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2012年2月6日更新GMAT阅读机经(二十五)

所属:其他考试 作者:cwf1986 阅读:1587 次 评论:0 条 [我要评论]  [+我要收藏]

小编摘要:海词为您收集GMAT机经,充足的准备是考G成功的最重要的一步。

  V4 bear_viola

  很长一屏多。开始说鸟是跟周围亲戚朋友学的,但是第二段J通过一个实验推出观点说有几种鸟声音很像,但是他们距离很远不可能是互相有影响推翻了第一段的结论,提出两个解释说一个是他们祖先是一样的,第二个不记得。第三段说是因为这些动物的大脑很类似,发声这个是被大脑控制的,举例说人类大脑损坏之后发声就会很奇怪。然后J也同意了这个大脑导致的观点,最后说这个能推到所有vertebrates身上

  V5 rdfyj 720

  第一段看得不认真,记得不多,大概和狗狗里差不多吧,

  第二段,一上来就说一个科学家做了个实验,得到了一个惊人的结果,这些鸟发那些声的时候脑子里有7个部分很活跃,然后有两个可能的解释,第一个是说,这几个鸟有一个相同的会发声的祖先,立马被科学家给否了,说如果这样的话,那肯定就存在一个大灭绝之类的,(这里有考点,问的是科学家对什么观点有所怀疑之类的)第二个是说他们自己琢磨出怎么发声的,就好比鸟和蝙蝠都是自己琢磨出怎么飞的,到最后居然都长着个翅膀了(冥冥之中自有天意啊——LZ)注意,这里仍然是考点,问的是这个例子拿来干啥子,具体选项忘记了,但是看了结构应该就不难吧

  第三段,为了证明第二个解释的正确性,又做实验发现,人发声相应的部分也很活跃啊,然后不会发声人的那些部分压根没反应,看来脊椎动物虽然都自己琢磨怎么叫唤,但是最后居然都有这个相同的属性,由此可见,这个属性是学习行为的一个关键环节(这部分似乎和狗有出路,我是按照自己的理解和记忆说的,大家判断下哈)有一题的考点似乎就是在最后一句

  第二段:A few years ago, Jarvis and his colleagues made the surprising discovery that when a songbird, parrot or hummingbird is producing its learned vocalization, a set of seven similar structures in the birds’ brains become active. The finding was unexpected because the three avian groups are only distantly related to one another. At the same time, they are closely related to other birds that are not vocal learners. Flycatchers, for example, belong to the same order as songbirds—Passeriformes—yet no flycatcher species tested so far displays the trait. One possible explanation, says Jarvis, is that the three groups of vocal learning birds had a common ancestor that possessed the skill. “But this means there would have been multiple losses of the ability over time, a sort of mass extinction of vocal learning,” he says. Another hypothesis is that vocal learners evolved similar brain structures independently over the last 65 million years, much the same way that birds and bats separately evolved wings that turned out to be so much alike.

  第三段:Discoveries about the human brain support this latter hypothesis. Scientists conducting imaging studies have found that when people speak, parts of their brains’ cerebrums that are similar to those of vocalizing songbirds, parrots and hummingbirds become active. They’ve also found that the same neural pathways are damaged in people who have lost the ability to speak due to injury or stroke. Jarvis now believes that vocal learning most likely developed independently in humans and the three bird groups (as well as in other learners whose brains have not been studied)—yet it arose from a pre-existing brain system, probably shared by all vertebrates, that controls learning to move.

  以上就是2月6日更新的GMAT阅读机经,考生可以适当借鉴,并通过练习来掌握GMAT阅读的解题规律,从而在GMAT考试中发挥出更好的水平。

0
2012-06-29 09:39 编辑:cwf1986
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