The Sun’s gravity is too weak to keep its plasma from flowing to the Earth.

试卷相关题目

• 1Norman Blarney is an artist of deep <u>convictions</u>.

  A.statements

  B.beliefs

  C.suggestions

  D.claims

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• 2In thelatter case the <u>outcome </u>can be serious indeed.

  A.result

  B.judgment

  C.decision

  D.event

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• 3Even in a highly modernized country, <u>manual </u>work is still needed.

  A.physical

  B.mental

  C.natural

  D.hard

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• 4Can you <u>follow </u>the plot、

  A.change

  B.investigate

  C.write

  D.understand

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• 5The high-speed trains can have a major <u>impact </u>on travel preferences.

  A.force

  B.influence

  C.surprise

  D.power

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• 6The 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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• 7Some 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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• 8The 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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• 9You cannot sec the Northern Lights unless you are in Alaska or Canad

  A.A.Right

  B.Wrong

  C.Not mentioned

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• 10Tens 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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