练习册

  • 练习册
  • 试题
    宇宙飞船 10.keep a pet parrot 【查看更多】

     

    题目列表(包括答案和解析)

    阅读理解

    　　At the moment，it may be difficult to imagine，but many people believe that，by the year 2100，we will live on the planet(行星) Mars.Our own planet，Earth，is becoming more and more crowded and polluted.We should build a better world on Mars.

    　　First of all，transport should be better than they are today.Now it is difficult for spacecraft(宇宙飞船) to carry too large number of people to Mars梚t takes months.By 2100，travel to Mars will take a very short time in space shuttles that travel at half the speed(速度) of light.

    　　Humans need water，air and food to survive.Scientists should be able to develop the plants that can grow on Mars.These plants can provide the air and food that we need.However，the scientists are not sure whether these plants can provide water.

    　　Gravity(重力) will be the problem for the early settlers on Mars.The gravity on Mars will be about only three-eighth of the gravity on Earth.It is very dangerous for us because we can easily jump too high and float(漂浮) away into space.To prevent this，we have to wear special boots to make ourselves heavier.These boots will probably very popular and there will be many different designs for settlers to choose from.

    　　Life on Mars will be better than life on Earth in many ways.We will have more space.Living in a dome with 10 bedrooms is highly possible.Many people thought that robots will do most of our work and we will have more time for our

    hobbies.There will be no schools on Mars.Students will have a computer at home connecting to the inter-planet computer network.They can study，do homework and take exams in online schools.

    　　However，in some ways，life on Mars may be worse than life on Earth.For example，food will be not the same as they are today，it may be in the form of pills(药片).

    (1)

    Why do we need to move to another planet?

    　　A. Because the scientists are now quite interested in living on another planet.

    　　B.Because the students are having too much homework on Earth.

    　　C.Because there are a lot of aliens(外星人) on Mars.

    　　D.Because our own planet Earth is becoming more and more polluted and crowded.

    [　　]

    (2)

    What will be the problem for the early settlers on Mars?

    　　A.Food and water.　　B.Schools.

    　　C.Gravity.　　　　 D.both A and C

    [　　]

    (3)

    What can plants do on Mars?

    　　A.Plants can provide water and food for settlers.

    　　B.Plants can provide everything we need on Mars.

    　　C.Plants can provide us oxygen(氧气) and food that we need on Mars.

    　　D.Plants can give us a beautiful environment to live on Mars.

    [　　]

    (4)

    How do students get education on Mars?

    　　A.Students don't need to go to school or get education on Mars.

    　　B.Students can have lessons and take exams online.

    　　C.Students can go to a normal school like that on Earth.

    　　D.We don't know.

    [　　]

    (5)

    What do you think it is the best tide for the passage?

    　　A.Move to Mars　　B.Leaving Earth

    　　C.Another planet桵ars D.Transport to Mars

    [　　]

    查看答案和解析>>

    短文填空

    　　Your maths teacher may wear old-fashioned clothes and always pronounce your name wrongly．Your English teacher may love to start classes with tests．Perhaps it is hard f　　1　　 you to accept these．But they eat pizza, go to movies and enjoy sports at weekends, just like you．

    　　So how can you g　　2　　 along with your teachers? Here are some tips．

    　　F　　3　　,do the following things：Don't be late for school．H　　4　　 in your homework on time．Be polite to your teachers．

    　　Second, show an interest in the subject．Even if you are not g　　5　　 at your maths or English, you should do your b　　6　　 to learn it and show your teacher that you are a hardworking student．

    　　You can also come to your teacher during his/her spare time．Use this time to get some help or talk about your progress in class．You may be surprised to learn that your teacher is more relaxed in his/her free time t　　7　　 in his/her working hours．

    　　A good relationship with your teachers will help you now and in the f　　8　　．There may be some t　　9　　 you will always remember because they change you and your life．After f　　10　　 school, you may even go back to visit them．And they are always proud of that．

