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
2023-07-11
33
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] 【B6】
选项
答案
motions
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2828461.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
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
The【B1】______ofclosed-circuittelevisionandothernewelectronicteaching
Childrenmodelthemselveslargelyontheirparents.Theydoso【1】throughide
Childrenmodelthemselveslargelyontheirparents.Theydoso【1】throughide
Childrenmodelthemselveslargelyontheirparents.Theydoso【1】throughide
随机试题
HemadegreatachievementsincollectingScottishfolksongswhichalsoserved_
Thecinemahaslearnedagreatdealfromthetheateraboutpresentation.Gon
感光材料的感光性能不包括A.灰雾度 B.感光度 C.反差系数 D.最大密度
(2020年真题)企业产成品成本中的原材料总额可用“材料价格×材料消耗数量”计算
考察企业资产偿债能力时,易于立即变现、具有即时支付能力的指标是()。A.速动
下列溶剂中毒性大但溶解性能广泛的是A.液状石蜡 B.二甲基亚砜 C.丙二醇
A.0B.1C.2D.3
甲到乙家做客,离去时将提包遗忘在乙家。乙翻看提包,发现里面还有1万元现金。乙将提
在下列各项中,不属于可控成本基本特征的是()。A.可以预计 B.可以计量
在拟建项目总图布置各种方案比选论证后,应编制总平面布置图,在总平面布置图上应标
最新回复
(
0
)