2013年職稱英語理工類B級閱讀理解練習(xí)題及答案(6)

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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 Geschwind 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 Dully experimented with this technique at Children's Hospital Medical Center in Boston. Doctor Dully 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.

　　41　Which of the following is NOT mentioned in the passage? _________.

　　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.

　　42　Scientists found that the brain cells of a learning-disabled person differ from those of a normal person in _________.

　　A　structure and function

　　B　color and function

　　C　size and arrangement

　　D　color and arrangement

　　43　All of the following statements are TRUE except that _________.

　　A　many factors account for learning disorder

　　B　a learning-disabled person shows no outward signs

　　C　reading disabilities are a common problem that affects 10 percent of the population

　　D　the brain activity of learning-disabled children is different from that of normal children

　　44　Doctor Duffy believed that __________.

　　A　he found the exact cause of learning disabilities

　　B　the problem of learning disabilities did not lie in the left side of the brain

　　C　the problem of learning disabilities resulted from the left side of the brain

　　D　the problem of learning disabilities was not limited to the left side of the brain

　　45　According to the passage we can conclude that further researches should be made __________.

　　A　to help learning-disabled children to develop their intelligence

　　B　to study how children learn to read and write, and use numbers

　　C　to investigate possible influences on brain development and organization

　　D　to explore how the left side of the brain functions in language learning

    參考答案：

　　41　A文章中沒有提及下列中的哪一項?A學(xué)習(xí)上的缺陷可能是大腦的某個未知的區(qū)域造成的;B學(xué)習(xí)上的缺陷可能是對整個大腦的損傷造成的;C學(xué)習(xí)上的缺陷可能是由腦細(xì)胞的不正常排列造成的;D學(xué)習(xí)上的缺陷可能是大腦左半球的問題造成的。

　　42　D科學(xué)家發(fā)現(xiàn)學(xué)習(xí)上有缺陷的人的腦細(xì)胞與正常人的不同在于：A結(jié)構(gòu)和功能;B顏色和功能;C大小和排列方式;D顏色和排列方式。

　　43　C下列陳述中不正確的是哪一項?A造成學(xué)習(xí)缺陷的因素很多;B學(xué)習(xí)有缺陷的人表面沒有明顯標(biāo)志;C閱讀缺陷是一個非常普遍的問題，有這方面問題的人占總?cè)丝诘?0%;D學(xué)習(xí)有缺陷的兒童與正常兒童的大腦活動方式不同。

　　44　D Duffy醫(yī)生相信：A他發(fā)現(xiàn)了造成學(xué)習(xí)缺陷的確切原因;B學(xué)習(xí)缺陷不是大腦左半球的問題造成的;C學(xué)習(xí)缺陷是由大腦左半球的問題造成的;D學(xué)習(xí)缺陷不僅僅是由大腦左半球的問題造成的。

　　45　C根據(jù)文章可以推斷出以后的研究應(yīng)主要致力于：A幫助有學(xué)習(xí)缺陷的兒童發(fā)展智力;B研究兒童是如何學(xué)習(xí)閱讀、寫作和使用數(shù)字的;C找出可能影響大腦發(fā)育及其結(jié)構(gòu)的原因;D找出大腦左半球在語言學(xué)習(xí)過程中的功能。

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