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[问答] stating a limitation that helps determine a research methodology是什么意思? [复制链接]

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发表于 2011-8-27 15:54:14 |只看该作者 |倒序浏览
把所有选项都贴一下:
问题:In the second paragraph, the author is
primarily concerned with

A. staring a limitation that helps
determine a research methodology
B. making a comparative analysis of two
different research methodologies
C. assessing the amount of empirical
data in the field of physical science
D.suggesting an optimistic way of
viewing a widely feared phenomenon
E. describing a fundamental issue and
discussing its future impact on society


原文(很短,如果愿意看的话)
The Earth's magnetic field is generated
  as the molten iron of the Earth's outer
  core revolves around its solid inner
  core. When surges in the molten iron
(5) occur, magnetic tempests are created.
  At the Earth's surface, these tempests
  can be detected by changes in the
  strength of the Earth's magnetic field.
  For reasons not fully understood. the
(10) field itself reverses periodically
  every million years or so. During the
  past million years, for instance, the
  magnetic north pole has migrated
  between the Antarctic and the Arctic.
(15)  Clearly, geophysicists who seek to
  explain and forecast changes in the
  field must understand what happens in
  the outer core. Unlike meteorologists,
  however, they cannot rely on
(20) observations made in their own
  lifetimes. Whereas atmospheric storms
  arise in a matter of hours and last for
  days, magnetic tempests develop over
  decades and persist for centuries.
(25) Fortunately scientists have been
  recording changes in the Earth's
  magnetic field for more than 300 years.
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沙发
发表于 2011-8-27 16:04:44 |只看该作者
第二段开头,揭示了research的局限性,即they cannot rely on observations made in their own lifetimes.
第二段末尾,因而科学家调整出新的使用的方法,Fortunately scientists have recording changes in the Earth  magnetic field for more than 300 years.
选项的意思是阐述了一个实际局限,这个限制可以帮助科学家选择合适的研究方法。
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RE: stating a limitation that helps determine a research methodology是什么意思? [修改]
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stating a limitation that helps determine a research methodology是什么意思?
https://bbs.gter.net/thread-1299666-1-1.html
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