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
88
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
ThenumberofwomendirectorsappointedtocorporateboardsintheUnitedSt
WhythepassengerjetwasforcedtolandatHalifax,Canada?[br][originaltext
A.BusinessmanagerYouwillberesponsibleforourglobalbusinesswithins
[originaltext]Therearemanycommonlyheldbeliefsabouteyeglassesandey
作为卫生法渊源之一,卫生行政法规是()A.国务院制定的 B.卫生部制定的
供应商认证并不意味着()。A.所有的卖主都获得了ISO9000认证 B.-
集体合同与劳动公司的( )表现在,协商、订立集体合同的目的是规定企业的一般劳动
关于货币经纪公司的业务说法正确的有()。 A.为境内外非金融类企业提供贷款服
女,34岁。口腔反复溃疡10年,加重1年。10年来,口腔溃疡反复发作,近一年来发
下列盾构类型中,属于密闭式盾构的有()。A.机械挖掘式盾构 B.手掘式盾构
最新回复
(
0
)