主旨题和态度题一般事相互的,在考查主旨题时,都会作者的一种态度问题,所以这里把这两中题型放在一起来介绍。
主旨题涉及的内容也有很多类:有针对文章内容的;有针对文章结构的;也有对作者的写作手法的。总体来说,判断整篇文章的结构类型,Topic Sentence, Structural Elements及作者态度是做主旨题的基础。结构类型相同的文章,尽管内容不尽相同,但是主旨题的答案却有相当程度的可比性。如全文论证一个观点型,新观点推翻旧观点型文章等。
二、GRE阅读主旨题提问方式
1. 针对文章的内容大意的提问
这是主旨题中最常见的一种提问方式,大约占主旨题出现率的70%左右。常见的提问方式:
The primary purpose of the passage is to
The author is primarily concerned with
The passage focuses primarily on which of the following
下面以一篇短阅读为例子来说明:
Because of its accuracy in outlining the Earths subsurface, the seismic-reflection method remains the most important tool in the search for petroleum reserves. In field practice, a subsurface is mapped by arranging a series of wave-train sources, such as small dynamite explosions, in a grid pattern. As each source is activated, it generates a wave train that moves downward at a speed determined uniquely by the rocks elastic characteristics. As rock interfaces are crossed, the elastic characteristics encountered generally change abruptly, which causes part of the energy to be reflected back to the surface, where it is recorded by seismic instruments. The seismic records must be processed to correct for positional differences between the source and the receiver, for unrelated wave trains, and for multiple reflections from the rock interfaces. Then the data acquired at each of the specific source locations are combined to generate a physical profile of the subsurface, which can eventually be used to select targets for drilling.
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