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职称英语理工类阅读判断模拟试卷4

2009-06-24来源:

  练习:
   1. The Sun’s gravity is too weak to keep its plasma from flowing to the Earth.
   A Right B Wrong C Not mentioned
   2. The Earth is quite safe with a magnetic field surrounding it to protect it from the attack by the solar wind.
   A Right B Wrong C Not mentioned
   3. Some scientists are worrying about the possible disappearance of the Earth’s protective magnetic field in the future.
   A.Right B Wrong C Not mentioned
   4. The auroras are formed when the electrons falling into the Earth’s atmosphere at the poles and colliding with gas molecules in the atmosphere.
   A.Right B Wrong C Not mentioned
   5. You cannot see the Northern Lights unless you are in Alaska or Canada.
   A Right B Wrong C Not mentioned
   6. Tens of thousands of tourists take special trips to Norway and Sweden every year to watch the Northern Lights.
   A Right B Wrong C Not mentioned
   7. An aurora is generally close to the ground and is very long and thick.
   A.Right B Wrong C Not mentioned
  答案与题解:
   1. B 题句的意思是:太阳的重力太弱,等离子逃离太阳,流向地球。这一说法与短文第一段第一、二句表达的内容不符。句子表达的重点不是太阳的重力太弱,而是太阳太热,其活动又太剧烈,造成等离子逃离太阳,流向地球。所以,答案是选项B。
   2. A 题句说地球相当安全,因为有磁场在高空包围着地球,将太阳风挡在地球大气层外面。题句表达的意思与短文第二段第一句传递的信息相符。虽然短文中没有用safe这个词,但是“don’t worry because a protective magnetic field surrounds our planet”包含了safe这层意思,所以选项A是答案。
   3. C 题句说,有些科学家担心包围地球起防护作用的磁场有一天会消失。短文中找不到这一信息,所以答案是C。
   4. A 短文第二、三段解释极光的成因。当强大的太阳风侵入地球磁场,磁场的磁力线会断开和闭合,等离子流的电子进入大气层,流向极地上空,与大气层的气体分子发生碰撞,发出极光。题句表达的意思与短文介绍的极光成因相符,所以答案是A。
   5. B 题句的说法明显与短文第三段的叙述不符。第四段介绍说,当在太阳风暴达到最高峰的期间,明亮的北极光甚至在位于极南面的佛罗里达州乃至墨西哥都能看到。所以答案是B。
   6. C 题句说,每年有几万游客专程前往挪威和瑞典观看北极光。短文中找不到这一内容所以答案是C。
   7. B 题句说极光通常很接近地面,又长又厚。这一说法有两点与短文第五段的介绍不符。第一点,极光不是接近地面,而是“似乎很接近地面(Auroras often seem to be very close to the ground)”,事实上,最靠近地面的极光离地面也有100公里。第二点,极光不厚,“only a few hundred meters thick”。所以答案是B。
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