今天小编给大家带来的主要内容是2015年9月19日雅思阅读真题回忆。

　　Passage 1

　　题材：自然环境

　　题目：How deserts grow

　　题型：判断7+填空6

　　文章大意：

　　沙漠形成的原因，形式及其影响

　　参考答案：

　　1. "desertification"第一次是在DB(地点)使用的 NOT GIVEN

　　2. 沙漠化地区占地球表面20%. FALSE

　　3. 沙漠化形成把人们赶到了不适合耕种的地方TRUE

　　4. 多下雨会使土地肥沃NOT GIVEN

　　5. 由于沙漠化人口减少。FALSE

　　6. NOT GIVEN

　　7. 沙漠化现象在Africa地区要比别的地方严重。TRUE

　　8. 草的消失由animals造成

　　9. trees destroyed for erosion

　　10. more sunlight was back to the atmosphere.

　　11. evaporation 的量増加了

　　13. dust 和 smoke 形成了 Particles

　　(答案仅供参考)

　　Passage 2 ：

　　题材：动物类

　　题目：Australia Parrots

　　题型：匹配6+选择3+填空4

　　文章大意： Australia Parrots起源地由于环境的变迁以及现状

　　参考答案：

　　14. one example of one parrot species survive from the change of environment. D

　　15. F

　　16. G

　　17. J

　　18. C

　　19. H

　　20. parrot都分布在哪些地区？ C in the continent which split up.

　　21. 关于parrot beaks 哪一项是对的？ D

　　22、 nesting的确定是什么？ D

　　23. one-sixth in Australia

　　24. as early as 16th century

　　25. map maker cartographer

　　26. in 1865，……

　　(答案仅供参考)

　　Passage 3 ：

　　题材：科技类

　　题目：Multitasking

　　题型：单选5+匹配4+判断5

　　参考文章(非考试原文)：

　　Multitasking Debate

　　Can you do them at the same time？

　　Talking on the phone while driving isn't the only situation where we1 re worse at multitasking than we might like to think we are. New studies have identified a bottleneck in our brains that some say means we are fundamentally incapable of true multitasking If experimental findings reflect real-world performance， people who think they are multitasking are probably just underperforming in all — or at best， all but one - of their parallel pursuits. Practice might improve your performance， but you will never be as good as when focusing on one task at a time.

　　The problem， according to Rene Marois， a psychologist at Vanderbilt University in Nashville， Tennessee， is that there's a sticking point in the brain. To demonstrate this， Marois devised an experiment to locate it Volunteers watch a screen and when a particular image appears， a red circle， say， they have to press a key with their index finger. Different coloured circles require presses from different fingers. Typical response time is about half a second， and the volunteers quickly reach their peak performance. Then they learn to listen to different recordings and respond by making a specific sound. For instance， when they hear a bird chirp， they have to say "ba〃 ； an electronic sound should elicit a "ko"， and so on. Again， no problem. A normal person can do that in about half a second， with almost no effort.

　　The trouble comes when Marois shows the volunteers an image， and then almost immediately plays them a sound Now they' re flummoxed.

　　"If you show an image and play a sound at the same time， one task is postponed， he says. In fact， if the second task is introduced within the half-second or so it takes to process and react to the first， it will simply be delayed until the first one is done. The largest dual-task delays occur when the two tasks are presented simultaneously； delays progressively shorten as the interval between presenting the tasks lengthens.

　　There are at least three points where we seem to get stuck， says Marois. The first is in simply identifying what we‘re looking at This can take a few tenths of a second， during which time we are not able to see and recognize a second item. This limitation is known as the "attentional blink" ： experiments have shown that if you're watching out for a particular event and a second one shows up unexpectedly any time within this crucial window of concentration， it may register in your visual cortex but you will be unable to act upon it Interestingly， if you don7 t expect the first event， you have no trouble responding to the second. What exactly causes the attentional blink is still a matter for debate.

　　A second limitation is in our short-term visual memory. It' s estimated that we can keep track of about four items at a time， fewer if they are complex. This capacity shortage is thought to explain， in part， our astonishing inability to detect even huge changes in scenes that are otherwise identical， so-called "change blindness" . Show people pairs of near-identical photos - say， aircraft engines in one picture have disappeared in the other - and they will fail to spot the differences. Here again， though， there is disagreement about what the essential limiting factor really is. Does it come down to a dearth of storage capacity， oris it about how much attention a viewer is paying？

　　A third limitation is that choosing a response to a stimulus — braking when you see a child in the road， for instance， or replying when your mother tells you over the phone that she' s thinking of leaving your dad —also takes brainpower. Selecting a response to one of these things will delay by some tenths of a second your ability to respond to the other* This is called the "response selection bottleneck" theory， first proposed in 1952.

　　But David Meyer， a psychologist at the University of Michigan， Ann Arbor， doesn't buy the bottleneck idea. He thinks dual-task interference is just evidence of a strategy used by the brain to prioritise multiple activities. Meyer is known as something of an optimist by his peers. He has written papers with titles like "Virtually perfect time-sharing in dual-task. people can benefit from practice. Not only did they learn to perform better， brain scans showed that underlying that improvement was a change in the way their brains become active. While if s clear that practice can often make a difference， especially as we age， the basic facts remain sobering. \ have this impression of an almighty complex brain/， says Marois， "and yet we have very humbling and crippling limits/' For most of our history， we probably never needed to do more than one thing at a time， he says， and so we haven't evolved to be able to. Perhaps we will in future， though. We might yet look back one day on people like Debbie and Alun as ancestors of a new breed of true multitaskers.

　　参考答案：

　　27. RM (A名)的实验目的是什么？ D

　　29. 28. DM (A名)的观点是什么？ B

　　两个人共同同意的是什么？ D

　　30、 A

　　31. 21 B

　　32. attractional blink. C

　　33. change blindness E

　　34. bottleneck A

　　35. adaptive executive B

　　36、NOT GIVEN

　　37. NO[1]

　　38. 8‘ NOT GIVEN

　　YES

　　YES

　　(答案仅供参考)

　　以上是2015年9月19日雅思阅读真题回忆的全部内容，大家可以参考一下。最后祝各位烤鸭们都能取得理想成绩。