首页
登录
职称英语
What is the topic of the passage? [br] [originaltext] Some people say radio
What is the topic of the passage? [br] [originaltext] Some people say radio
游客
2024-10-14
1
管理
问题
What is the topic of the passage? [br]
Some people say radio was invented by Guglielmo Marconi of Italy. Marconi sent the first radio communication signals through the air in eighteen ninety-five. In fact, no one person can be called the inventor of radio. Many people, including several Americans, helped to develop radio.
De Forest developed some of the technology used in early radio. During his lifetime, he invented hundreds of devices that were used in telephones, shortwave radio broadcasts, and similar technology. His most famous invention was the vacuum tube, or electron tube. In nineteen-O-six, the electron tube was considered the single most important development in electronics. The device made it possible to strengthen radio signals and to send them over long distances. It was a major reason for the fast growth of the electronics and communications industries in the early part of the twentieth century.
Edwin Armstrong was another American inventor who was important in the development of electronics and radio communication. Armstrong developed technology that helped to improve radio reception. He discovered ways to limit unwanted radio signals. Edwin Armstrong also was a leader in using radio to reproduce sounds clearly. This process became known as frequency modulation, or FM radio. FM radio provided better sound reproduction and less noise or interference than traditional AM radio. Armstrong also developed radio receivers that became widely used.
选项
A、Developing technology to improve radio reception.
B、Discovering innovative ways to limit radio signals.
C、Using radio to produce sounds clearly.
D、Pioneering in communications industries.
答案
A
解析
细节题。从“Armstrong developed technology that helped to improve radio reception.”可知。
转载请注明原文地址:https://tihaiku.com/zcyy/3800351.html
相关试题推荐
WhatcanWeinferfromMr.HunSen’swords?[originaltext]CambodianPrimeMi
MostoftheOlympicsceremoniesareto______.[br][originaltext]TheOlymp
HowdidtheEnglishChannelcomeintobeing?[br][originaltext]W:Tom,doyou
Whatdoyouknowaboutthewomanspeaker?[br][originaltext]W:Hello,Stall.C
Whatdoyouknowaboutthewomanspeaker?[br][originaltext]W:Hello,Stall.C
Wheredidthestormsfirststrike?[br][originaltext]About100peoplear
Themuseumaimsmainlytodisplay______.[br][originaltext]Goodmorning,
Themuseumaimsmainlytodisplay______.[br][originaltext]Goodmorning,
WhatdidpeopleinEgyptsearchforyears?[br][originaltext]Foryearspe
WhatdidpeopleinEgyptsearchforyears?[br][originaltext]Foryearspe
随机试题
Takingapagefromsciencefiction,engineersattheNationalAeronauticsan
Receivingvisitorsandguestsisanimportantpartofthesecretary’sdaily
Everyyearalargenumberofyoungpeopleleaveschoolandbeginwork.Some【
桑塔纳2000GLS型轿车JV型发动机分电器触发叶轮的叶片在空隙时,霍尔传感器信
Thechangeinthatvillagewasmiraculou
医疗机构对使用麻醉药品非注射剂型的患者应A:每2个月复诊或随诊一次 B:每3个
患者男.56岁。因胸闷、咳嗽、咳痰、呼吸困难、尿少就诊,既往有风湿性心脏病二尖瓣
在新中国成立初期对资本主义工商业的调整中,下列不正确的是()A.以调整公私关系
某地上百居民因城市改造拆迁补偿问题到市政府周围聚集,高呼口号,打横幅,持续一天还
情感领域的教学目标包括())。A.接受 B.反应 C.形成价值观念 D.组
最新回复
(
0
)