What conclusion can we draw from the passage? A. Groundwater can be quickly replaced by other water once pumped out. B. Groundwater is very valuable. C. Groundwater has nothing to do with human beings. D. Groundwater travel in an unknown way. 1-4 BCCB (II) ★★★ Satellites are an important part of our ordinary lives.For example, the information for weather forecasts is sent by satellite.Some satellites have cameras which take photographs of the Earth to show how clouds are moving.Satellites are also used to connect our international phone calls. Computer connections of the World Wide Web and Internet also use satellites. Many of our TV programs come to US through satellites.Airplane pilots also sometimes use a satellite to help them find their exact location. We use satellites to send television pictures from one part of the world to another.They are usually 35.880 kilometers above the equator.Sometimes we can see a satellite in the sky and it seems to stay in the same place.This is because it is moving around the world at 11.000 kilometers an hour-exactly the same speed that the earth rotates.A satellite must orbit the Earth with its antennaefacing the earth.Sometimes, it moves away from its orbit.So there are little rockets on it which are used to put the satellite back in the right position.This usually happens about every five or six days. Space is not empty! Every week, more and more satellites are sent into space to orbit the Earth.A satellite usually works for about 10-12 years.Satellites which are broken are sometimes repaired by astronauts or sometimes brought back to Earth to be repaired.Often.very old or broken satellites are left in space to orbit the Earth for a very long time.This is very serious because some satellites use nuclear power and they can crash into each other. 查看更多

 

题目列表(包括答案和解析)

Water goes around and around Earth in a never ending journey called the water cycle(循环). The sun heats up lakes, oceans, and other wet places on Earth. When the water gets warm enough, it changes into vapour. Plants also give off lots of water vapour. Some of this water vapour cools off high in the sky and becomes clouds. Then it falls back to Earth in a new place as rain or snow. This cycle happens over and over again.
The ground can absorb water like a sponge (海绵). If you could see this groundwater, it wouldn’t look like a lake or river. The groundwater is mixed in with the rocks and sand that lie in layers(层) below Earth’s surface.
Groundwater moves along slowly. How slowly? Maybe 1.5 kilometres in one century. Some of this water has been underground for thousands of years. And once groundwater is pumpedout of the ground from a deep well(井) by people, it may take hundreds of years for another water to take its place

  1. 1.

    In which order does water go around Earth?
    a .Fall down as rain or snow. 
    b. Heated up by the sun on lakes, oceans and other wet places.
    c. Cool off high in the sky.
    d. Form clouds.
    e. Change into vapour

    1. A.
      dacbe
    2. B.
      becda
    3. C.
      caebd
    4. D.
      bceda
  2. 2.

    The groundwater seems to______.

    1. A.
      be just on the ground
    2. B.
      be pure water like that in a lake or river
    3. C.
      exist in rocks and sand
    4. D.
      flow along like rivers or streams
  3. 3.

    What conclusion(结论) can we draw from the passage?

    1. A.
      Groundwater can be quickly replaced by other water once pumped out
    2. B.
      Groundwater is very valuable
    3. C.
      Groundwater has nothing to do with human beings
    4. D.
      Groundwater travel in an unknown way

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  Water goes around and around Earth in a never ending journey called the water cycle(循环). The sun heats up lakes, oceans, and other wet places on Earth. When the water gets warm enough, it changes into vapour. Plants also give off lots of water vapour. Some of this water vapour cools off high in the sky and becomes clouds. Then it falls back to Earth in a new place as rain or snow. This cycle happens over and over again.

 The ground can absorb water like a sponge (海绵). If you could see this groundwater, it wouldn’t look like a lake or river. The groundwater is mixed in with the rocks and sand that lie in layers(层) below Earth’s surface.

 Groundwater moves along slowly. How slowly? Maybe 1.5 kilometres in one century. Some of this water has been underground for thousands of years. And once groundwater is pumped out of the ground from a deep well(井) by people, it may take hundreds of years for another water to take its place.

In which order does water go around Earth?

   a .Fall down as rain or snow.  b. Heated up by the sun on lakes, oceans and other wet places.

   c. Cool off high in the sky.     d.  Form clouds.     e.  Change into vapour.

   A. dacbe                B. becda           C. caebd          D. bceda

The groundwater seems to________.

   A. be just on the ground        B. be pure water like that in a lake or river

   C. exist in rocks and sand       D. flow along like rivers or streams

The underlined word “pumped” in the passage can be replaced by________.

   A. run                       B. pushed            C. drawn             D. picked

What conclusion(结论) can we draw from the passage?

