首页
登录
职称英语
Why were early radio broadcasts heard by such a small audience? [br] [originalt
Why were early radio broadcasts heard by such a small audience? [br] [originalt
游客
2024-10-26
27
管理
问题
Why were early radio broadcasts heard by such a small audience? [br]
It was an Italian inventor who created the first wireless device for setting 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 with two short musical selections of poem and brief holiday greeting. The broadcast was heard by wireless operators on ships with a radio through several hundreds miles. The following year, De Forest began regular radio broadcasts in New York. These programs Were similar to much what we hear on radio today. In that, De Forest played only music. But because there were still no home radio receivers, De Forest’s audiences consisted only of 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? Hmm, 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 1920s 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
转载请注明原文地址:https://tihaiku.com/zcyy/3818581.html
相关试题推荐
Whatisthenewsmainlyabout?[br][originaltext]AnIndonesianferrypacked
Whatisthenewsmainlyabout?[originaltext]AnIndonesianferrypackedwith
WhichofthefollowingisNOTmentionedinthefollowingnews?[originaltext]
WhohadtoleavetheGazaStripandtheWestBank?[br][originaltext]Israe
Accordingtothetalk,theownerofabikehasto______.[originaltext]Hell
WhichofthefollowingisNOTneededfortheLostPropertyForm?[originaltext]W
Whatisthepurposeofthenationalsurvey?[br][originaltext]Chinesegove
WhywerethefishingcrewstrandedonOct.10th?[originaltext]Elevenfishin
PeoplechooseLondonforpost-Christmasshoppingbecause______.[br][originalt
PeoplechooseLondonforpost-Christmasshoppingbecause______.[br][originalt
随机试题
IthasrecentlybeenannouncedthatanewrestaurantmaybebuiltInyourneighb
PoliticalchangesinEasternEuropeandtheformerSovietUnionhavereduced
对开采工艺——爆破环节描述不正确的是( )。 (1)某采矿场爆破后出现盲炮,
对于特殊或重要的建(构)筑物,必须按构成单位工程的主要分部分项工程编制,必要时结
以下关于风险的表述错误的是()。A.风险表现为给投资者带来的损失 B.风险是
王萍今年16岁,出生在广东省一个偏僻的小山村,现为北京某打工子弟学校初二学生。
某股票期权距到期日时间为2年,股票年收益率的标准差为0.16,且保持不变。则采用
甲面粉加工厂为了满足市场需求,提高生产能力,决定对原厂房进行扩建,委托具有相应资
(2019年真题)关于专业工程分包人责任和义务的说法,正确的是( )。 A
以下关于综合成本分析方法的表述中,正确的是()。A.进行分部分项工程成本分析时
最新回复
(
0
)