首页
登录
职称英语
When was the first actual radio broadcast made? [br] [originaltext] It was an
When was the first actual radio broadcast made? [br] [originaltext] It was an
游客
2024-10-30
52
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. 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. 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? 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. 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。文中提到“For the simple fact that only a few people, in fact, only those who tinkered with wireless telegraphs as a hobby, owned receivers.”即原因很简单,只有那些喜爱无线电的人才有接收机。因此选项D为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3824266.html
相关试题推荐
Whatarespeakersmainlydiscussing?[br][originaltext]M:Howdidyoulikeyes
Whatarespeakersmainlydiscussing?[br][originaltext]M:Howdidyoulikeyes
Whatarespeakersmainlydiscussing?[originaltext]M:Howdidyoulikeyesterday
Howmanyhijackersareinvolvedinthenews?[br][originaltext]Russiancomm
Whatarethespeakersmainlydiscussing?[br][originaltext]W:DoctorWhite,we
Whatarethespeakersmainlydiscussing?[br][originaltext]W:DoctorWhite,we
Whatarethespeakersmainlydiscussing?[originaltext]W:DoctorWhite,werecen
Whatseemstosurprisethemanaboutthenewproduct?[br][originaltext]W:I’v
Whatseemstosurprisethemanaboutthenewproduct?[br][originaltext]W:I’v
RichpeopleinBritainhavebeenhuntingfoxes[br][originaltext]Foxesand
随机试题
Lookatthechartbelow.Itshowsacompany’sturnover,operatingprofitandmar
TheFlavorIndustryA.Readthroughthenutritionalinf
TherearedifferenttheoriesofLanguageDevelopment.Thelearningperspect
Completethenotesbelow.WriteONEWORDONLYforeachanswer.NotesonCustomer
Yoga,theancientpracticeofpostures,breathingandmeditation,isgainin
Cancomputerviruseseverbeaforceforprogress?Inthewildwestoftheo
产科病房母乳喂养的规定包括( )A.早吸吮 B.24小时同室 C.开奶前不喂
下列选项中,符合所给图形的变化规律的是:
白细胞朝着化学刺激物做定向移动的现象称为( )。A.白细胞趋化作用 B.白细
男,56岁。糖尿病患者,用胰岛素治疗,晚10时突起心慌、多汗、虚弱,继而神志不清
最新回复
(
0
)