首页
登录
职称英语
When was the first actual radio broadcast made? [br] [originaltext] It was an
When was the first actual radio broadcast made? [br] [originaltext] It was an
游客
2024-10-30
63
管理
问题
When was the first actual radio broadcast made? [br]
It was an Italian inventor who created the first wireless device for sending out radio signals in 1895. But not until the American inventor Lee De Forest built the first amplifying vacuum tube in 1906 did we get the first radio as we know it. And the first actual radio broadcast was made on Christmas Eve of 1906. That’s when someone working from an experimental station in Brand Rock, Massachusetts, arranged the program of two short musical selections, a poem and a brief holiday greeting. The broadcast was heard by wireless operators on ships with a radio through several hundred miles. The following year, De Forest began regular radio broadcasts in New York. These programs were similar to much of what we hear on the radio today in that De Forest played only music. But because there were still no home radio receivers, De Forest’s audience consisted of only wireless operators on ships in New York harbor. There is no doubt that radio broadcasting was quite a novelty in those days. But it took a while to catch on commercially. Why? For the simple fact that only a few people, in fact, only those who tinkered with wireless telegraphs as a hobby, owned receivers. It wasn’t until the 1920’s that someone envisioned mass appeal for radio. This was radio pioneer, David Sarnoff, who predicted that one day there would be a radio receiver in every home.
选项
A、They would get smaller in size.
B、Their signals would travel further.
C、They would become less popular than television.
D、They would be common household items.
答案
D
解析
语义理解题。从“This was radio pioneer, David Sarnoff, who predicted that one day there would be a radio receiver in every home.”可知总有一天,每个家庭都将拥有无线电收音机。选项D为正确答案。
转载请注明原文地址:http://tihaiku.com/zcyy/3824267.html
相关试题推荐
Whenwasthefirstactualradiobroadcastmade?[br][originaltext]Itwasan
Whatarespeakersmainlydiscussing?[br][originaltext]M:Howdidyoulikeyes
Whatarespeakersmainlydiscussing?[originaltext]M:Howdidyoulikeyesterday
HowmanyelectoratesopposedtheEUconstitutioninFrench?[originaltext]Fre
Howmanyhijackersareinvolvedinthenews?[originaltext]Russiancommandos
Whatarethespeakersmainlydiscussing?[br][originaltext]W:DoctorWhite,we
Whatarethespeakersmainlydiscussing?[br][originaltext]W:DoctorWhite,we
Whatarethespeakersmainlydiscussing?[originaltext]W:DoctorWhite,werecen
Whatseemstosurprisethemanaboutthenewproduct?[br][originaltext]W:I’v
Whatseemstosurprisethemanaboutthenewproduct?[originaltext]W:I’vebeen
随机试题
Theaimofajobinterviewistoestablishwhetheryouarelikelytodowel
BothinwhatisnowtheeasternandthesouthwesternUnitedStates,the
下面你将听到一段有关坚持在发展中保障和改善民生的讲话。[originaltext]改革开放以来,我国在人民生活领域发生的巨变是广泛而深刻的。从
Statisticsshowthattheaveragefamilysizeincreasesininverseratiotothem
我国海运保险的几个基本险别中,承保责任范围最窄的是( )。A.—切险 B.平
C线圈串联时,自感相加,顺向串联则两电感的耦合是助磁效果,互感相加。
下列不属于儒家经典著作的是()。A.《论语》 B.《荀子》 C.《老子
()是心理咨询中最为重要的原则。A.保密原则 B.信赖性原则 C.
下列哪些是应对各类突发公共事件的工作原则( )A.以人为本,减少危害 B
某交易者以2090元/吨买入3月强筋小麦期货合约100手,同时以2180元/吨卖
最新回复
(
0
)