解读GRE阅读句子作用题
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解读GRE阅读句子作用题
Human impacts on the natural environment during the later part of the Holocene (beginning about 4,000 years ago) complicate investigations into environmental change during that period becau the signals produced by human- and climate-induced change are sometimes difficult to parate. For example, in the later Holocene, one indicator of incread aridity due to climate change is an increa in pollen from grass, as forest vegetation gives way to grassland. Such a change in vegetation could alternatively be attributed to human impact in the form of agricultural development. Examples of such human impact from 4,000 years ago would be small-scale, however, since the broad ecosystem changes brought about by the widespread adoption of agricultural technologies occurred later.
长舌
适合三人玩的室内游戏>想念的图片
Which of the following best describes the function of the highlighted ntence in the context of the passage as a whole?
A. It provides an example of the kind of problems that often complicate investigations into environmental change.
B. It call into question the reliability of the established dates for later Holocene agricultural development.
C. It describes the nature of localized agricultural developments during the later Holocene.
D. It outlines a hypothesis that draws on evidence discusd earlier in the passage.
E. It limits the scope of a particular complication mentioned earlier in the passage.
题目形式非常固定，高亮文中的某一个句子，询问在文章中整体充当什么功能或者作用;
我们理一下这篇短文章：
第一句：作者提出自己观点：人类影响因素使得对4000年前开始，环境变化的调查研究复杂化(complicate into)，因为人类和气候诱发的环境变化的signal经常难以区分开
第二句：作者举例支持自己观点：森林植被变成草地，使得植物花粉增加，既可以理解为自然气候越来越干燥，也可以归因于人类农业发展的影响
第三句：然而，这种4000年前人类影响的例子是比较少的哦(small-scale),因为广泛采用农业技术导致的环境变化后来才大规模的发生(changes occurred later)
亚历山大三世虽然有However这个词，但是作者并不是在否定自己的观点和例子，而是想表达：他所指出的人类因素和气候因素难以区分的例子，在4000年前比较少，并不是他的观点有误，而是那时候农业技术还不普遍，所以人类因素complicates调查研究的例子少。
A选项，应该是第二句话的作用!
B选项，call into question，表示反驳，错!
C选项，描述农业发展的特点，无关选项
D选项，概述一个假说，这不是一个假说
E选项，正确限定了文章第二句指出的一个particular complication的scope;即small-scale.为什么要用particular complication这个词呢?particular表示具体的，因为第一句话是综述观点，第二句话是例子，所以是一个具体的complication
大家做对了吗?再看一道新鲜鸡精：
When studying shrimp feeding from hydro-thermal vents at the bottom of the ocean, biologists were surprid that the shrimps’ reproductive cycles followed asonal patterns. Far beyond the reach of sunlight, and with food abundant around the vents all year round, why should such animals reproduce asonally? The answer might involve their offspring, which in their larval form drift in the currents to colonize new vents. The larvae must feed during their trip, and their spring time relea coincides with a peak in algae raining down from surface waters. So far,
rearchers have found no evidence of asonal breeding among vent-dwelling species t
hat provide their offspring with yolk to sustain them or among vent-dwelling species found in areas of the ocean with not asonal algae blooms.
Which of the following best describes the function of the highlighted ntence?
A. It casts doubt on the accuracy of earlier obrvations of asonal breeding among shrimp species living near hydro-thermal vents.
B. It undermines the explanation propod for asonal breeding among some shrimp species living near hydro-thermal vents.
C. It suggests that alternative theories are needed to explain asonal breeding among shrimp species living near hydro-thermal vents.
D. It describes the survival benefits to shrimp of mating in parts of the ocean where algae blooms rain down abundantly.
E. It supports the explanation proffered for the asonal breeding obrved among some shrimp species living near hydro-thermal vents.
这题答案是最后一个~大家选对了吗~
GRE阅读和新托福阅读中的句子作用题
GRE阅读中的句子作用题解题思路分析：首先通过题干中定位词找到句子所在位置，比如上文题目中提到的两个人名就是定位词，然后我们要做的就是分析所问对象指向的逻辑上一层主题，也就是这句话在文章当中的作用或者说功能，如问到例子的作用，答案往前找论点，答案常有 illustrate 或 give an example of。按一般规律来说，答案多往前找，偶尔也在后文。
属虎的是什么命
技巧
王小飞逻辑上一层
句子成分 → 句子主干
句子 → 论
观点 → 主题
结论 → 主题
Although pasnger pigeons, now extinct, were abundant in eighteenth-and nineteenth-century America, archaeological studies at twelfth-century Cahokian sites in the prent-day United States examined houhold food trash and found that traces of pasnger pigeon were quite rare. Given that the sites were clo to a huge pasnger pigeon roost documented by John James Audubon in the nineteenth century and that Cahokians consumed almost every other animal protein source available, the archaeologist conducting the studies concluded the pasnger pigeon population had once been very limited before increasing dramatically in post-Columbian America. Other archaeologists have criticized tho conclusions on the grounds that pasnger pigeon bones would not be likely to be prerved. But all the archaeological projects found plenty of bird bones–and even some tiny bones from fish. (来自网络提供的真题回忆05年3月15日考题)
