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
32
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
UnitTestingandComponentTesting--Asoftwareunitrepresentsasmallunitof
Nottoomanydecadesagoitseemed"obvious"bothtothegeneralpublicand
TypesofClimateClimateisthecombinationoftem
药物治疗不稳定型心绞痛下列哪项不正确?()A.氯吡格雷 B.β受体阻滞剂
下列关于隧道支护的说法,正确的是()。A.喷射混凝土分为干喷和湿喷现基本采用干喷
房屋产权人甲某,委托房地产中介服务机构丙公司将其房屋一次性出租,经丙公司联系
肺炎链球菌肺炎X线检查的表现是()A.早期可见病变部位的密度均匀影 B.
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
(2018年5月)培训实施体系包括()A.内培 B.课堂培训 C.拓展培训
我国工资、薪金所得,适用的个人所得税税率为()。A、3%~35% B、3%~4
最新回复
(
0
)