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专家解题:2013年职称英语考试理工类A级概括大意与完成句子真题及答案解析1

来源:博大考神职称考试网 发布时间:2014-08-28
  考题类型:概括大意与完成句子
  下面的短文后有2项测试任务:(1)第23~26题要求从所给的6个选项中为指定段落每段选择1个小标题;(2)第27~30题要求从所给的6个选项中为每个句子确定一个最佳选项。
  Black Holes
  1    Black holes can be best described as a sort of vacuum,sucking up everything in space. Scientists have discovered that black holes come from an explosion of huge stars. Stars that are near death can no longer burn due to loss of fuel,and because its temperature can no longer control the gravitational(重力的)force,hydrogen ends up putting pressure onto the star's surface until it suddenly explodes then collapses.
  2    Black holes come from stars that are made of hydrogen,other gases and a few metals. When these explode it can turn into a stellar-mass(恒星质量)black hole,which can only occur if the star is large enough(should be bigger than the sun)for the explosion to break it into pieces,and the gravity starts to compact every piece into the tiniest particle. Try to see and compare:if a star that's ten times the size of the sun end up being a black hole that's no longer than 70 kilometers,then the Earth would become black hole that's only a fraction of an inch!
  3    Objects that get sucked in a black hole will always remain there,never to break free. But remember that black holes can only gobble up(吞噬)objects within a specific distance to it. It's possible for a large star near the sun to become a black hole,but the sun will continue to stay in place. Orbits(轨道)do not change because the newly formed black hole contains exactly the same amount of mass as when it was a star,only this its mass is totally contracted that it can end up as no bigger than a state.
  4    So far,astronomers have figured out that black holes exist because of Albert Einstein's theory of relativity. In the end,through numerous studies,they have discovered that black holes truly exist. Since black holes trap light and do not give off light,it is not possible to detect black holes via a telescope. But astronomers continue to explore galaxies(银河系),space and the solar system to understand how black holes. It is possible that black holes can exist for millions of years,and later contribute further process in galaxies,which can eventually lead to creation of new entities. Scientists also credit black holes as helpful in learning how galaxies began to form.
  23. Paragraph 1______
  A. How are black holes formed?
  B. What are black holes made of?
  C. How were black holes named?
  D. What are different types of black holes?
  E. Is there proof that black holes really exist?
  F. What happens to the objects around a black hole?
  专家解析:
  第一步:首先划出A-F选项的信息词, B项made of组成;B项proof证据,exist存在;C项How怎样,named命名;A项How怎样,formed形成;D项different types不同类型;F项happens发生,objects around周围的物体。
  第二步:找出段落的中心句。本段的中心句在第二句。Scientists have discovered that black holes come from an explosion of huge stars. 讲的是black holes是由an explosion of huge stars形成的(come from)。六个选项中,只有选项A的formed和原文的come from是同一个意思,即形成、产生的意思,所以,本题的答案为选项A。
  24. Paragraph 2______
  A. How are black holes formed?
  B. What are black holes made of?
  C. How were black holes named?
  D. What are different types of black holes?
  E. Is there proof that black holes really exist?
  F. What happens to the objects around a black hole?
  专家解析:
  第一步:找出段落的中心句。本段的中心句在第一句,即:Black holes come from stars that are made of hydrogen,other gases and a few metals.说的是:形成(come from)black holes的star是由hydrogen,other gases and a few metals组成的(made of),也就是选项E所说的What are black holes made of(black holes是由什么组成的)。故本题的答案为选项B。
  25. Paragraph 3______
  A. How are black holes formed?
  B. What are black holes made of?
  C. How were black holes named?
  D. What are different types of black holes?
  E. Is there proof that black holes really exist?
  F. What happens to the objects around a black hole?
  专家解析:
  第一步:找出段落的中心句。本段的中心句在第一句,即:Objects that get sucked in a black hole will always remain there, never to break free. 选择中只有F选项出现中心句的关键词objects,所以,本题的答案为选项F 。
  26. Paragraph 4______
  A. How are black holes formed?
  B. What are black holes made of?
  C. How were black holes named?
  D. What are different types of black holes?
  E. Is there proof that black holes really exist?
  F. What happens to the objects around a black hole?
  专家解析:
  第一步:找出段落的中心句。本段的中心句在第一句,即:So far,astronomers have figured out that black holes exist because of Albert Einstein's theory of relativity. 选项E出现了中心句的关键词exsit,所以,本题的答案为选项E。

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