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专家解题:2013年职称英语考试理工类B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
  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, A项How怎样,formed形成;B项made of组成;C项How怎样,named 命名;D项different types不同类型;E项proof证据,exist存在;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。
  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B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exist,所以,本题的答案为选项E。
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