首页
登录
职称英语
The idea of television, transmitting pictures through the air or over wires,
The idea of television, transmitting pictures through the air or over wires,
游客
2024-02-12
37
管理
问题
The idea of television, transmitting pictures through the air or over wires, has been around since the late 19th【B1】______. But it wasn’t until 1925, when J. L. Baird, a Scottish【B2】______. became the first to electrically transmit moving pictures, that television became a【B3】______.
Baird’s first television was a mechanical system consisting of several moving parts. It had a small【B4】______ onto which pictures were transmitted 10 times per second at 30 lines of resolution (分辨率). With the help of a photoelectric cell (光电管), bright and dim light were【B5】______ into an electrical signal and sent via radio waves. In June 1925, Baird transmitted the【B6】______ of a human face, winking and smiling from one room of the laboratory to another, without the aid of【B7】______ or wires. Television truly came into its own in the 1930s with the advent of the cathode-ray tube (阴极射线管), which allowed for electronic line-by-line scanning of【B8】______. With the help of the Radio Corporation of America and an improved cathode-ray tube, the first all-electronic TV was demonstrated in 1932.【B9】______.
As television’s evolution continues, high-definition (分辨率) digital TV is supposed to replace today’s 625-1ine sets with 1,050 or more lines of resolution.【B10】______. This trend has developed very fast.【B11】______. [br] 【B8】
选项
答案
images
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3444729.html
相关试题推荐
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
Childrenmodelthemselveslargelyontheirparents.Theydoso【1】throughide
Childrenmodelthemselveslargelyontheirparents.Theydoso【1】throughide
随机试题
The100AkerWoodmaylooklikeadark,forbiddingplacethesedaysforMich
Theresearchersfoundtheageatwhichyoungpeoplefirstfall______tobulliess
Whatisthemostappropriatetitleforthepassage?[br][originaltext]Ine
[originaltext]W:Goodmorningandwelcometotoday’sprogram.Haveyoualwaysw
ThePeakTimeforEverythingA)Could
[originaltext]HurricaneLililashedtheCaribbeanislandsofLittleCaymana
消防水泡的形式不包括()。A.手动式 B.电控式 C.电-粉控式 D.电
2020年11月,经统计可知,北京轨道交通路网运营线路达23条,总里程699.3
青少年福利政策宣传,属于()层面的青少年社会工作。A.系统 B.中观
在中共八大上作政治报告的是 A.毛泽东B.刘少奇 C周恩来D.邓小平
最新回复
(
0
)