首页
登录
职称英语
A blind baby is doubly handicapped. Not only is it unable to see, but becaus
A blind baby is doubly handicapped. Not only is it unable to see, but becaus
游客
2023-08-16
14
管理
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 device 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 Dennis 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. [br] The research involving infant Dennis is directed to _____.
选项
A、helping the blind to see and learn as well as others
B、facilitating the learning process of blind children
C、solving blind children’s psychological problems
D、finding out how children develop intellectually
答案
B
解析
首段第3句末的不定式to prevent a lag in the learning process表明了实验目的,另外,文章一开头就提到了本文讨论重点是针对blind children,B为本题答案。A中的the blind指的是所有盲人,而实验研究的只是“盲童”,而且研究的是“学习”的问题,而不是“看”的问题,因此A不正确;选项C中的psychological problems过于空泛;D中的children范围也过宽,原文只关注“盲童”,而不是所有儿童。
转载请注明原文地址:https://tihaiku.com/zcyy/2932230.html
相关试题推荐
Depression[A]Inbed,youtossandturn,unableto
Depression[A]Inbed,youtossandturn,unableto
Depression[A]Inbed,youtossandturn,unableto
Depression[A]Inbed,youtossandturn,unableto
Depression[A]Inbed,youtossandturn,unableto
Ablindbabyisdoublyhandicapped.Notonlyisitunabletosee,butbecaus
Ablindbabyisdoublyhandicapped.Notonlyisitunabletosee,butbecaus
Ablindbabyisdoublyhandicapped.Notonlyisitunabletosee,butbecaus
Ablindbabyisdoublyhandicapped.Notonlyisitunabletosee,butbecaus
[originaltext]Sunday,2ndNovember,willremaininmymemorybecauseIdid
随机试题
[originaltext](5)OnOctober17,hurricaneGonzalohittheislandofBermuda
Weusuallythinkthatpeoplehavefivesenses.Sensesarethe【B1】______we
能够感染机体并可激发机体免疫系统攻击胰岛B细胞,引起糖尿病的病原体是A.EB病毒
编制资产评估计划确定各主要过程的具体步骤时,应当考虑的因素有()。A.明确
左边给定的是纸盒的外表面,下列哪一项能由它折叠而成?
2011年我国全年货物进出口总额36421亿美元,比上年增长22.5%。其中,
(2018年真题)关于基金管理公司风险管理工作的次序,以下正确的是()。A
在一个有家庭、企业、政府和国外的部门构成的四部门经济中GDP正确的有A.消费、投
小活络丹的功用是A.化痰通络 B.祛风除湿 C.活血止痛 D.息风止痉
根据《标准设计施工总承包招标文件》,下列关于预付款保函和预付款支付的说法错误的是
最新回复
(
0
)