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
2024-03-01
50
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/3495011.html
相关试题推荐
【B1】[br]【B5】[originaltext]Goodevening,welcometothefirstmeetingofours
【B1】[br]【B3】[originaltext]Goodevening,welcometothefirstmeetingofours
【B1】[br]【B2】[originaltext]Goodevening,welcometothefirstmeetingofours
[originaltext]Todayitisperfectlynaturalforustoshakehandswhenwegreet
[originaltext]Todayitisperfectlynaturalforustoshakehandswhenwegreet
[originaltext]Todayitisperfectlynaturalforustoshakehandswhenwegreet
[originaltext]Oneofthemostimportantquestionsaworkercanaskis:"WillI
[originaltext]W:CanIhelpyou?M:Yes,I’dliketoreadsomearticlesthatar
【B1】[br]【B10】[originaltext]Okay.YourememberthatI’vementionedthatit’si
【B1】[br]【B8】[originaltext]Okay.YourememberthatI’vementionedthatit’sim
随机试题
IntheUSA,85%ofthepopulationovertheageof21approveofthedeathpe
______nobodywasveryinterestedinit,theydecidedtocancelthetrip.A、Event
套期保值的核心是()。A、选取套期保值工具B、确定套期保值时间C、风险对冲D、规避套期保值风险C套期保值的核心是“风险对冲”,也就是将期货工具
【S1】[br]【S5】I根据句子的意思:“随着人口的增长,人们对优质商品有了更多的……”来判断,应当选择demand(需求)。
患者,女性,21岁。腹泻、呕吐半天,诊断为急性胃肠炎。正确的护理措施是A.嘱患者
某钢筋混凝土简支梁,安全等级为二级。梁截面尺寸为250mm×600mm,混凝土强
脾肾虚寒,火不生土之五更肾泄之证。治宜A.四神丸 B.真人养脏汤 C.桑螵蛸
在个人住房贷款业务中,贷后管理工作不包括()。A.合同签约 B.贷款档案
炮制后能缓和燥性和酸性,增强健胃消胀作用的药物是A.苍术 B.斑蝥 C.白术
患者,男,61岁。上颌缺失,其余牙基本正常。欲行活动义齿修复。此牙列缺损较为合理
最新回复
(
0
)