首页
登录
职称英语
[originaltext] Good morning, students. I hope you have been able to read the
[originaltext] Good morning, students. I hope you have been able to read the
游客
2023-07-29
16
管理
问题
Good morning, students. I hope you have been able to read the two books about speech and hearing problems that I put on the list. Today’s lecture deals with the presence of the unusually large deaf population that existed on the Massachusetts island Martha’s Vine-yard for about three centuries. From the settlement of the island in the 1640s to the 20th century, the people there, who were descended from only 25 or 30 original families, married mainly other residents of the island. They formed a highly inbred group, producing an excellent example of the genetic patterns for the inheritance of deafness. Indeed in the late 1800 one out of every 25 people in one village on the island was born deaf and the island as a whole had a deafness rate at least 17 times greater than that of the rest of the United States. Even Alexander Graham Bell, the inventor of the tele- phone and a prominent researcher into hearing loss, visited Martha’s Vineyard to study the population. But because of the principles of genetics a deaf parent did not always have deaf children. In the 20th century, the local population has mixed the people off the island and the rate of deafness has fallen.
选项
A、A large number of its residents were deaf.
B、It was settled more than 300 years ago.
C、Each family living there had many children.
D、Alexander Graham Bell visited there.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2878751.html
相关试题推荐
[originaltext]"Gototheplaygroundandhavefun,"parentswilloftensayt
[originaltext]Agoodreaderreadsfastandunderstandsmostofwhatheors
[originaltext]Agoodreaderreadsfastandunderstandsmostofwhatheors
[originaltext]Agoodreaderreadsfastandunderstandsmostofwhatheors
[originaltext]M:Hello,LiMin.Comeonin,andhow’veyoubeenkeepingrecentl
[originaltext]M:Hello,LiMin.Comeonin,andhow’veyoubeenkeepingrecentl
[originaltext]M:Hi,Shelly!Howwasyourvacation?W:Great!IwenttoNewOrl
[originaltext]Didyouknowthatvegetablescanbetrickedintogrowinginc
[originaltext]Thekeyquestionforanyonlychildisthis:whywereyouan
[originaltext]Thekeyquestionforanyonlychildisthis:whywereyouan
随机试题
[img]2016m11x/ct_eyyjsaz2016c_eyyjsaread_0070_201610[/img]Asmostarearesi
按所从事的业务性质区分,市场中间组织可分为()。A.商业性中间商、代理性中间
科斯定理
A.缺失 B.面大部分缺损 C.缺失 D.缺失 E.缺失需要用托确定正中
可引起二便失蘩,骨瘦痿软,遗精等症状的情志异常是A.恐惧过度 B.过度愤怒
下列选项中,可以由题干图形拼凑而成的是: A.如上图所示 B.如上图所示
药物与适宜基质混合均匀制成的半固体外用制剂是A.凝胶膏剂B.橡胶膏剂C.煎膏剂D
社区社会工作者小钱策划了“从心出发,关爱有我”失智老人照顾者支持服务方案。在决定
对涉及商业秘密的政府信息公开申请,若公开会对第三方合法权益造成损害,行政机关不得
下列关于建筑施工企业负责人施工现场带班制度,不正确的是()。A.企业负责人
最新回复
(
0
)