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  3. 共用题干 The Bilingual BrainWhen Karl Kim immigrated to the United States from K...

共用题干 The Bilingual BrainWhen Karl Kim immigrated to the United States from K...

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问题 共用题干
The Bilingual Brain
When Karl Kim immigrated to the United States from Korea as a teenager,he had a hard time learning English.Now he speaks it fluently, and he had a unique opportunity to see how our brains adapt to a second language.As a graduate student, Kim worked in the lab of Joy Hirsch, a neuroscientist in New York Their work led to an important discovery.They found evidence that children and adults don't use the same parts ofthe brain when they learn a second language.
The researchers used an instrument called an MRI(magnetic resonance imaging)scanner to study the brains of two groups of bilingual people.One group consisted of those who had learned a second language as children.The other consisted of people who,like Kim,learned their second language later in lite.Peoplefrom both groups were placed inside the MRI scanner ,This allowed Kim and Hirsch to see which parts of thebrain were getting more blood and were more active.They asked people from both groups to think about whatthey had done the day before ,first in one language and then the other.They couldn't speak out loudbecause any movement would disrupt（干扰）the scanning.
Kim and Hirsch looked specifically at two language centers in the brain-Broca' s area, which isbelieved to control speech production,and Wernicke's area,which is thought to process meaning.Kim andHirsch found that both groups of people used the same part of Wernicke's area no matter what language theywere speaking.But their use of Broca's area was different.
People who learned a second language as children used the same region in Broca's area for both tneir first and second languages.People who learned a second language later in life used a different part of Broca's area for their second language.How does Hirsch explain this difference?Hirsch believes that when language is first being programmed in young children,their brains may mix the sounds and structures of all languages in the same area.Once that programming is complete,the processing of a new language must be taken over by adifferent part of the brain.
A second possibility is simply that we may acquire languages differently as children than we do asadults.Hirsch thinks that mothers teach a baby to speak by using different methods involving touch,sound and sight.And that is very different from learning a language in a high school or college class.
选项 Karl Kim's study showed that______.
A:people learn English and Korean in different ways
B:children and adults use the different parts of the brain to learn a second language
C:it is not possible for an adult to speak a second language fluently
D:people's brains will not change when they learn a second language
答案B
解析由文章第一段最后一句可知，他们发现证据表明儿童和成人在学习第二语言时使用的是大脑的不同区域，故选B。
由文章第二段第一句可知，研究人员使用一种名为MRI扫描仪的设备来研究这两组学习双语人群的大脑活动，故选C。
由文章第三段第一句可知，这两个中枢的作用分别是控制语言产出和处理语言意义，这属于中枢的功能，故选B。
由文章第四段第一句可知，从儿童时期就开始学习第二语言的人在学习第二语言时所使用的大脑布洛卡区域和学母语时相同，故选A。
文章最后一段主要讲的是儿童和成年人学习语言的方式和手段不同，尤其提到了母亲在教授儿童语言时的独特方式：触觉、视觉和听觉等多种手段并用。这与以后学校的语言学习手段有着很大不同。我们可以推断出母亲很擅长教授孩子语言，尤其从“Hirsch thinks that mothers teach a baby to speak by using different methods involving touch,sound and sight.”这句话更可以看出。选项D是根据我们学习语言的经验得出的推断，但文中并没有这层隐含之意。
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