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
48
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] 【B1】
选项
答案
century
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3444722.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
GallaudetUniversitycurrentlydoesnotallowstudentstokeeppetsinthei
[originaltext]M:What’reyoudoingupsoearly,Amanda?Haveyoudecidedtotak
Femi,martinandJamescatchtrainstogotothesamedestination.Femicatches
Everylivingthinghaswhatscientistscallabiologicalclockthatcontrols
[originaltext](9-1)ArecentInternationalLaborOrganizationreportsaysthe
There’snoquestionthattheEarthisgettinghotter.Therealquestionsare
银行代企业支付的水电费,银行已入账,企业未收到通知,未入账。如采用补记法制调节表
某工程为引水式电站,压力管道采用沿山坡布置的钢衬钢筋混凝土管,在进行钢衬钢筋混凝
关于借款合同的填写和审核,下列说法错误的是()。A.合同填写必须做到标准、规范
复发性阿弗他溃疡是最常见的口腔黏膜病,其患病率可高达A.10% B.20%
最新回复
(
0
)