首页
登录
职称英语
[originaltext] Thomas Edison is a well known American inventor. He was taugh
[originaltext] Thomas Edison is a well known American inventor. He was taugh
游客
2024-02-14
52
管理
问题
Thomas Edison is a well known American inventor. He was taught by his mother when he was a child. Later he learned things by himself by reading and experimenting. He built a lab for himself to work in, and he worked very hard in his sixty years of scientific activities. He made over a thousand inventions. Few inventors in the world have had such great success.
Edison’s first invention was made in 1868. He was then a telegraph operator. He wished to work out a new method to improve the old telegraph system because it was impossible at that time for the system to send more than one message along the same line at the same time. He read all the works of Faraday, another great scientist, before starting his invention. Sometimes he didn’t go to bed and didn’t even stop to eat. He thought he had very much to do and there was no time to lose. Days and nights he was reading and reading. After he read through Faraday’s writings, he began his experiments. A few months later he succeeded in building a double transmitter and improved the old telegraph System.
选项
A、Because the old one could not transfer signals clearly.
B、Because the old one could only send two messages along the same line simultaneously.
C、Because the old one could not send messages quickly enough.
D、Because the old one could not send more than one message at the same time.
答案
D
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3449809.html
相关试题推荐
SomeAmericansarealittlenervousaboutthenation’sfuture,butothersfe
SomeAmericansarealittlenervousaboutthenation’sfuture,butothersfe
InonlytwodecadesAsianAmericanshavebecomethefastest-growingU.S.min
InonlytwodecadesAsianAmericanshavebecomethefastest-growingU.S.min
InonlytwodecadesAsianAmericanshavebecomethefastest-growingU.S.min
Americansareproudoftheirvarietyandindividuality,yettheyloveandre
Americansareproudoftheirvarietyandindividuality,yettheyloveandre
[originaltext]OneofraymaingoalsinthissurveycourseofAmericanpaint
[originaltext]OneofraymaingoalsinthissurveycourseofAmericanpaint
[originaltext]OneofraymaingoalsinthissurveycourseofAmericanpaint
随机试题
Thetelevisionwasreturnedbecauseofa______.A、defectB、deficiencyC、mistakeD
Inthecenterofabigcitythereareusuallydozensoflargeofficebuildin
Allthings______,theplannedmeetingwillhavetobeputoff.A、consideredB、are
Ellenwaspleasedtohearpeoplepraisehergreattanskin.[br]Peoplewithdar
循环队列是空队列的条件是()。A.Q->rear==Q->f
下列各项中,属于对重大事故进行罚款处理的是()。A.10万以上20万以下 B.
以下支持结核性胸腔积液诊断的是()A.胸水白蛋白血清白蛋白<0.5 B.黎
实行会员分级结算制度的期货交易所会员由()组成。A.非期货公司会员 B.期货
内河常见的特征水位有()。A.最高水位 B.枯水位 C.最低水位 D.洪
下列选项中,属于管理工作流程组织的有()。A.进度控制流程 B.设计变更
最新回复
(
0
)