In order to support this argument, the writer gives the example that _______.

试卷相关题目

• 1Which of the following statements is NOT true、

  A.Even windmill’s action depends on the sun.

  B.The sun produces enormous energy for man to make use of.

  C.Some day man will be able to utilize 100% of the solar energy that gets to the earth.

  D.The sun produces different heating effects in different places.

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• 2The reason why all the solar energy falling on the earth can’t be utilized is that ______.

  A.only a very small part is available

  B.the sun is too distant from the earth

  C.it takes thousands of years for this energy to be stored up in coal and oil

  D.our scientific knowledge is not sufficient

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• 3How much energy given off by the sun reaches the earth、

  A.100% but indirectly.

  B.5%.

  C.50%.

  D.only a very tiny amount.

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• 4Which of the following does the story lead you to believe、

  A.Food for astronauts must be made in a special way.

  B.All meat on earth comes in bite-sized pieces.

  C.Astronauts will only eat cakes made from crambs.

  D.Astronauts have to go hungry in a spaceship.

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• 5The main idea of the whole story is that _______.

  A.there is more food and water in space than on earth

  B.eating and drinking in space is a special problem

  C.astronauts can never eat or drink in a spaceship

  D.there is no food or water in a spaceship

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• 6This passage centers mainly on ________.

  A.harnessing energy through chemistry

  B.our last source of power

  C.how water power is produced

  D.the amount of solar energy that can be utilized

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