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
A blind baby is doubly handicapped. Not only is it unable to see, but because it cannot receive the visual stimulus from its env
A blind baby is doubly handicapped. Not only is it unable to see, but because it cannot receive the visual stimulus from its env
admin
2014-01-07
52
问题
A blind baby is doubly handicapped. Not only is it unable to see, but because it cannot receive the visual stimulus from its environment that a sighted child does, it is likely to be slow in intellectual development. Now the ten-month old son of Dr. and Mrs. Dennis Daughters is the subject of an unusual psychological experiment designed to prevent a lag in the learning process. With the aid of a sonar-type electronic that he wears on his head, infant Dennis is learning to identify the people and objects in the world around him by means of echoes.
The device is a refinement of the "Sonicguide", an instrument produced by Telesensory Systems, Inc., of Palo Alto, Calif., and used by blind adults in addition to a sane or guide dog. As adapted for Dennis, it consists of a battery-powered system about the size of a half dollar that is on a headgear. A transmitter emits an ultrasonic pulse that creates an 80 degree cone of sound at 6 feet. Echoes from objects within the cone are perceived as sounds that vary in pitch and volume with the size and distance of the object.
The closer an object is, the lower the pitch, and the larger the object, the louder the signal. Hard surfaces produce a sharp ping, while soft ones send back signals with a slightly fuzzy quality. An object slightly to the right of Denny’s sends back a louder sound to his right ear than to the left. Thus, by simply moving his head right and left and up and down, he can not only locate an object but also get some notion of its shape and size, thanks to the varying qualities of sounds reaching his ears as the cone of ultrasound passes
its edges
. Dennis likes to use the device to play a kind of peek-a-boo with his mother. Standing on her knee and facing her directly, he receives a strong signal in both ears. By turning his head away, he makes her seem to disappear. "From the first time he wore it," says Mrs. Daughters, "it was like a light going on in his head."
What remains to be determined is how well the device will help Dennis cope with his surroundings as he begins to walk and venture further into his environment. Meanwhile, Telesensory, Inc. is working on the development of sonar device with somewhat the same sensitivity as Dennis’s for use by school-age children.
What is Telesensory Systems, Inc. most likely to think about infant Dennis’ device?
选项
A、It had better be used by blind children from school age.
B、It needs improving for use in a complicated environment.
C、It may not be so suitable for the blind adults.
D、It benefits blind children in terms of learning.
答案
D
解析
从末段末句中的school-age children及句中的其他内容可以推断Telesensory最可能认为Dennis的声纳定位仪有利于儿童的学习过程,因此D为本题答案。
转载请注明原文地址:https://kaotiyun.com/show/QyFK777K
0
专业英语四级
相关试题推荐
Thesocialdevelopmentandtechnologicaladvancesarechangingthewaypeopleconnectwitheachother.Somebelievethattechnol
VietnamsignedanagreementwiththeUnitedStatesto
TheInternet,E-commerceandglobalizationaremakinganeweconomicerapossible.Inthefuture,capitalistmarketswilllargel
Itwillbethefirsttimeshe______inpublic
Untilthen,hisfamily______fromhimforsixmonths.
Inthe19thcentury,thereusedtobeamodelofhowtobeagoodperson.Thereareallthesetorrentsofpassionflowingthroug
Bosseswoulddowelltobealarmed.Novemberishere,andwithitagoodchancethatthebackofficeisn’tprocessingdata,but
Rockmusichasbeenaccusedofhavingabeatthatisatoncetoostrongandtoosimplistic.Let’slookattheseissuesindividua
ThoughhavingbeenlivinginShanghaifor20years,hestillhasa______northernaccent.
随机试题
在肺癌中,最常见病理组织学类型是
健康促进的核心策略是
A.鼻流血B.双眼睑皮下青紫,逐渐加重C.乳突下或咽后壁黏膜下淤血D.脑脊液耳漏E.颞部头皮肿胀淤血前颅凹骨折
下列经济业务中,引起等式两边总额发生变化的有()。
银行汇兑的主要风险点不包括()。
法国A公司是国际知名的电气跨国公司,十年前通过设立中国分公司进入中国市场。针对中国成为世界加工厂和世界经济的有力推动者之一的趋势不断加强,A公司开始着手研究在中国的发展战略。经过十年充分的战略情报研究和战略保障准备,从2005年开始在中国实施并购。在中国
“君子欲化民成俗,其必由学乎”“古之王者,建国君民,教学为先”体现了()的教育目的观。
春夏秋冬四季的循环往复变化使得地球景观绚丽多彩,这是大自然赋予地球的珍贵礼物。然而四季这个礼物似乎分配不公。地球上只有温带才有明显的四季变化,而寒带和热带则是长冬无夏和长夏无冬。其原因是()。
社会主义职业道德中最高层次的要求,体现了社会主义职业道德的最高目标指向的是()
WhyWouldTheyFalselyConfess?Whyonearthwouldaninnocentpersonfalselyconfesstocommittingacrime?Tomostpeople,it
最新回复
(
0
)