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
2023-11-22
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、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/3209698.html
相关试题推荐
[originaltext]M:Goodmorning,everybody.[6-1]Studieshaveshownthatchildre
[originaltext]M:Goodmorning,everybody.[6-1]Studieshaveshownthatchildre
[originaltext]M:Goodmorning,everybody.[6-1]Studieshaveshownthatchildre
[originaltext]W:Goodafternoon,everybody.Amongthemistakesjournalistssome
[originaltext]W:Goodafternoon,everybody.Amongthemistakesjournalistssome
[originaltext]W:Goodevening,everybody.Automation,drivenbytechnologicalp
[originaltext]W:Goodevening,everybody.Automation,drivenbytechnologicalp
[originaltext]W:Goodevening,everybody.Automation,drivenbytechnologicalp
[originaltext]W:Goodevening,everybody.[5-1]Despiteeffortsfromallsides,
[originaltext]W:Goodevening,everybody.[5-1]Despiteeffortsfromallsides,
随机试题
Meetingscannotalwayssucceedinsolvingproblemsunderdiscussion.A、会议并非总能成功地
[originaltext]SentenceNo.1Australiahasmillionsofsheep.Theysaytherear
Sincethedawnofhumaningenuity(独创性),peoplehavedevisedevermorecunnin
采用成本法对在用低值易耗品评估时,成新率的确定应根据()确定,而不能完全按
某选修教材设置了“语言的艺术”选读专题,这一专题在《普通高中语文课程标准》(实验
流通蒸气灭菌法A.可使2ml安瓿3min内升温至140℃,呈现强杀菌效果 B.
在存货经济订货批量模型中,与经济订货量呈反方向变化的变量是( )。[2008年
在原始社会,当社会生产力还十分低下,人们的劳动所得除了维持人们自身的生存和繁衍外
3,5,8,13,20,()。 A.31B.33C.37D.44
在电子商务活动中,()是动机和目的。A.商流 B.物流 C.资金流 D.
最新回复
(
0
)