首页
登录
职称英语
[originaltext] Good morning, students. I hope you have read the two books ab
[originaltext] Good morning, students. I hope you have read the two books ab
游客
2023-07-15
17
管理
问题
Good morning, students. I hope you have read the two books about speech. Today’s lecture deals with the presence of the unusually large deaf population that existed on the Massachusetts island of Martha’s Vineyard for about three centuries. From the settlement of the islands in the 1640s to the 20th century, 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, setting an example of the genetic patterns for the inheritance of deafness. Indeed in the late 18th century 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 telephone and a prominent investigator into hearing loss, visited Martha’s Vineyard to study the population. But because the principles of genetics and inheritance were still unknown, he was not able to explain the patterns of deafness and why a deaf parent did not always have deaf children. In the 20th century, the local population began to marry people off the island and the rate of deafness started to fall.
选项
A、At the library.
B、In a lecture hall.
C、On Martha’s Vineyard.
D、At a telephone laboratory.
答案
B
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2838867.html
相关试题推荐
[originaltext]MoreAmericansareGooglingthemselves—andmanyarechecking
[originaltext]Extremelyhotweatheriscommoninmanypartsoftheworld.A
[originaltext]M:Ireallycan’tstandthemanymore!W:Who?Whathappened?M:(
[originaltext]M:Ireallycan’tstandthemanymore!W:Who?Whathappened?M:(
[originaltext]W:Iamabitfedupwithcatchingthesametraineverymorning,
[originaltext]W:Iamabitfedupwithcatchingthesametraineverymorning,
[originaltext]W:Iamabitfedupwithcatchingthesametraineverymorning,
[originaltext]W:Iamabitfedupwithcatchingthesametraineverymorning,
[originaltext]Childhoodpovertyhasbothimmediateandlastingnegativeeff
[originaltext]Childhoodpovertyhasbothimmediateandlastingnegativeeff
随机试题
NewicecoresamplestakenfromthecentreoftheGreenlandice-sheethaveg
[audioFiles]audio_ezftlmnj_0001(20101)[/audioFiles]
肾小球滤过率是指()A.两侧肾脏每分钟生成的原尿量 B.一侧肾脏每分钟生成的
患者男,70岁,有"慢性咳嗽、咳痰30年"病史,1周前感冒后
患儿男,3岁。水肿、尿少1个月,血压120/80mmHg,尿常规:蛋白(++++
遇有下列()情形之一的,审计组应当及时调整审计实施方案。 A.审计组人员及其
某企业购置一台设备,固定资产原值为20万元,采用双倍余额递减法折旧,折旧年限为1
家庭教养模式从纵向和横向两方面影响个体。下列家庭教养模式影响因素中,对个体具有纵
银行风险管理流程包括的环节有()。 A.风险计量B.风险识别C.风险监测
计提长期借款利息的账务处理中,借方可能涉及的账户有()。A、管理费用 B、财务
最新回复
(
0
)