An aurora is generally close to the ground and is very long and thick.

试卷相关题目

• 1Tens of thousands of tourists take special trips to Norway and Sweden every year to watch the Northern Lights.

  A.Right

  B.Wrong

  C.Not mentioned

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• 2You cannot sec the Northern Lights unless you are in Alaska or Canad

  A.A.Right

  B.Wrong

  C.Not mentioned

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• 3The auroras are formed when the electrons falling into the Earth’s atmosphere at the poles and colliding with gas molecules in the atmosphere.

  A.Right

  B.Wrong

  C.Not mentioned

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• 4Some scientists are worrying about the possible disappearance of the Earth’s protective magnetic field in the future.

  A.Right

  B.Wrong

  C.Not mentioned

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• 5The Earth is quite safe with a magnetic field surrounding it to protect it from the attack by the solar wind.

  A.Right

  B.Wrong

  C.Not mentioned

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• 6What is so special about WISE、

  A.It is small in size but carries a large camera.

  B.It is as small as a trashcan.

  C.Its digital camera can help astronomers to see the unknown space.

  D.Never before has a telescope carried a digital camera in spac

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• 7Which is NOT the synonym for the word "snap" in the third paragraph、

  A.make.

  B.shoot.

  C.take

  D.photograph.

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• 8The camera on WISE _____

  A.is no different from an ordinary camera.

  B.does not see infrared radiation while the ordinary camera does.

  C.catches the infrared radiation while the ordinary camera does not.

  D.reflects light that human eyes can se

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• 9Which of the following is NOT correct about “asteroids” according to paragraph 7、

  A.Asteroids float through space giving off visible light.

  B.Asteroids do not reflect light that reaches them.

  C.It is difficult to take asteroids’ pictures by ordinary cameras.

  D.The WISE telescope can take pictures of asteroids

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• 10What is implied in the last paragraph、

  A.Brown dwarfs give off visible light.

  B.Brown dwarfs give off infrared radiation.

  C.Brown dwarfs are power stars like the sun.

  D.Brown dwarfs are impossible to see with the WISE telescop

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