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
29
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:https://tihaiku.com/zcyy/3209699.html
相关试题推荐
Oftentimeswhenwecry,wefeelalumpinthethroat.Doesalumpactual
Oftentimeswhenwecry,wefeelalumpinthethroat.Doesalumpactual
Oftentimeswhenwecry,wefeelalumpinthethroat.Doesalumpactual
Oftentimeswhenwecry,wefeelalumpinthethroat.Doesalumpactual
Oftentimeswhenwecry,wefeelalumpinthethroat.Doesalumpactual
Howmanyattacksandclasheswerereportedinthisnews?[originaltext]Atta
Accordingtothecourtruling,Israelhasto[br][originaltext]TheInterna
Accordingtothecourtruling,Israelhasto[originaltext]TheInternational
Wheredoesthisconversationmostlikelytakeplace?[originaltext]M:Hello.May
Whatisthemaintopicofthisconversation?[br][originaltext]M:Weseemtob
随机试题
Thesechildrenlookedverynervousand______whentheywereonsuchabigstage
A、Georgefeltangryatthebird.B、Georgewasproudofthisbird.C、Georgewasq
罗夏墨迹测试属于投射测试中的()。A.联想法 B.构造法 C.绘画法 D
如图14所示变截面受扭圆杆的应变能的值为()。
迭代思维,大数据思维,平台思维……关于互联网思维的众多阐释尤其是实践心得,都有价
水利工程中,广义上的土分为( )级。A.4 B.8 C.12 D.16
“春秋五霸”中,最早称霸的是()。A.秦穆公B.晋文公 C.齐桓公D.
(2019年真题)甲省乙市政府拟将本市的环境资源管理局与国土资源局合并,应当报哪
案例八: 一般资料:求助者,男性30岁,公司职员 案例介绍:求助者原计划在四
表示某地1995年5种不同类型病毒性肝炎发病人数占病毒性肝炎发病总人数的比重,宜
最新回复
(
0
)