each other. If you go to London, you may want to visit the Houses of Parliament (国会大厦). In that place you will find Big Ben sits at the top of the clock tower in the Houses of Parliament. You will probably hear it and see it. The big clock makes such a loud noise. ‘Ding dong, ding dong.’ It goes every quarter of an hour. The name of Big Ben comes from a big builder.

    1.Big Ben is in ____________.

    A. China B. the USA C. Japan D. the UK

    2.The clock strikes (敲) every ________ minutes of an hour

    A. ten B. fifteen C. thirty D. forty-five

    3.You can read the time of Big Ben ____________.

    A. at the top of the clock tower B. in the Houses of Parliament

    C. on the hands of the huge clock D. on the four faces of the clock

    4.The underlined (划线部分) word ‘hands’ means ________ in Chinese.

    A. 手 B. 标志 C. 指针 D. 发条

    查看答案和解析>>

    科目：初中英语 来源：四川省内江市、内江外国语学校2019届九年级下学期月考英语试卷 题型：单选题

    Of all the ________, he is the most popular one.

    A. men singers B. man singers C. men singer D. man singer

    查看答案和解析>>

    同步练习册答案