The Hubble Space Telescope helps scientists to understand the nature of the universe.

试卷相关题目

• 1The nearest black holes are hundreds of light years away from us.

  A.Right

  B.Wrong

  C.Not mentioned

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• 2The sun is the heaviest star in the universe.

  A.Right

  B.Wrong

  C.Not mentioned

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• 3The attraction of two large stars leads to gravity.

  A.Right

  B.Wrong

  C.Not mentioned

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• 4The center of a black hole is empty.

  A.Right

  B.Wrong

  C.Not mentioned

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• 5Black holes exist but are difficult to observe.

  A.Right

  B.Wrong

  C.Not mentioned

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• 6According to the passage,which of the following is the most polluting energy resource、

  A.Petroleum.

  B.Coal.

  C.Natural gas

  D.Water.

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• 7China’s Three Gorges Dam

  A.is the first hydroelectric dam in the world.

  B.is of the same size as the US’s Hoover Dam.

  C.can generate around 3% of world electricity.

  D.is the largest hydroelectric dam in the world.

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• 8Which country took the lead in making use of tidal currents to produce power in 2003、

  A.The UK.

  B.China.

  C.Norway.

  D.The US.

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• 9One of the problems with wind farms is that

  A.there is not enough wind.

  B.wind is not reliable.

  C.they can only be built on the sea.

  D.B.wind is not reliabl

  E.C.they can only be built on the sea.D.they might influence the world economy.

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• 10According to the passage,resources like wind are

  A.renewable.

  B.recyclable.

  C.damaging.

  D.scarc

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