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
34
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、They would get smaller in size.
B、Their signals would travel further.
C、They would become less popular than television.
D、They would be common household items.
答案
D
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3818582.html
相关试题推荐
Thebuildingwasdestroyedby______tendaysago.[br][originaltext]Indi
Thebuildingwasdestroyedby______tendaysago.[br][originaltext]Indi
Thebuildingwasdestroyedby______tendaysago.[originaltext]India-Work
Altogetherhowmanypeoplewereinjuredduringtheviolence?[br][originaltext
Altogetherhowmanypeoplewereinjuredduringtheviolence?[originaltext]A
WherewasthefirsttelephoneserviceinAmericaestablished?[br][originaltex
WhichofthefollowingwasNOTanelectionyear?[br][originaltext]Anele
WhichofthefollowingwasNOTanelectionyear?[br][originaltext]Anele
ThespeakerstatesthattheStoneAgewassonamedbecause______.[originaltext
Whatisthemainpurposeoftheconversation?[br][originaltext]M:Hello.Ine
随机试题
SUPACARSPLCNotesonNewRegentModel
WhyWeAreTouchedByTheSoundofMusicFromsimplefolk
Youthisnotamatteroftimebutamatterofself-improvement,bothphysical
[originaltext]Somepeoplethinkthatthebesttimetobeginstudyingaforei
在一个分布式软件系统中,一个构件失去了与另一个远程构件的连接。在系统修复后,连接
关于急性上消化道大出血的急救处理措施,哪项是正确的A.保持呼吸道通畅 B.补充
《工程建设项目招标投标活动投诉处理办法》规定,投诉人投诉时,应当提交投标书。投标
期货公司客户可以通过()等委托方式下达交易指令。A:书面 B:计算机
赵某因涉嫌走私国家禁止出口的文物被立案侦查,在此期间逃往A国并一直滞留于该国。对
在前锋线比较法中工作实际进度点位置在检查日时间坐标左侧,则两者之间的差值表示(
最新回复
(
0
)