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
47
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、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
语义理解题。从“This was radio pioneer, David Sarnoff, who predicted that one day there would be a radio receiver in every home.”可知总有一天,每个家庭都将拥有无线电收音机。选项D为正确答案。
转载请注明原文地址:http://tihaiku.com/zcyy/3824267.html
相关试题推荐
Whenwasthefirstactualradiobroadcastmade?[br][originaltext]Itwasan
Whatarespeakersmainlydiscussing?[br][originaltext]M:Howdidyoulikeyes
Whatarespeakersmainlydiscussing?[originaltext]M:Howdidyoulikeyesterday
HowmanyelectoratesopposedtheEUconstitutioninFrench?[originaltext]Fre
Howmanyhijackersareinvolvedinthenews?[originaltext]Russiancommandos
Whatarethespeakersmainlydiscussing?[br][originaltext]W:DoctorWhite,we
Whatarethespeakersmainlydiscussing?[br][originaltext]W:DoctorWhite,we
Whatarethespeakersmainlydiscussing?[originaltext]W:DoctorWhite,werecen
Whatseemstosurprisethemanaboutthenewproduct?[br][originaltext]W:I’v
Whatseemstosurprisethemanaboutthenewproduct?[originaltext]W:I’vebeen
随机试题
[img]ct_epem_epelisv_01461(20097)[/img][br][originaltext]F:Wouldyoulikean
Ifyouexhibitpositivetraitssuchashonestyandhelpfulness,thechances
A.contraryB.exclaimedC.extensivelyD.affectedE.priorF.demandsG.soH.
A.riskB.plausibleC.ongoingD.sumE.stron
ShortStoriesisgoingtobepublishedsoon.Thisbookisdesignedtohelpb
图示结构A支座反力偶的力偶矩MA为: A.0 B.1kN*m,右侧受拉
足阳明胃经的起始穴是A.承泣 B.迎香 C.厉兑 D.隐白 E.内庭
下列关于软膏剂质量要求的叙述,错误的是A、用于创面的软膏剂均应无菌 B、软膏剂
贷款人发放二手车贷款的金额不得超过借款人所购价格的50%,贷款期(含展期)不得超
生产能力按其技术组织条件的不同,可分为()。A.设计生产能力 B.查定生产能
最新回复
(
0
)