练习册

  • 练习册
  • 试题
    宇宙飞船绕地球飞行了十四圈.并到了一个海拔343公里的高度. The the Earth 14 and an of 343 【查看更多】

     

    题目列表(包括答案和解析)

    根据汉语完成句子

    他太空之行之后返回地球。

    He ________　________ Earth after ________　________　________ space．

    查看答案和解析>>

    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>>

    　　阅读理解

    　　 　　It takes more than three days to go from the earth to the moon by spaceship（宇宙飞船）. There is no air or water on the moon. There it's hot in the day and very cold at night. So no one can live there.

    　　 　　The moon turns around the earth. The earth turns around the sun. When moon comes between the sun and the eanth, this is called 　　 （称为）an eclipse（日蚀）.The moon, the sun and the earth are in the same line.（直线）

    　　 1. There is not any water or air on the moon.

    　　 2. Nobody can live on the moon.

    　　 3. The moon turns around the sun and the earth turns around the sun, too.

    　　 4. When the moon is between the sun and the earth, we called it eclipse.

    　　 5. The moon is always in the same line with the sun and the earth.

    查看答案和解析>>

    阅读理解：

    　　　　Do you know something about the moon? You can see it at night.Sometimes it looks round and bright. It also looks quite near. But 　　it's far away from the earth. If you take a spaceship（宇宙飞船）,you will get there in more than three days. The spaceship flies at 　　11 kilometres（公里）a second. In 1969 two Americans landed on（登上）the moon by spaceship.

    　　　　There are no living things on the moon because there is no air or water there. You can jump much higher there than on the earth.Some day we Chinese will get to the moon, too.

    根据短文内容，选择最恰当的答案。

    　　1. The moon looks ______.　　　　　　　　　　

    [　　]

    　　A. near　　B. far　　C. dark　　D. small

    　　2. How long will it take you to fly to the moon by spaceship?

    　　　　　　　　　　　　　　　　　　　　　　　　

    [　　]

    　　A. Five days.　　　　　B. Six days.

    　　C. Over three days.　　D. About two days.

    　　3. A: How fast can a spaceship fly?　　　　

    　　 B: It can fly ______ kilometres in a second.

    [　　]

    　　A. eleven　　B. fifteen　　C. nine　　D. five

    　　4. Two ______ astronauts（宇航员）landed on the moon in 1969.

    [　　]

    　　A. French　　B. American　　C. Germany　　D. British

    　　5. People can't live on the moon now because there is no ______there.

    [　　]

    　　A. food or drinks　　　　　B. living things

    　　C. people or houses　　　　D. air or water

    查看答案和解析>>

    Put 2 February in your diary! It is World Wetlands Day! It marks the date that the

    Convention(公约) on Wetlands was signed(签署)in1971.This special day was first celebrated in 1997 and it is celebrated every year.

    　 The celebration is a call for action. It is a way to show people how important and

    useful the wetlands are for people. On World Wetlands Day, people around the world take

    part in many wetlands activities. People take trips to the local wetlands. There are talks

    about how important the wetlands are. People get together to clean up their local wetlands

    Children draw pictures to advertise the day. People also compete(比赛)in boat races.

    　 The World Wetlands Day is important! If there are no wetlands, there will be no water for anyone in the future. Wetlands help protect nature and resources(资源)like fresh water. Already, more than 10000 million people in the world do not have fresh water.

    　 Many people do not know how important the wetlands are. They can understand why an

    elephant or a tiger is important because they are big, beautiful animals. It is much harder for

    them to understand how important the animals in the wetlands are. These small animals,

    such as frogs and snails, play a very important part in keeping the balance of nature.

    　 All plants and animals are part of the food chain(链).If the small wetlands animals

    die, some animals in the food chain will have nothing to eat. They will also die. People

    need the wetlands to keep the balance of nature in the world. If we do not protect nature

    today，it will be gone tomorrow.

    46. What should you put in your diary?

    　 A. Some frogs.

    　 B. The date of World Wetlands Day.

    　 C. 1971

    　 D. Any special day.

    47. Where do people celebrate World Wetlands Day?

    　 A. All over the world.　　　　　　　　　　　 B. In ships

    　 C. At home.　　　　　　　　　　　　　　　 D. In their own way.

    48. Which of the following sentences is NOT true?

    　 A. People celebrate World Wetlands Day by taking part in competitions.

    　 B. People celebrate World Wetlands Day by taking hips to local wetlands.

    　 C. People celebrate World Wetlands Day by listening to talks about the wetlands.

    　 D. People celebrate World Wetlands Day by talking about the weather.

    49. Why are small animals important?

    　 A. They are part of the balance of nature and the food chain.

    　 B. They are beautiful.

    　 C. Bigger animals are eaten by them

    　 D. Without them, there may be no water.

    50. Which of the following might be the best title of the article?

    　 A. Wetlands Are Important

    　 B. Small Animals Are Also Important

    　 C. World Wetlands Day

    　 D. Food Chain

    查看答案和解析>>


    同步练习册答案