首页
登录
职称英语
When was the first actual radio broadcast made? [originaltext] It was an Itali
When was the first actual radio broadcast made? [originaltext] It was an Itali
游客
2023-11-22
74
管理
问题
When was the first actual radio broadcast made?
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、On Christmas Eve of 1906.
B、On Christmas Eve of 1960.
C、On Christmas Eve of 1895.
D、On Christmas Eve of 1859.
答案
A
解析
情景事实题。短文的开篇讲到“And the first actual radio broadcast was made on Christmas Eve of 1906.”即真正能用来广播的装置是De Forest于1906年圣诞夜时做成的。选项A为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3209696.html
相关试题推荐
[originaltext]M:Goodmorning,everybody.[6-1]Studieshaveshownthatchildre
[originaltext]M:Goodmorning,everybody.[6-1]Studieshaveshownthatchildre
[originaltext]M:Goodmorning,everybody.[6-1]Studieshaveshownthatchildre
[originaltext]M:Goodmorning,everybody.[6-1]Studieshaveshownthatchildre
[originaltext]W:Goodafternoon,everybody.Amongthemistakesjournalistssome
[originaltext]W:Goodevening,everybody.Automation,drivenbytechnologicalp
[originaltext]W:Goodevening,everybody.Automation,drivenbytechnologicalp
[originaltext]W:Goodevening,everybody.[5-1]Despiteeffortsfromallsides,
[originaltext]W:Goodevening,everybody.[5-1]Despiteeffortsfromallsides,
[originaltext]W:Goodevening,everybody.[5-1]Despiteeffortsfromallsides,
随机试题
(1)Ah,praise.Sopowerfularesimplewordsofapprovalandadmirationthat
ThepeopleoftheUSAhavebeenopposedtoacentralizedgovernmentsincelo
ETF申购赎回中的现金替代不包括以下哪种类型?()A.必须现金替代 B.现金
同一劳动在同一时间内,当部门劳动生产率提高时会使( )。A.单位商品的价值量降
被宣告缓刑的犯罪分子,在缓刑考验期限内( ),应当撤销缓刑。 A.违反法律、
人民法院受理支付令申请后,经审查债权人提出的事实、证据,认为债权人的申请不符合
双侧髁突骨折后出现髁突明显移位伴开的合理治疗方法是A.单侧固定+颅颌弹性绷带
因第三者对保险标的的损害而造成保险事故的,保险人自()之日起,在赔偿金额范围内
等额分付资本回收系数记为()A.(F/A,i,n) B.(A/F,i,n)
在投资控制动态过程中,应着重做好的工作有()。A.对计划目标值的论证和分析
最新回复
(
0
)