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2012职称英语考前每日一练[理工类B级-11月1日]

2011-11-03 09:45 来源:正保会计网校 打印 | 收藏 |
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  阅读判断(第1~7题,每题1分,共7分)

  下面的短文后列出了7个句子,请根据短文的内容对每个句子做出判断:如果该句提供的是正确信息,请选择A;如果该句提供的是错误信息,请选择B;如果该句的信息文中没有提及,请选择C.

  Black Holes

  Most scientists agree that black holes exist but are nearly impossible to locate. A black hole in the universe is not a solid object, like a planet, but it is shaped like a sphere (球体)。Astronomers(天文学家)think that at the center of a black hole there is a single point in space with infinite(无限的)density(稠密)。This single point is called a singularity (奇点)。If the singularity theory is correct, it means that when a massive star collapses, all the material in it disappears into the singularity. The center of a black hole would not really be a hole at all, but an infinitely dense point. Anything that crosses the black hole is pulled in by its great gravity.

  Although black holes do exist, they are difficult to observe. These are the reasons.

  ● No light or anything else comes out of black holes. As a result, they are invisible to a telescope.

  ● In astronomical terms, black holes are truly. For example, a black hole formed by the collapse of a giant star would have an event horizon(视界)only 18 miles across.

  ● The nearest black holes would be dozens of light years away from Earth. One light year is about 6 trillion(万亿)miles. Even the most powerful telescopes could not pick out an object so small at such a great distance.

  In 1994 the Hubble Space Telescope provided evidence that black holes exist. There are still answers to be found, however, so black holes remain one of the mysteries of the universe.

  1. Black holes are part of space.

  A. Right B.Wrong C. Not mentioned

  2. Black holes exist but are difficult to observe.

  A. Right B.Wrong C. Not mentioned

  3. The center of a black hole is empty.

  A. Right B. Wrong C. Not mentioned

  4. The attraction of two large stars leads to gravity.

  A. Right B.Wrong C. Not mentioned

  5. The sun is the heaviest star in the universe.

  A. Right B.Wrong C. Not mentioned

  6. The nearest black holes are hundreds of light years away from us.

  A. Right B.Wrong C. Not mentioned

  7. The Hubble Space Telescope helps scientists to understand the nature of the universe.

  A. Right B.Wrong C. Not mentioned

  同时按下ctrl+A键查看答案

  1A 2A 3B 4C 5C 6B 7A


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学员:chuhero 感谢周涵老师,职称英语过了。我觉得应该在这里跟老师说声谢谢,老师的讲课很实用,针对性强,是很有学习价值的课程,如果你想通过职称英语考试,就听周老师的课程吧。

学员:王仁芝 我去年7月开始差不多从零学起,坚持到考试,考了72分,十分感谢老师及网校的辅导!

学员:lilizhangx 职称英语通过了!毕业10年了,没怎么接触英语,跟着周涵老师学习,一次通过!

学员:张洪杰 首先感谢周涵老师,好多年没有学习了,经过老师的讲解顺利过关,这已经出乎我的预料,真的很激动,终于没让老师们失望,通过了,很高兴。

学员:xsqxxlxzj 十多年没有学习过英语了,通过职业培训教育网3个多月的学习,83分通过职称英语综合C级考试,非常感谢周涵老师,谢谢您!

学员:best888zhou 毕业以后就没有翻过英语了,丢了有七年了,虽然以前基础还不错,但这次真的是没有信心,过年后开始复习,用了差不多一个月的时间,B级综合考了80分,很开心,谢谢周涵老师的细致讲解!

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