首页
登录
职称英语
What does the speaker say about television signals? [br] [originaltext] CAT
What does the speaker say about television signals? [br] [originaltext] CAT
游客
2023-07-25
51
管理
问题
What does the speaker say about television signals? [br]
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.
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:https://www.tihaiku.com/zcyy/2868204.html
相关试题推荐
[originaltext]Whencarsfirststartedappearingonthestreetsoftheworld
[originaltext]Whencarsfirststartedappearingonthestreetsoftheworld
[originaltext]M:Howareyournewneighbors,Nancy?W:Theyseemniceenough,b
[originaltext]M:Howareyournewneighbors,Nancy?W:Theyseemniceenough,b
[originaltext]Janet’ssisterisastewardessinafamousinternationalairl
[originaltext]M:Hi,Janet,youaresoluckytobedonewithyourfinalexamsa
[originaltext]M:Hi,Janet,youaresoluckytobedonewithyourfinalexamsa
[originaltext]W:You’restillsmoking!Afterpromisingtogiveitupsixmonths
[originaltext]W:You’restillsmoking!Afterpromisingtogiveitupsixmonths
[originaltext]W:You’restillsmoking!Afterpromisingtogiveitupsixmonths
随机试题
GrandCanyonHowwastheGrandCanyonformed?Thetruth
Ifyouweretobeginanewjobtomorrow,youwouldbringwithyousomebasics
Forthispart,youareallowed30minutestowriteacompositiononthetopicSt
下列选项中,属于系统外部信息的是()。
下列有关建设工程监理的表述正确的是( )。 A、在工程建设中,工程监理人员利
产后出血是指胎儿娩出后24小时内出血量超过A.100ml B.200ml C
下表为改革开放以来,某省注册医院数量发展情况表,根据下表,请问该省注册医院数量年
下边四个图形中,只有一个是由上边的四个图形拼合(只能通过上、下、左、右平移)而成
关于相同条件下同一估价对象的市场价值和现状价值的说法,正确的有()。A.在合法利
商业银行在实际工作中的“清算资金往来”属于()科目。A.资产类 B.负债
最新回复
(
0
)