Eta Carinae is hard to observe because

试卷相关题目

• 1The 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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• 2Eta Carinae is now engaging in

  A.some very common behaviour

  B.some very dull behaviour

  C.some very frightening behaviour.

  D.some very strange behaviour

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• 3Some industrialized countries are unwilling to spend money in reducing pollution.

  A.Right

  B.Wrong

  C.Not mentioned

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• 4The 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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• 5The coral island nations of the Pacific have a long history of civilization.

  A.Right

  B.Wrong

  C.Not mentioned

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• 6Astronomers 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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• 7Which 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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• 8According 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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• 9“Some” in the last sentence of the first paragraph refers to

  A.some cocoa trees.

  B.some chocolate drinks.

  C.some shops.

  D.some south american indians.

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• 10Thousands of Irish people starved during the “Potato Famine” because

  A.they were so dependent on potatoes that they refused to eat anything else.

  B.they were forced to leave their homeland and move to america.

  C.the weather conditions in ireland were not suitable for growing potatoes.

  D.the potato harvest was bad.

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