Astronomers are particularly interested in Eta Carinae because

试卷相关题目

• 1Eta 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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• 2The 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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• 3Eta 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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• 4Some industrialized countries are unwilling to spend money in reducing pollution.

  A.Right

  B.Wrong

  C.Not mentioned

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• 5The 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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• 6Which 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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• 7According 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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• 8“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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• 9Thousands 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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• 10Which country is the largest coffee producer、

  A.Brazil.

  B.Colombia.

  C.Ethiopia.

  D.Egypt.

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