2012年11月03日的雅思机经已经出炉了，楷维留学指南小编与备考雅思的同学们一起分享!以下是阅读机经部分，希望对大家有所帮助!

　　Reading Passage 1

　　Title:

　　The dinosaurs footprints and extinction

　　Question types:

　　YES/NO/NOT GIVEN, Summary

　　文章内容回顾

　　文章从恐龙的脚印开始讲恐龙的灭绝。

　　英文原文阅读

　　Mass Extinctions

　　Cases in which many species become extinct within a geologically short interval of time are called mass extinctions. There was one such event at the end of the Cretaceous period (around 70 million years ago). There was another, even larger, mass extinction at the end of the Permian period (around 250 million years ago). The Permian event has attracted much less attention than other mass extinctions because mostly unfamiliar species perished at that time.

　　The fossil record shows at least five mass extinctions in which many families of marine organisms died out. The rates of extinction happening today are as great as the rates during these mass extinctions. Many scientists have therefore concluded that a sixth great mass extinction is currently in progress.

　　What could cause such high rates of extinction? There are several hypotheses, including warming or cooling of Earth, changes in seasonal fluctuations or ocean currents, and changing positions of the continents. Biological hypotheses include ecological changes brought about by the evolution of cooperation between insects and flowering plants or of bottom-feeding predators in the oceans. Some of the proposed mechanisms required a very brief period during which all extinctions suddenly took place; other mechanisms would be more likely to have taken place more gradually, over an extended period, or at different times on different continents. Some hypotheses fail to account for simultaneous extinctions on land and in the seas. Each mass extinction may have had a different cause. Evidence points to hunting by humans and habitat destruction as the likely causes for the current mass extinction.

　　American paleontologists David Raup and John Sepkoski, who have studied extinction rates in a number of fossil groups, suggest that episodes of increased extinction have recurred periodically, approximately every 26 million years since the mid-Cretaceous period. The late Cretaceous extinction of the dinosaurs and am monoids was just one of the more drastic in a whole series of such recurrent extinction episodes. The possibility that mass extinctions may recur periodically has given rise to such hypotheses as that of a companion star with a long-period orbit deflecting other bodies from their normal orbits, making some of them fall to Earth as meteors and causing widespread devastation upon impact.

　　Of the various hypotheses attempting to account for the late Cretaceous extinctions, the one that has attracted the most attention in recent years is the asteroid-impact hypothesis first suggested by Luis and Walter Alvarez. According to this hypothesis, Earth collided with an asteroid with an estimated diameter of 10 kilometers, or with several asteroids, the combined mass of which was comparable. The force of collision spewed large amounts of debris into the atmosphere, darkening the skies for several years before the finer particles settled. The reduced level of photosynthesis led to a massive decline in plant life of all kinds, and this caused massive starvation first of herbivores and subsequently of carnivores. The mass extinction would have occurred very suddenly under this hypothesis.

　　One interesting test of the Alvarez hypothesis is based on the presence of the rare-earth element iridium (Ir). Earth' s crust contains very little of this element, but most asteroids contain a lot more. Debris thrown into the atmosphere by an asteroid collision would presumably contain large amounts of iridium, and atmospheric currents would carry this material all over the globe. A search of sedimentary deposits that span the boundary between the Cretaceous and Tertiary periods shows that there is a dramatic increase in the abundance of iridium briefly and precisely at this boundary. This iridium anomaly offers strong support for the Alvarez hypothesis even though no asteroid itself has ever been recovered.

　　An asteroid of this size would be expected to leave an immense crater, even if the asteroid itself was disintegrated by the impact. The intense heat of the impact would produce heat-shocked quartz in many types of rock. Also, large blocks thrown aside by the impact would form secondary craters surrounding the main crater. To date, several such secondary craters have been found along Mexico's Yucatan Peninsula, and heat-shocked quartz has been found both in Mexico and in Haiti. A location called Chicxulub, along the Yucatan coast, has been suggested as the primary impact site.

　　题型难度分析

　　文章有两个题型，难度一般，可参照平行阅读法。

　　题型技巧分析

　　判断题的解题关键在于题干中考点的把握，具体可以参见相关的论文。

　　Reading Passage 2

　　Title:

　　The Inspiration of Nature

　　Question types:

　　Heading, Summary, 人物观点Matching

　　文章内容回顾

　　大致意思是现代很多科技产物来源于对自然界中生物的研究和模仿，有点讲仿生学的感觉。文中的例子：沙漠beetle如何吸水，蜘蛛网等。

　　题型难度分析

　　此篇有三个题型，可以选择其中的两个题型(推荐summary和matching)进行平行阅读，heading题每个段落都有，那么在把每个段落的细节题处理完之后再处理相应的heading, 这样可以做到读一遍文章做出大部分题目。

　　题型技巧分析

　　heading题考查学生对段落大致含义的把握能力，虽然出题人可能希望我们好好的读懂全段，但是考生未必有这样的能力。我们可以根据一些特定的词语在段落中寻找主题句的出现位置：

　　1. 在段落开头有举例结构的地方往往说明该段的主题句在举例结构之前。

　　2. 在段落中间有比较明显的转折结构，那么转折后的内容有可能是段落的重点内容。

　　3. 在段末有表示结果的词语，那么该句句子有可能是段落的主题句。

　　常见的段落结构有：总分结构;对比结构;并列结构;分总结构。总分结构还是占大多数的。

　　Reading Passage 3

　　Title:

　　性格和人际的关系

　　Question types:

　　Heading, TRUE/FALSE/NOT GIVEN, Multiple Choice

　　文章内容回顾

　　workplace中四种人的性格和communication style

　　题型难度分析

　　paragraph A: Physical-肢体语言与性格

　　paragraph B: communication

　　paragraph C: summary of different types of personality

　　paragraph D: 乐观主义，比较喜欢变化跟挑战的人。

　　paragraph E: 循规蹈矩的人，不喜欢变化

　　paragraph F: 总为别人着想的人，不喜欢变化

　　paragraph G: 不记得了

　　paragraph H: multi-communication skills and personality help achieve business goal

　　然后是四道TRUE/FALSE/NOT GIVEN和一道选择题。

　　选择题也比较简单。

　　题型技巧分析

　　判断题，主要关注出题点的判断：1. 谓语动词和宾语;2. be动词和表语;3. 绝对化词;4. 比较关系;5. 因果关系;6. 数字关系;只要明确具体考题中涉及到哪一类，然后去文章中根据定位词比对即可。