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
2023-11-20
54
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/3204019.html
相关试题推荐
Howmanyattacksandclasheswerereportedinthisnews?[br][originaltext]
WhatdoesthenewssayaboutthepresidentialelectioninIndonesia?[originalte
Accordingtothecourtruling,Israelhasto[originaltext]TheInternational
Wheredoesthisconversationmostlikelytakeplace?[br][originaltext]M:Hell
[originaltext]LetChildrenLearntoJudgeTheirOwn
______werereportedbytheweatherstationinChicago.[br][originaltext]
______werereportedbytheweatherstationinChicago.[br][originaltext]
______werereportedbytheweatherstationinChicago.[originaltext]Onthe
Howmanycarsaretowedfromthestreetseachyear?[br][originaltext]One
Howmanycarsaretowedfromthestreetseachyear?[br][originaltext]One
随机试题
InJanuary1989,theCommunityofEuropeanRailwayspresentedtheirproposal
标准编号为GB50290-2014是()。A.组合钢模板技术规范 B.土工合
《建筑法》规定,建筑施工企业应当建立健全劳动安全生产教育培训制度。
证券发行人不包括()。A.政府及其机构 B.企业(公司) C.金融机构
因环境污染损害赔偿提起诉讼的时效期间为()年。A、1 B、2 C
据估算,目前我国农村生活垃圾每年产生量已在1.5亿吨左右,其中有一半以上未作任何
某社会工作服务机构在开展老旧社区治理项目时,发现一些高龄老人家中还在使用“蹲厕”
最常用于治疗肾病综合征的细胞毒药物是A.长春新碱 B.硫唑嘌呤 C.环磷酰胺
何首乌的药用部位为()。A.根 B.根茎 C.根及根茎 D.块根
根据《建设工程工程量清单计价规范》(GB50500-2008),天棚抹灰工程量计
最新回复
(
0
)