首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Learning disabilities are very common. They affect perhaps 10 percent of all children. Four times as many boys as girls have lea
Learning disabilities are very common. They affect perhaps 10 percent of all children. Four times as many boys as girls have lea
admin
2014-09-19
39
问题
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 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 reading disabilities involve damage to a wide area of the brain, not just the left side.
Scientists found that the brain cells of a learning-disabled person differ from those of a normal person in______.
选项
A、structure and function
B、color and function
C、size and arrangement
D、color and arrangement
答案
D
解析
本题是一道具体细节题。问科学家发现有学习缺陷的人的脑细胞与正常人的在哪些方面不同。文章第四段指出,在一种试验中,研究者检验在事故中丧生的学习上有缺陷的人的大脑,他们有两个异常发现:(1)大脑的左半球控制着语言能力,左半球的脑细胞应该是白色的,但是,有学习缺陷的人的左半球的脑细胞却是灰色的;(2)在有学习缺陷的人的大脑中,许多脑细胞不是像正常细胞一样呈线状排列的,而是团在一起的。因此,本题的正确答案应是D“颜色与排列方式不同”。
转载请注明原文地址:https://kaotiyun.com/show/ChWO777K
0
在职攻硕英语联考
相关试题推荐
Achildwhohasoncebeenpleasedwithatalelikes,asarule,tohaveitretoldinidenticallythesamewords,butthisshould
Neverbeforehasflyingbeensocontroversial.Inthespaceoftwoyears,theenvironmentaldamagedonebyplaneshasgonefrom
WhatistrueaboutCentralParkinNewYorkCity?
WhatistrueaboutCentralParkinNewYorkCity?
TheUnitedNationsWorldFoodProgramsays______couldpushonehundredmillionpeopleintohunger.
Humorisamosteffective,yetfrequentlyneglected,meansofhandlingthedifficultsituationsinourlives.Itcanbeusedfor
A、Themanislookingforsomeone.B、Themanhatesthetenseatmosphereinwaiting.C、Thewomandoesn’twanttobeneglected.D、T
A、ThetraintotheMarketSquareiscancelled.B、ThemanhasmissedthetraintotheMarketSquare.C、Thenexttrainwillleave
Whythisotherwiseexcellentnewspaperallowssuchanarticletobeprintedis______me.
Imaginegoingtoyourdoctorwithacomplaintoffrequentheadaches.Yourdoctortakesaprescriptionpadandwritesawordoni
随机试题
A.黏液痰B.铁锈色痰C.大量脓痰分三层D.痰恶臭E.大量粉红色泡沫痰支气管扩张患者其痰液呈()。
(2009年)己知杆AB和CD自重不计,且在C处光滑接触,若作用在AB杆上力偶的矩为M1,则欲使系统保持平衡,作用在CD杆上力偶的矩M2的转向如图4—24所示,其矩值为()。
关于环境管理体系标准的说法,正确的是()。
一What’sthematter?一Theshoe8don’tfitproperly.They_________myfeet.
习总书记指出:“不忘本来才能开辟未来,善于继承才能更好创新”。同时,他指出我们民族的“根”和“魂”是()。
根据材料回答下列问题2006年中国入境旅游、出境旅游和国内旅游均快速增长,旅游产业规模日渐庞大,已成为全球主要旅游国。全年入境旅游人数达到10904万人次,比上年增长18.96%;旅游外汇收入费计为257亿美元,比2005年增长47.67%,其中,出境旅
月球是距离地球最近的天体.但是如何从地球飞到月球并不是一个简单的问题,虽然早在30多年前阿波罗航天员就已经登上月球.但是今天人类重返月球不能简单地重复阿波罗登月的方式。因为今天人类重返月球比当年阿波罗登月要复杂和困难.不仅飞往月球的人数比阿波罗飞行要多得多
科学家与环保人士担心全球变暖的问题。使用化石燃料(如石油、煤)或大面积砍伐森林,是地球大气“温室气体”不断增加的两大因素。这些气体所吸收的热能越来越多,最终将改变天气型态、造成海平面与海洋温度的上升,以及形成有害于植物、野生动物和人类栖息地的气候反常。
Inthedaysbeforepreschoolacademieswereallbutmandatoryforkidsunder5,IstayedhomeandgotmyearlyeducationfromMi
ThelawisexpectedtoimprovetheefficacyofsurveillanceonHIVcarriers.
最新回复
(
0
)