   A. Groundwater can be quickly replaced by other water once pumped out.

   B. Groundwater is very valuable.

   C. Groundwater has nothing to do with human beings.        

   D. Groundwater travel in an unknown way.

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 Water goes around and around Earth in a never ending journey called the water cycle(循环). The sun heats up lakes, oceans, and other wet places on Earth. When the water gets warm enough, it changes into vapour. Plants also give off lots of water vapour. Some of this water vapour cools off high in the sky and becomes clouds. Then it falls back to Earth in a new place as rain or snow. This cycle happens over and over again.

The ground can absorb water like a sponge (海绵). If you could see this groundwater, it wouldn’t look like a lake or river. The groundwater is mixed in with the rocks and sand that lie in layers(层) below Earth’s surface.

Groundwater moves along slowly. How slowly? Maybe 1.5 kilometres in one century. Some of this water has been underground for thousands of years. And once groundwater is pumped out of the ground from a deep well(井) by people, it may take hundreds of years for another water to take its place.

1.In which order does water go around Earth?

a .Fall down as rain or snow.  b. Heated up by the sun on lakes, oceans and other wet places.

c. Cool off high in the sky.     d.  Form clouds.     e.  Change into vapour.

A.dacbe

B.becda

C.caebd

D.bceda

2.The groundwater seems to________.

A.be just on the ground

B.be pure water like that in a lake or river

C.exist in rocks and sand

D.flow along like rivers or streams

3.The underlined word “pumped” in the passage can be replaced by________.

A.run

B.pushed

C.drawn

D.picked

4.What conclusion(结论) can we draw from the passage?

A.Groundwater can be quickly replaced by other water once pumped out.

B.Groundwater is very valuable.

C.Groundwater has nothing to do with human beings.

D.Groundwater travel in an unknown way.

 

查看答案和解析>>

Water goes around and around Earth in a never ending journey called the water cycle(循环). The sun heats up lakes, oceans, and other wet places on Earth. When the water gets warm enough, it changes into vapour. Plants also give off lots of water vapour. Some of this water vapour cools off high in the sky and becomes clouds. Then it falls back to Earth in a new place as rain or snow. This cycle happens over and over again.
The ground can absorb water like a sponge (海绵). If you could see this groundwater, it wouldn’t look like a lake or river. The groundwater is mixed in with the rocks and sand that lie in layers(层) below Earth’s surface.
Groundwater moves along slowly. How slowly? Maybe 1.5 kilometres in one century. Some of this water has been underground for thousands of years. And once groundwater is pumped out of the ground from a deep well(井) by people, it may take hundreds of years for another water to take its place.
【小题1】In which order does water go around Earth?
a .Fall down as rain or snow.  b. Heated up by the sun on lakes, oceans and other wet places.
c. Cool off high in the sky.     d.  Form clouds.     e.  Change into vapour.

A.dacbeB.becdaC.caebdD.bceda
【小题2】The groundwater seems to________.
A.be just on the groundB.be pure water like that in a lake or river
C.exist in rocks and sandD.flow along like rivers or streams
【小题3】The underlined word “pumped” in the passage can be replaced by________.
A.runB.pushedC.drawnD.picked
【小题4】What conclusion(结论) can we draw from the passage?
A.Groundwater can be quickly replaced by other water once pumped out.
B.Groundwater is very valuable.
C.Groundwater has nothing to do with human beings.
D.Groundwater travel in an unknown way.

查看答案和解析>>

Water goes around and around Earth in a never ending journey called the water cycle(循环). The sun heats up lakes, oceans, and other wet places on Earth. When the water gets warm enough, it changes into vapour. Plants also give off lots of water vapour. Some of this water vapour cools off high in the sky and becomes clouds. Then it falls back to Earth in a new place as rain or snow. This cycle happens over and over again.

The ground can absorb water like a sponge (海绵). If you could see this groundwater, it wouldn’t look like a lake or river. The groundwater is mixed in with the rocks and sand that lie in layers(层) below Earth’s surface.

Groundwater moves along slowly. How slowly? Maybe 1.5 kilometres in one century. Some of this water has been underground for thousands of years. And once groundwater is pumpedout of the ground from a deep well(井) by people, it may take hundreds of years for another water to take its place.

1.In which order does water go around Earth?

a .Fall down as rain or snow. 

b. Heated up by the sun on lakes, oceans and other wet places.

c. Cool off high in the sky.

d. Form clouds.

e. Change into vapour.

A.dacbe            B.becda            C.caebd            D.bceda

2.The groundwater seems to________.

A.be just on the ground                    B.be pure water like that in a lake or river

C.exist in rocks and sand                   D.flow along like rivers or streams

3.What conclusion(结论) can we draw from the passage?

A.Groundwater can be quickly replaced by other water once pumped out.

B.Groundwater is very valuable.

C.Groundwater has nothing to do with human beings.

D.Groundwater travel in an unknown way.

 

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