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
2023-11-22
66
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、Military communications officers.
B、People who treated radio technology as a hobby.
C、People who lived in big cities.
D、People with an interest in music.
答案
B
解析
语义理解题。文中提到“For the simple fact that only a few people, in fact, only those who tinkered with wireless telegraphs as a hobby, owned receivers.”即原因很简单,只有那些喜爱无线电的人才有接收机。因此选项D为正确答案。
转载请注明原文地址:http://tihaiku.com/zcyy/3209698.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]W:Goodafternoon,everybody.Amongthemistakesjournalistssome
[originaltext]W:Goodafternoon,everybody.Amongthemistakesjournalistssome
[originaltext]W:Goodevening,everybody.Automation,drivenbytechnologicalp
[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,
随机试题
TheftdeterrentsystemTodeterthevehiclethe
Theteacherstoodwithhisbacktothe(11)onawintermorning.Hedecided
FreshwaterlifeitselfhasnevercomeeasyintheMiddleEast.EversinceT
关于折现现金流估值法,表述错误的是()A.企业自由现金流折现模型得到的是企业价
服务机构要想从政府、基金会获得经费支持,在项目申请书中要说明的内容有()。A.
下列关于避免利益冲突原则的表述,正确的有()。A.从业人员在执业过程中遇到相关
牙列缺失后,牙槽骨吸收速度的规律是A.健康者吸收慢 B.龋病较牙周病吸收快
经承包人催告发包人仍未在合理期限内支付工程价款的,建设工程承包人的工程价款就该工
某矿停产检修,根据检修计划安排,由供电车间负责对井下中央变电所三、四段母线进行检
某单位产品8月份成本相关参数如下表,用因素分析法计算,单位产品人工消耗量变动对
最新回复
(
0
)