首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
A、Because the old one could not transfer signals clearly. B、Because the old one could only send two messages along the same line
A、Because the old one could not transfer signals clearly. B、Because the old one could only send two messages along the same line
admin
2013-05-19
38
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:https://kaotiyun.com/show/Ttg7777K
0
大学英语四级
相关试题推荐
Lookingbackonmychildhood,Iamconvincedthatnaturalistsarebornandnotmade.Althoughwewereallbroughtupinthesame
Japanisgettingtoughaboutrecycling—andnotinthepaperandplastickindofway.Recently,thecountryrequiresthatallele
Manyprivateinstitutionsofhighereducationaroundthecountryareindanger.Notallwillbesaved,andperhapsnotalldeser
Afterintensiveresearch,scientistshaveconcludedthatpoliticianslie.InastudydescribedinBritain’sObservernewspap
Afterintensiveresearch,scientistshaveconcludedthatpoliticianslie.InastudydescribedinBritain’sObservernewspap
Spaceisadangerousplace,notonlybecauseofmeteors(流星)butalsobecauseofraysfromthesunandotherstars.Theatmosphere
AcademyAwardsEveryFebruaryOscarFeverhitstheentertainmentcommunityandfilmfansaroundtheworld.Hundredsofmilli
A、Theircar.B、Theiroffice.C、Theirnewhouse.D、Theirjourney.C信息词ourroomandJimmy’sroom说明他们在谈论自己的家。
Themanagerwouldratherhisdaughter______(不在同一个办公室内工作).
Spaceisfilledwithradiantenergyandbeyondearth’satmospherethisenergyflowsteadilyandintenselyfromthesun.Anabund
随机试题
甲对自己在某小区3楼的一套新房装修,其经常装修到半夜,影响周围邻居休息,但甲认为自己在屋内装修,别人无权干涉。甲的行为违反了民法中的()
A.内虚邪中B.内伤积损C.心火暴盛D.正气自虚E.湿痰生热
运动系统最主要和最基本的检查方法是
交易所交易的衍生工具指的是()
下列均属于唐代的书法家有()
物证检验可由()进行。
下图中由外力作用形成的是()。
与以往经济危机的影响相比,1929~1933年经济危机的最大特点是()
A、 B、 C、 D、 A有几个男人在钓鱼。在这种情况下,只要听清了动词就能轻松找到正确答案。在fishing,sitting,picking,swimming中准确表现男人动作的是fishing。因此正确答
AprilFools’Special:History’sHoaxesHappyAprilFools’Day.Tomarktheoccasion,NationalGeographicNewshascompiled
最新回复
(
0
)