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

试卷相关题目

• 1How 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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• 2Which 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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• 3The 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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• 4Why can’t astronauts drink water from cups、

  A.The water would come from the open cups.

  B.The water would spill all over their food.

  C.Crambs would float in the cups.

  D.The cups would float in the air.

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• 5The story does not say this, but from what we have read, we can tell that ______.

  A.you get much hungrier in space than you do

  B.you can’t have water to drink in a spaceship

  C.astronauts must learn many new and different things

  D.you can’t eat anything in a spaceship

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• 6Which 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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• 7In order to support this argument, the writer gives the example that _______.

  A.a machine using solar energy efficiently has already been developed

  B.the sun is our final source of power

  C.man uses only a tiny part of the sun’s energy

  D.the part of the sun’s energy we use is used indirectly

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• 8This 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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