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
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、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://www.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
[originaltext]W:George,doyouhaveanyideatoimproveourbrandimage?M:O
Oneofthemostcommonhumanfearsisscarcity.Manypeopleareafraidofno
[originaltext]M:ItsaysherethatyougraduatedfromUniversityofPennsylvani
男,36岁,常在饭后半小时中上腹疼痛,伴饱胀、嗳气、反酸、食欲减退。假如突然腹痛
试讲题目:画 内容: 远看山有色,近听水无声. 春去花还在,人来鸟不惊。
既能治疗风湿痹痛,又能治疗诸骨鲠咽的药物是A.五加皮B.桑寄生C.木瓜D.羌活E
原发性肝癌晚期常见的并发症不包括A.肝癌结节破裂出血 B.肝性脑病 C.上消
患者男,35岁。10月10日因胆结石收入院,在院期间饮食、作息、排泄均正常,手术
下面文段中“共同的边界”所指应是()。把数学和语言学这两门差别悬殊的学科联系
简答职能制结构的不足。
最新回复
(
0
)