    查看答案和解析>>

    如图甲表示某生物膜结构，图中A、B、C、D、E、F表示某些物质，a、b、c、d表示物质跨膜运输方式。图乙和图丙表示物质运输曲线，请据图回答：


    （1）若图甲是癌细胞的细胞膜，则膜上含量较正常细胞减少的物质是[　　]　　　　。
    （2）若图甲是线粒体膜，b和c过程运输的气体分别是　　　　。b、c运输方式符合图　　　　所表示的物质运输曲线。
    （3）若图甲表示人体红细胞膜，则表示Na＋、K＋运输的分别是图中　　　　　　。Na＋、K＋的运输方式符合图　　　　所示曲线。
    （4）已知红细胞吸收葡萄糖是协助扩散，而有人认为小肠上皮细胞以主动运输的方式吸收葡萄糖，请设计实验加以确定。
    ①实验步骤：
    第一步：取甲、乙两组生理状况相同的小肠上皮细胞，放入适宜浓度的含有葡萄糖的培养液中。
    第二步：甲组细胞给予正常的呼吸条件，　　　　　　　　　。
    第三步：　　　　　　　　　　　　　　　　。
    ②预测实验结果并分析：
    a．若甲、乙两组细胞对葡萄糖的吸收速率基本相同，则　　　　　　　　　。
    b．                                。

    查看答案和解析>>

    根据中文意思完成句子
    　【小题1】 我喜欢北京的秋天，你呢？
    　　I like the autumn in Beijing, ____________ you?
    　【小题2】多吃蔬菜水果对健康有好处。
    　　____________ your health to eat more vegetables and fruit.
    　【小题3】你愿意参观我们的新学校吗？
    　　____________ to visit our new school?
    　【小题4】哥哥花了一个星期教我弹吉他。
    　　____________to play the guitar.
    　【小题5】妈妈常常告诉我，既不要炫耀自己，也不要轻视别人。
    　　Mom often ____________.

    查看答案和解析>>

    Monday morning is an important time at our school. All of the students go to the playground. We listen to music, and we   16   the national flag go up.

    　  Usually, one student gives a talk on Monday mornings. One Monday last year, a boy gave the talk. He was   17   and excited! When I saw him, I wanted to have a try, too.

    　  Can I really do it?

    　  Last week, our teacher said our class should give the talk. My teacher   18   me, “I know you want to have a try. Next Monday, you can give the talk. Go and write something down.   19  for it, I’m sure you’ll do well.”

        “Thank you,” I answered. It was such a great   20   for me! When I got home, I was excited. I wrote two pages for the talk. I read them again and again. When I read, I asked my parents  21 . I wanted to make my teacher happy.

    　  Monday morning came. I began to feel   22  . When did I last give a talk to   23   many people? Never! This was my first time. Could I really   24   it ? Maybe I couldn’t finish the talk.

        When I got to school, we all went out to playground. I  25  in front of everyone. I opened my mouth, but I couldn’t say anything.

        “Take it easy,” I said to   26  . “Don’t be nervous. You can do it.”

        Just then, I looked down at everyone. I saw about 1,000 eyes. They were all looking at me ! I couldn’t   27   stand up.

        I looked at their eyes more carefully. Their eyes were saying, “You can do it! Don’t be afraid, just talk!”

        I   28   a big breath. Then I began to talk. It wasn’t hard. It was easy.

        I don’t know   29   I finished my talk. But I did it. I felt so good that day. I showed myself  30  everyone what I can do.

    1.A. watch          B. see          C. notice       D. look at

    2.A. surprising     B. proud        C. amazed       D. careful

    3.A. told           B. asked for    C. said to      D. showed

    4.A. Look out       B. Come on      C. Take care    D. Get ready

    5.A. chance         B. news         C. time         D. message

    6.A. to listen to   B. to listen    C. listen to    D. listen

    7.A. excited            B. happy        C. nervous      D. surprised

    8.A. after          B. such         C. before       D. so

    9.A. do         B. speak            C. talk         D. take

    10.A. stand             B. stood        C. was standing D. have stood

    11.A. me            B. my class     C. myself           D. my parents

    12.A. be able to        B. hardly       C. ever         D. even

    13.A. took          B. held         C. put          D. left

    14.A. when          B. how          C. why          D. whether

    15.A. so                B. but          C. to           D. for

     

    查看答案和解析>>


    同步练习册答案