首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Why were early radio broadcasts heard by such a small audience?
Why were early radio broadcasts heard by such a small audience?
admin
2010-02-17
92
问题
Why were early radio broadcasts heard by such a small audience?
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、Few people owned the necessary equipment.
B、The music selection was not very popular.
C、Few ships came into New York harbor.
D、The radio signal was too weak to reach a mass audience.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/vB9K777K
0
专业英语四级
相关试题推荐
LittleJohnniereally________hisfather;theybothhaveblueeyes,brownhairandabroadforehead.
Californiaisalandofvarietyandcontrast.Almosteverytypeofphysicallandfeature,shortofarcticicefieldsandtropica
Amajorreasonforconflictintheanimalworldisterritory.Themaleanimal【C1】______anarea.Thesizeoftheareais【C2】____
Amajorreasonforconflictintheanimalworldisterritory.Themaleanimal【C1】______anarea.Thesizeoftheareais【C2】____
Itisoftenclaimedthatnuclearenergyissomethingwecannotdowithout.Weliveinaconsumersociety,wherethereisanenor
UnemploymentMostpeoplearemuchmorefrightenedbybeingunemployedthantheyneedtobe./Beingunemployedcertainlyha
Dr.SheelerwassurprisedatMr.Nelson’scallbecause______.
Whyisthemannotreallysurprisedthathisparentsaremoving?
Whywereearlyradiobroadcastsheardbysuchasmallaudience?
3.______wehaveachievedisattributedtotheguidanceofourparents.
随机试题
在使用如图所示FX2N系列PLC控制交通灯时,Y000接通的时间为()。
用数控铣床铣削一直线成形面轮廓,确定坐标系后,应计算零件轮廓的(),如起点、终点、圆弧圆心、交点或切点等。
教学过程中强调教师的主导作用势必会降低学生的主体地位。
影响肺部气体交换的主要因素不包括
矽肺诊断所必备的条件是
下列劳动争议中,仲裁裁决为终局裁决的是:()
若某单元格中公式的计算结果应为一个大于0的数,但却显示出以下信息“#####”,使用()的操作可以将数据完全显示出来,又不影响该单元的内容。
有关投资性房地产的说法正确的是()。[2013年6月真题]Ⅰ.采用公允价值对投资性房地产进行后续计量的企业,有证据表明,当企业首次取得某项非在建投资性房地产时,该投资性房地产公允价值不能持续可靠取得的,应当对该投资性房地产采用成本模式
旅游主管部门向上级主管部门报告旅游突发事件的内容应当包括()。
去年二月,我【131】了在上海的学习生活。最初的日子让我感到迷茫:对家人的【132】,学习中的困难,听不懂的方言,没有朋友的孤独等等,让我对上海【133】了陌生感。【134】有一天晚上我在外面借酒消愁,喝了很多,结果醉得路也走不动了,就【135】留学生宿
最新回复
(
0
)