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

试卷相关题目

• 1Eta 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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• 2Some industrialized countries are unwilling to spend money in reducing pollution.

  A.Right

  B.Wrong

  C.Not mentioned

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• 3The 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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• 4The coral island nations of the Pacific have a long history of civilization.

  A.Right

  B.Wrong

  C.Not mentioned

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• 5Scientists are not sure how serious the effects of global warming will be.

  A.Right

  B.Wrong

  C.Not mentioned

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• 6Eta 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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• 7Astronomers 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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• 8Which 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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• 9According 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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• 10“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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