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
78
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
TheInternetisaninternationalcollectionofcomputernetworksthatallunderstandastandardsystemofaddressesandcommands
Eachartistknowsinhisheartthatheissayingsomethingtothepublic.Hehopesthepublicwilllistenandunderstand—hewant
A、Studyingismoreinterestingsohe’llstudyseriouslyatschool.B、Studyingatschoolisnomoreinterestingthanwork.C、Heh
The__________oftherelieftothefloodedareawasheldupbecauseoftheinconvenientroadconditions.
I’dratheryou___________(不对此事发表任何评论)theissueforthetimebeing.
Scienceforself-reliancehas,inrecentyears,becomeamatterofgreatconcernforThirdWorldanddevelopingnations.Thesen
Spaceisfilledwithradiantenergyandbeyondearth’satmospherethisenergyflowsteadilyandintenselyfromthesun.Anabund
Spaceisfilledwithradiantenergyandbeyondearth’satmospherethisenergyflowsteadilyandintenselyfromthesun.Anabund
Spaceisfilledwithradiantenergyandbeyondearth’satmospherethisenergyflowsteadilyandintenselyfromthesun.Anabund
A、Shecouldn’tgetadmittedtomedicalschool.B、ShedecidedtofurtherhereducationinParis.C、Shecaughtaseriouseyeillne
随机试题
()是液压传动的基本特点之一。
项目管理协会把项目生命周期划分为四个阶段,下列不属于项目生命周期阶段的是()
良恶性肿瘤在病理变化方面的区别不包括
甲股份有限公司(以下简称“甲公司”)为上市公司,有关购入、持有和出售乙公司发行的不可赎回债券的资料如下:资料一:2016年1月1日,甲公司支付价款1100万元(含交易费用),从活跃市场购入乙公司当日发行的面值为1000万元、5年期的不可赎回债券。该债
企业生产车间和行政管理部门发生的固定资产修理费用等后续支出,作为管理费用核算。()
关于录音节目编辑制作过程中的专业录音的说法,错误的是()。
甲被宣告死亡后,其妻乙改嫁于丙,其后丙死亡。1年后乙确知甲仍然在世,遂向法院申请撤销对甲的死亡宣告。依我国法律,该死亡宣告撤销后,甲与乙原有的婚姻关系如何?()
2005年1-10月,北京对俄罗斯的出口金额比2004年同期约净增()亿美元?从上表可以看出北京实现贸易顺差的国家或地区是()
两个四选一的选择题,一考生全凭猜测,两个题全选对的概率为()
利率期限结构(中国科学技术大学2013真题)
最新回复
(
0
)