首页
登录
职称英语
[originaltext] It was an Italian inventor who created the first wireless dev
[originaltext] It was an Italian inventor who created the first wireless dev
游客
2024-02-01
42
管理
问题
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.
Questions 22 and 25 are based on the passage you have just heard.
22. When was the first actual radio broadcast made?
23. Where did De Forest begin regular radio broadcasts?
24. Who had receivers in the early days of radio?
25. What did David Sarnoff predict about radios?
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。根据录音“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。故选项D为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3411867.html
相关试题推荐
[originaltext]W:Tom,Iheardyoufailedthetennismatch.What’swrongwithyo
[originaltext]W:Tom,Iheardyoufailedthetennismatch.What’swrongwithyo
[originaltext]W:Tom,Iheardyoufailedthetennismatch.What’swrongwithyo
[originaltext]W:Tom,Iheardyoufailedthetennismatch.What’swrongwithyo
[originaltext]W:Ithinktheairinthecityisseriouslypolluted.Itishorri
[originaltext]W:Ithinktheairinthecityisseriouslypolluted.Itishorri
[originaltext]W:Ithinktheairinthecityisseriouslypolluted.Itishorri
[originaltext]W:Ithinktheairinthecityisseriouslypolluted.Itishorri
[originaltext]W:Ididn’texpectthedormitorytobesonoisy.Theremustbeso
[originaltext]W:Ididn’texpectthedormitorytobesonoisy.Theremustbeso
随机试题
【B1】[br]【B8】A、heatedB、burntC、equippedD、builtA由下文的内容和其中的heat一词可知此处论述的是太阳能的另
[originaltext]M:Thatisit.Iknowthatitissmallerthanyouwanted,butit
中国古典园林造园的独特要素是()。A.建筑 B.理水 C.动物、植物
个人经营贷款的还款方式中,比较常用的不包括()。A.银行受理,公积金管理中心审核
手提式灭火器宜设置在灭火器箱内或挂钩、托架上,其顶部离地面高度不应大于l.5m,
为了激励学生学习,帮助学生有效调控自己的学习过程,使学生获得成就感,周老师对本班
下列关于小额诉讼程序的说法,符合法律和司法解释规定的有:A.当事人可以协商确定小
关于法与道德的论述,下列哪些说法是正确的?A、法律规范与道德规范的区别之一就在于
A.免疫荧光法 B.免疫胶体金技术 C.对流免疫电泳 D.ELISA E
项目融资开展步骤是().A.融资决策分析→投资决策分析→融资结构设计
最新回复
(
0
)