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
26
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/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
TherecanbenodoubtthattheemergenceoftheNegrowriterinthepost-war
Whenshoppingonline,itisimportanttobearafewbasicrulesinmind.Not
[originaltext]1.ThedepartureofFlight007toHonoluluhasbeendelayedbytw
[originaltext]PresidentBushsaidThursdayitisunrealistictoexpectNATO
A、Ithasapopulationof5,000people.B、Itspillarindustryistourism.C、Itsr
改错题:改正句子中的错误。(本题24分) (1)这种产品具有抗紫外线、抗摩擦、
下列关于金融现货交易和金融期货交易结算方式的区别说法正确的是()。A.金融期货
《中华人民共和国国民经济和社会发展第十二个五年规划纲要》指出,今后五年,要确保科
A.虫蛀 B.霉变 C.挥发 D.沉淀 E.酸败合剂在贮藏中易
( )是海关对自中华人民共和国境外港口进入境内港口的船舶所征收的一种税。A.关税
最新回复
(
0
)