Eta Carinae is now engaging in

试卷相关题目

• 1Some industrialized countries are unwilling to spend money in reducing pollution.

  A.Right

  B.Wrong

  C.Not mentioned

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• 2The people of the coral island nations are unable to do anything substantial about the problem of global warming.

  A.Right

  B.Wrong

  C.Not mentioned

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• 3The coral island nations of the Pacific have a long history of civilization.

  A.Right

  B.Wrong

  C.Not mentioned

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• 4Scientists are not sure how serious the effects of global warming will be.

  A.Right

  B.Wrong

  C.Not mentioned

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• 5The heat released by burning oil and coal is the direct cause of global warming.

  A.Right

  B.Wrong

  C.Not mentioned

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• 6The word “period” in Paragraph 3 means the length of time

  A.over which star vary in brightness

  B.for which Eta carinae’s brightening lasts.

  C.Eta carinae takes to become a supernova.

  D.it takes the laser from Eta carinae to travel to the earth.

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• 7Eta Carinae is hard to observe because

  A.it is too far away.

  B.there is too much dust and gas around it.

  C.the binoculars are not powerful enough.

  D.it does not send out infrared light.

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• 8Astronomers are particularly interested in Eta Carinae because

  A.it is in its final stage.

  B.it is a supernova.

  C.it exploded in 1987.

  D.it is brighter than the sun.

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• 9Which of the following statements about Eta Carinae is NOT true、

  A.It will end up as a supernova.

  B.It can be seen only through binoculars.

  C.It is the only star that sends out an ultraviolet laser.

  D.Its ultraviolet laser is brighter than that of the Sun.

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• 10According to the passage, which of the following has changed the most in the last 500 years、

  A.Food

  B.Clothing

  C.Ideology.

  D.Languag

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