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托福阅读推理题实例及解析(一)

来源:   2018-03-01 15:42:55   
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  托福阅读题型中,推理题是很多同学望而生畏的题目,因为该类题型对段落细节的理解和选项分析要求非常高。一方面,要短时间内处理原文里的细节和把握核心信息,另一方面又要对应选项里的长难句进行提炼,准确且迅速根据推理逻辑来判断正确选项。因此我们需要三个步骤来掌握解题思路:

  解题步骤:第一步审题,分析题干关键信息用以确定原文考点句。就一般规律而言,题干的关键词在原文中会出现一两处,并且邻近几句中出现。所以先分析和确定题干中的关键词,再迅速扫读原文确定出题句很重要。

  第二步定位,根据题干的关键词,在段落中扫读缩小出题范围,特别要留意语法结构负责的长难句,同学往往比较容易略读而跳过了关键词。对应要点,找到出题句,然后着重分析长难句。

  第三步核实,分析选项并确定正确选项。推理题的正确选项有两类特征,一是跟原文信息进行反推;二是从大范围推小范围,即分析原理句和举例句之间的关系。

  下面以TPO5第1篇文章MINERALS AND PLANTS为例,来分析下推理题的解题思路。

  TPO5-1

  It can be inferred from Paragraph6 that compared with standard practices for remediation of contaminated soils, phytoremediation

  A. does not allow for the use of the removed minerals for industrial purposes.

  B. can be faster to implement

  C. is equally friendly to the environment

  D. is less suitable for soils that need to be used within a short period of time.

  Only recently have investigators considered using these plants to clean up soil and waste sites that have been contaminated by toxic levels of heavy metals – an environmentally friendly approach known as phytoremediation. This scenario begins with the planting of hyper accumulating species in the target area, such as an abandoned mine or an irrigation pond contaminated by runoff. Toxic minerals would first be absorbed by roots but later relocated to the stem and leaves. A harvest of the shoots would remove the toxic compounds off site to be burned or composted to recover the metal for industrial uses. After several years of cultivation and harvest, the site would be restored at a cost much lower than the price of excavation and reburial, the standard practice for remediation of contaminated soils. For examples, in field trials, the plant alpine pennycress removed zinc and cadmium from soils near a zinc smelter, and Indian mustard, native to Pakistan and India, has been effective in reducing levels of selenium salts by 50 percent in contaminated soils.

  题目解析:

  ......

  点击下载:托福阅读推理题实例及解析(一)

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