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
2024-10-06
19
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:http://tihaiku.com/zcyy/3788766.html
相关试题推荐
S.KoreaSubwayArsoninjured[originaltext]Fireracedthroughtwosubwayt
Whywereearlyradiobroadcastsheardbysuchasmallaudience?[br][originalt
WhatbothersNancyaboutherneighbor’sson?[br][originaltext]W:Howareyour
WhatbothersNancyaboutherneighbor’sson?[originaltext]W:Howareyournewn
Whatisnottrueaboutthepatientmentionedinthebeginning?[br][originalte
Whatisnottrueaboutthepatientmentionedinthebeginning?[originaltext]F:
Nigeria’selectionwas______accordingtomostforeignobservers.[originaltext
Whatdoesthespeakersayabouttheskinofstarfish?[br][originaltext]Wel
Whatdoesthespeakersayabouttheskinofstarfish?[br][originaltext]Wel
Whatdoesthespeakersayabouttheskinofstarfish?[originaltext]Welcomet
随机试题
ThelongestriverinCanadais______.A、theSevenB、theYukonC、theMackenzieD、
[audioFiles]2021m5x/audio_ve01005j_ezflisteningxa_0103_202105[/audioFiles]
Thiscoursepreparesnon-nativespeakersfortheinternationallyrecognizedF
A—SupplyagreementB—TradeagreementC—Long-termcontract
特别行政区享有其他省、自治区、直辖市所没有的独有权力。特别行政区的各类法的形式,
蛋白质生物合成中氨基酸的活化部位是()A.烷基 B.羟基 C.羧基 D
药师的职业道德准则不包括A.掌握最优专业知识和技术B.为药学职业带来信任和荣誉C
某公司从澳大利亚进口一批羊毛,在韩国转船后运抵我国,报检不需提供()。 A.
2020年7月,甲公司当月应发工资1560万元,其中:生产部门生产工人工资100
完成某单位分部分项工程需要基本用工4.2工日,超运距用工0.3工日,辅助用工1工
最新回复
(
0
)