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
16
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] 【B4】
选项
答案
screen
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3444725.html
相关试题推荐
[originaltext]TodayI’dliketomentionaninterestingtelevisionprogramt
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
Childrenmodelthemselveslargelyontheirparents.Theydoso【1】throughide
Childrenmodelthemselveslargelyontheirparents.Theydoso【1】throughide
Childrenmodelthemselveslargelyontheirparents.Theydoso【1】throughide
Childrenmodelthemselveslargelyontheirparents.Theydoso【1】throughide
Childrenmodelthemselveslargelyontheirparents.Theydoso【1】throughide
随机试题
Northernlightsisthenameofalightphenomenonoftenseeninthenorthern
ThemainreasonforAngela’stripwasto________.[br][originaltext]M:Andtod
Idon’tthinkthatJohnwillbeabletowinthegoldmedalattheOlympicGames,
某投资者在2月份以500点的权利金买进一张执行价格为13000点的5月恒指看涨期权,同时又以300点的权利金买入一张执行价格为13000点的5月恒指看跌期
卷材防水层的施工质量检验数量,应按铺贴面积每()㎡检查一处,每处()㎡且不得
某工程现场φ25mmHRB400钢筋的焊接采用闪光对焊方式,检测结果见右表。请你
某商品商位生产成本为200元,成本加成率为20%,采用成本加成定价法确定的该商品
某基础工程在一个施工段上的土方开挖量为500m3,该工作的产暈定额为2m3/人*
城市的特色与风貌体现在()两个方面。A.社会环境和物质 B.社会环境和自然
苦凉有毒,能祛风除湿、杀虫解毒,治麻风、腰带疮的药物是A.桑枝 B.川乌 C
最新回复
(
0
)