首页
登录
职称英语
[originaltext] Most people might think that the fax machine, found in many o
[originaltext] Most people might think that the fax machine, found in many o
游客
2023-07-19
74
管理
问题
Most people might think that the fax machine, found in many offices and homes, is a relatively new piece of technology. In fact, a license for the fax machine was issued in 1843, 33 years before the telephone! A Scottish clockmaker, Alexander Bain, invented this device in the same year that the first telegraph message was being sent across America.
Although Bain worked out the method, he never actually sent a fax transmission. It was not until 1865 that the first working fax machines and transmission service were setup. (34) An Italian man named Giovanni Casel-li developed the "pan-telegraph" which was used to send pictures and writing between French cities.
The way that a fax machine works is quite straightforward. A machine scans horizontally across the sheet one line at a time—like your eyes when you’re reading a book. If the machine sees a white patch it records a 0, and if it sees a dark patch it records a 1. In this way the whole page is "digitized" into a string of 0s and Is. (35) A modem turns this into a series of high or low pitched sounds that are sent down the phone line to a remote receiver. At the other end, the sounds are turned back into 0s and 1s. These are printed onto a piece of paper as light or dark dots, and so the original picture is reproduced hundreds of miles away.
33. What is the main topic of the passage?
34. What was the "pan-telegraph" first used for?
35. What do we learn about the modem?
选项
A、It scans the sheet horizontally.
B、It turns 0s and 1s into sounds.
C、It sends sounds to phone lines.
D、It prints light or dark dots.
答案
B
解析
题干询问关于调制解调器的信息。短文中提到,它可以将已经转化好的数据转变为声音,故答案为B)。
转载请注明原文地址:https://tihaiku.com/zcyy/2850034.html
相关试题推荐
[originaltext]Oneofthegreatestheartbreaksforfirefightersoccurswhen
[originaltext]Oneofthegreatestheartbreaksforfirefightersoccurswhen
[originaltext]Oneofthegreatestheartbreaksforfirefightersoccurswhen
[originaltext]Imaginethatsomeoneinyourneighbourhoodbrokethelaw,and
[originaltext]Imaginethatsomeoneinyourneighbourhoodbrokethelaw,and
[originaltext]Somepeoplewanttomakeandsavealotofmoneyinorderto
[originaltext]Somepeoplewanttomakeandsavealotofmoneyinorderto
[originaltext]M:Mrs.Dawson,thanksverymuchforcomingdowntothestation.
[originaltext]M:Mrs.Dawson,thanksverymuchforcomingdowntothestation.
[originaltext]M:Ohmygod!Theheatissimplyunbearablehere.Iwishwe’vego
随机试题
Mostpeoplehaterockmusic.【C1】______Iamnotbynatureanunreasonableor
Inthissection,youaregoingtoreadapassagewithtenstatementsattachedto
Onamoremundane(世俗的)level,third-generationmobiletelephones,despitea
[originaltext](1)TheInternationalLaborOrganizationsaysthenumberofp
Ouruniversitylibraryislocatedinthe(11)ofourcampus.Itlookslike
基础体温双相型表明( )A.有排卵 B.有雄激素分泌 C.生殖器感染 D
某单位甲、乙、丙三人负责整理一项档案,他们工作5天完成了1/4,之后甲和乙因其他
遗传一般指亲代的性状又在下代中出现,对植物、动物遗传起决定作用的是( )A.蛋
某项目有甲乙丙丁4个投资方案,寿命期都是8年,基准折现率10%,(P/A,10%
()是针对项目实际运行状况,对工程项目采用的工艺流程、装备水平进行再分析,主要
最新回复
(
0
)