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Learning Disabilities Learning disabilities are very common. They affect perhaps 10 percent of all children. Four times a
Learning Disabilities Learning disabilities are very common. They affect perhaps 10 percent of all children. Four times a
admin
2010-01-14
100
问题
Learning Disabilities
Learning disabilities are very common. They affect perhaps 10 percent of all children. Four times as many boys as girls have learning disabilities.
Since about 1970, new research has helped brain scientists understand these problems better. Scientists now know there are many different kinds of learning disabilities and that they are caused by many different things. There is no longer any question that all learning disabilities result from differences in the way the brain is organized.
You cannot look at a child and tell if he or she has a learning disability. There is no outward sign of the disorder. So some researchers began looking at the brain itself to learn what might be wrong.
In one study, researchers examined the brain of a learning-disabled person who had died in an accident. They found two unusual things. One involved cells in the left side of the brain, which control language. These cells normally are white. In the learning disabled person, however, these cells were gray. The researchers also found that many of the nerve cells were not in a line the way they should have been. The nerve cells were mixed together.
The study was carried out under the guidance of Norman Geschwind, an early expert on learning disabilities. Doctor Gesehwind proposed that learning disabilities resulted mainly from problems in the left side of the brain. He believed this side of the brain failed to develop normally. Probably, he said, nerve cells there did not connect as they should. So the brain was like an electrical device in which the wires were crossed.
Other researchers did not examine brain tissue. Instead, they measured the brain’s electrical activity and made a map of the electrical signals.
Frank Duffy experimented with this technique at Children’s Hospital Medical Center in Boston. Doctor Duffy found large differences in the brain activity of normal children and those with reading problems. The differences appeared throughout the brain. Doctor Duffy said his research is evidence that disabilities involve damage to a wide area of the brain, not just the left side.
Which of the following is NOT mentioned in the passage?______
选项
A、Learning disabilities may result from the unknown area of the brain.
B、Learning disabilities may result from damage to a wide area of the brain.
C、Learning disabilities may result from abnormal organization of the brain cells.
D、Learning disabilities may result from problems in the left side of the brain.
答案
A
解析
文章中没有提及下列中的哪一项? A 学习上的缺陷可能是大脑的某个未知的区域造成的;B 学习上的缺陷可能是对整个大脑的损伤造成的;C 学习上的缺陷可能是由脑细胞的不正常排列造成的;D学习上的缺陷可能是大脑左半球的问题造成的。
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本试题收录于:
职称英语理工类基础题库职称英语分类
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