首页
登录
职称英语
When was the first actual radio broadcast made? [br] [originaltext] It was a
When was the first actual radio broadcast made? [br] [originaltext] It was a
游客
2023-11-02
58
管理
问题
When was the first actual radio broadcast made? [br]
It was an Italian inventor who created the first wireless device for sending 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.(14)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 of two short musical selections, a poem and a brief holiday greeting. The broadcast was heard by wireless operators on ships with a radio through several hundred miles.(15)The following year, De Forest began regular radio broadcasts in New York. These programs were similar to much of what we hear on the radio today in that De Forest played only music. But because there were still no home radio receivers, De Forest’s audience consisted of only 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?(16)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 1920’s that someone envisioned mass appeal for radio.(17)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
语义理解题。根据句(16)可知,只有那些喜爱无线电的人才有接收机。因此B为正确答案。
转载请注明原文地址:https://www.tihaiku.com/zcyy/3151846.html
相关试题推荐
Whatarethemanandthewomanmainlydiscussing?[br][originaltext]W:Hi,Jim
Whatarethemanandthewomanmainlydiscussing?[originaltext]W:Hi,Jim.What
Themandoesn’twanttogotouniversitybecause______.[br][originaltext]W:A
Themandoesn’twanttogotouniversitybecause______.[br][originaltext]W:A
Whatcanwelearnaboutthewoman?[br][originaltext]M:So,(l-l)haveyoufo
WhichofthefollowingdidNOTlaunchthe"roadmap"planin2003?[originaltext
WhatdoesthemanwanttoknowfromJessica?[br][originaltext]M:Hi,Jessica!
WhatdoesthemanwanttoknowfromJessica?[br][originaltext]M:Hi,Jessica!
WhatdoesthemanwanttoknowfromJessica?[originaltext]M:Hi,Jessica!Didy
Whatkindofaccommodationdoesthewomanneed?[originaltext]M:Goodmorning.C
随机试题
Ifnoonetakesthe______andplansforthetrip,wewillneverleavehome.A、init
Seekingtobuildsupportamongblackfamiliesforitseducationreformlaw,
______seriouslyill,yououghttogobacktoseeher.A、AsyourmotherisB、Your
D
测量不确定度表述的是测量值之间的()。A.差异性 B.分散性 C.波动性
以下不属于法码界定的有效市场分类类型的是( )。A.半弱有效市场 B.弱有效
温家宝总理在第二届中国—亚欧博览会开幕式暨中国—亚欧经济发展合作论坛上发表题为《
患者女,青年。有溃疡反复发作的病史10年,每次发作溃疡少于5个,症状轻,可以自行
当事人双方为了担保债务的履行,约定由当事人一方先行支付给对方一定数额的货币作为担
它广泛用于电力、冶金、机械、化工和硅酸盐等工业的各种热体表面及各种高温窑炉、锅炉
最新回复
(
0
)