首页
登录
职称英语
[originaltext] CATV is a short way of saying "community antenna television."
[originaltext] CATV is a short way of saying "community antenna television."
游客
2023-07-08
49
管理
问题
CATV is a short way of saying "community antenna television." But "cable television" is the term most people use. Cable television allows viewers to receive TV programs that they cannot pick up with their regular antennas.
Television signals do not follow the curve of the earth. They travel in straight lines in all directions. Signals from a TV station move toward the horizon and then go into space. If you live only a few miles from a station, you may not get any picture at all.
CATV began in 1948. People in places far from TV stations shared the cost of putting up high antennas. A community antenna was usually placed on a hill, a mountain, or on a high tower. The antenna picked up TV signals and fed them into a small local station. From the station, thick wires called cables ran out to nearby homes. Each person using the cable paid a monthly charge.
CATV worked well, and soon new uses were found for it. Local stations could feed programs into empty channels that were not in use. People along the cable could have local news, weather reports, and farm and school news at no extra charge.
Today, cable television has moved into cities. It brings in extra programs that city viewers with regular antennas cannot see. It is also used in many classrooms throughout the country.
16. What does the speaker say about television signals?
17. What should people do if they used the cable?
18. What happens after cable television has moved into cities?
选项
A、All classrooms use cable television.
B、City people can see extra programs.
C、The charge of cable is much lowered.
D、TV signals can be received more easily.
答案
B
解析
短文提到,有线电视进入城市后,给城市观众带来了普通天线无法提供的额外节目,故B正确。
转载请注明原文地址:http://tihaiku.com/zcyy/2819589.html
相关试题推荐
[originaltext]Ifyou’refindingittoughtolandajob,tryexpandingyour
[originaltext]Ifyou’refindingittoughtolandajob,tryexpandingyour
[originaltext]Ifyou’refindingittoughtolandajob,tryexpandingyour
[originaltext]Nooneknowsexactlyhowmanydisabledpeoplethereareinth
[originaltext]Nooneknowsexactlyhowmanydisabledpeoplethereareinth
[originaltext]M:(22)Thegraduationiscoming.Ihavetofindajob,butIreall
[originaltext]M:(22)Thegraduationiscoming.Ihavetofindajob,butIreall
[originaltext]M:(22)Thegraduationiscoming.Ihavetofindajob,butIreall
[originaltext]W:Excuseme,Professor.Wouldyoupleasesparemeafewminutes
[originaltext]M:Igota"C"againinthemathsexam.WhatdoyouthinkIshoul
随机试题
[originaltext]InJapan,therearespecialplaygroundsfortheelderly.InI
Thepresidentsaysheintendstoworkwiththenomineetobuilduptheimageof
【S1】[br]【S6】A、providesB、attributesC、absorbsD、attachesA词义辨析题。空格所在句的意思是:适当喝些
AIDS(AcquiredImmuneDeficiencySyndrome)isafataldiseasethatdestroys
一个拥有5万人口的城镇,以往每年夏秋季节发生霍乱病例30例左右,今年夏秋季发生了
检测机构等级评定技术能力评审时,查阅检测报告应不少于()可选参数。A.5%
一种汇率通常有( )位有效数字。A.3 B.4 C.5 D.
“医乃仁术”是指A.道德是医学的本质特征 B.道德是医学活动中的一般现象
(2020年真题)下列计入总价措施项目的是()。A.垂直运输费 B.施工
机械设备安装工程中,生产线的纵、横向中心线以及主要设备的中心线应埋设()的
最新回复
(
0
)