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
75
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、The patterns of marriage have changed.
B、Many deaf people have regained their hearing.
C、Most of the original population has left the island.
D、The island has become famous for its research facilities.
答案
A
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2838870.html
相关试题推荐
Doyoufindgettingupinthemorningsodifficultthatit’spainful?Thism
Doyoufindgettingupinthemorningsodifficultthatit’spainful?Thism
Doyoufindgettingupinthemorningsodifficultthatit’spainful?Thism
Doyoufindgettingupinthemorningsodifficultthatit’spainful?Thism
Doyoufindgettingupinthemorningsodifficultthatit’spainful?Thism
Doyoufindgettingupinthemorningsodifficultthatit’spainful?Thism
[originaltext]OneofraymaingoalsinthissurveycourseofAmericanpaint
[originaltext]OneofraymaingoalsinthissurveycourseofAmericanpaint
[originaltext]Thelawyersrepresentingtwoeleven-year-oldboysaccusedofk
[originaltext]M:Here’syourroom,you’llstayhereoverthreenights,madam?W
随机试题
Myfatherbelievedthatthereweremysteriousforces(神秘的力量)atworkinthe
Readingisanimportantskillthatneedstobedevelopedinchildren.Noton
Doctorsaretobeginatrialofadrugtreatmentthatcoulddoublethetime
SuggestionsforEffectiveResearch-BasedAssignmentsI.Thefun
CordiaHarringtonwastiredofstandingupalldayandsmellinglikeFrench
以下文件格式中属于音频文件的是( )。A.PDF B.WAV C.AVI
患者,女性,30岁,干农活时不慎铁钉刺入脚底,9日后发生肌肉痉挛,给予注射TAT
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
根据企业所得税法律制度的规定,关于确认收入实现时间的下列表述中,正确的是(
患者,男,65岁,肺癌晚期,顺铂等药物化疗后,突发尿量减少,可能是发生以下哪种情
最新回复
(
0
)