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
42
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] 【B5】
选项
答案
translated
解析
转载请注明原文地址:http://tihaiku.com/zcyy/3444726.html
相关试题推荐
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
Childrenmodelthemselveslargelyontheirparents.Theydoso【1】throughide
随机试题
PakistaniandU.S.officialshaveformallysignedanagreementbeforethey_____
Whatarethereinoursocietynowadays?Thereare______.[br][originaltext]
Accordingtoahandfulofstudies,anamenotonlyrevealscluesaboutaper
【教学过程】 (一)导入新课 【教师展示】多媒体播放蒙古族人民正在庆祝丰收,举办了盛大的篝火晚会,所有人都围绕篝火载歌载舞的场景。 【提出问题】请同
根据《水利工程设计概(估)算编制规定》,人工预算单价计算方法将人工划分为()。A
发生凝集反应的抗原应是A:载体B:可溶性抗原C:明胶D:抗原或抗体致敏的载
利用网络获取房地产经纪信息主要通过()途径。A.利用客源数据库收集信息 B
英国甲公司与北京乙公司在北京朝阳签订中央空调买卖合同,英国甲公司在中国没有住所,
下列关于实际执行的重要性的说法中,错误的是()。A.注册会计师在计划审计工作时
下列关于以公允价值计量且其变动计入当期损益的金融负债会计处理的表述,正确的有(
最新回复
(
0
)