首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Why were early radio broadcasts heard by such a small audience?
Why were early radio broadcasts heard by such a small audience?
admin
2013-11-10
27
问题
Why were early radio broadcasts heard by such a small audience?
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://kaotiyun.com/show/riGK777K
0
专业英语四级
相关试题推荐
Angerisanemotionthatcanbehardtocontrol.【C1】_____this,weshouldlearnhowtomanageangerinaconstructivemanner.In
SeeingtheGeneralcominghisway,thesoldierstoppedandgavehimasmart_______.
______thattheymayeventuallyreducetheamountoflaborneededonconstructionsitesby90percent.
Asmyexamsarecomingnextweek,I’lltakeadvantageoftheweekendto______onsomereading.(2004年考试真题)
Who______wascomingtoseemeinmyofficethisafternoon?(2003年考试真题)
______youwerecomingtoday,I’dhavemetyouattheairport.
Doeseverybodyontheearthhaveanequalright______anequalshareofresources?
Accordingtothespeaker,"LoveThyNeighbor"shouldoriginallybe______.
AsimplepieceofropehangsbetweensomeenvironmentallyfriendlyAmericansandtheirneighbors.Ononesidestandthosewhoha
Accordingtothenews,Francewasstronglycriticizedfor______.
随机试题
由凸圆弧与凸圆弧连接组成的曲线型面应先加工半径___________的凸圆弧面。
斑秃的形成多由于
患者,男性,66岁,因心房纤维颤动入院,护士在测脉搏前推断患者的脉搏最可能为
限制进口的手段包括()等。
通用固定资产核算软件的卡片样式一般不能由用户自己定义。()
由于ETF和LOF可在二级市场上进行交易,它们的折(溢)价幅度会相对较小。()
下列金融犯罪中,其主观方面不是故意的是()。
关于蓝海战略下列说法中正确的有()。
李某因为缴纳税款数额的问题和税务机关发生争议,依据我国《行政复议法》和《行政诉讼法》的规定,李某可以寻求的解决途径是()。
JohnCiardigothismaster’sdegreefromtheUniversityofMichiganin1939andhaspublishedmorethan40poems.
最新回复
(
0
)