首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
"Fax Machines" Now listen to part of a lecture in a business class. The professor is discussing the way that a fax machine
"Fax Machines" Now listen to part of a lecture in a business class. The professor is discussing the way that a fax machine
admin
2012-01-14
44
问题
"Fax Machines"
Now listen to part of a lecture in a business class. The professor is discussing the way that a fax machine transmits and receives data.
Question
Using the main points and examples from the lecture, describe the three parts of a fax machine and then explain how the fax process works.
Preparation Time: 20 seconds
Recording Time: 60 seconds
Narrator 2: Number 6. Listen to part of a lecture. Then listen for a question about it. After you hear the question, you have 20 seconds to prepare, and 60 seconds to record your answer.
Narrator 1 : Now listen to part of a lecture in a business class. The professor is discussing the way that a fax machine transmits and receives data.
Professor:
Okay, to illustrate my point that many new machines are simply combinations of machines that are already available, let’s talk about the fax machine. To understand how a fax machine works, I’d like you to think of it as three machines.., a copier, a modem, and a printer. First, the data is copied. How does that happen? Well, when you load paper into the fax machine, a light shines on it and optical sensors read whether a specific point on the paper is black or white. These sensors communicate the digital information into a microprocessor, where a copy of the page is made of black or white dots. Thus, you see that in the first step, the fax machine functions like a copier. Next, the fax machine works like a modem. Remember, a modem takes a black-and-white image and converts this digital data into an analog signal, that is, electronic impulses that can be sent over a phone line. The fax machine calls another fax machine to transmit, using two different types of tones to represent the black and white dots in the document. For example, it might send an 800-Hertz tone for white and a 1,300-Hertz tone for black. The last part of a fax machine is the printer. After the receiving fax machine answers the sending fax machine, it begins to accept the electronic impulses, and then it converts them back to the black-and-white dots in a digital image. Finally, it prints the image out on paper just like any other printer.
Narrator 1: Using the main points and examples from the lecture, describe the three parts of a fax machine and then explain how the fax process works. Narrator 2: Please prepare your answer after the beep.
Beep
[Preparation time: 20 seconds]
Narrator 2: Please begin speaking after the beep.
Beep
[Recording time: 60 seconds]
Beep
选项
答案
Rexponses will vary.
解析
转载请注明原文地址:https://kaotiyun.com/show/TPyO777K
0
托福(TOEFL)
相关试题推荐
Lookatthefollowingstatements(Questions22-26)andlistofbooks(A-E)below.Matcheachstatementwiththecorrectbook,A-E.W
Lookatthefollowingstatements(Questions22-26)andlistofbooks(A-E)below.Matcheachstatementwiththecorrectbook,A-E.W
Inthelastdecadearevolutionhasoccurredinthewaythatscientiststhinkaboutthebrain.Wenowknowthatthedecisionshu
ElephantCommunicationO’Connell-Rodwell,apostdoctoralfellowatStanfordUniversity,hastravelledtoNamibia’sfirst-ev
ThePearlA.Thepearlhasalwayshadaspecialstatusintherichandpowerfulallthroughthehistory.Forinstance,women
TheEvolutionaryMystery:CrocodileSurvivesA.Eventhoughcrocodileshaveexistedfor200millionyears,they’reanything
Thereisa______at13WardrockPlace.______mightofferdiscountedaccommodationduringlowseasons.
Choosethecorrectletter,A,BorC.PlanningapresentationonnanotechnologyRusssaysthathisdifficultyinplanningthep
随机试题
我国新课程改革不倡导的教学观念是()。
__________是以政府作为债权人或者债务人的信用。目前,国家信用的工具主要包括中央政府债券、地方政府债券和政府担保债券三种。
杜甫对统治者穷兵黩武政策进行强烈谴责的作品是()
A.医生、患者各自的权利与义务B.医务人员受患者的委托或其他原因,对患者实施诊断、治疗等医疗行为所形成的关系C.医患之间就医疗某环节产生认识上的分歧,且患方提出损害赔偿D.医务人员疏忽大意违反卫生法律相关规定,给患者造成明显人身伤害E.为避免患者的
交流操作电源受系统故障影响大,可靠性差,但其运行维护简单,投资少,实施方便,可直接从()或()取得电源。
某柱采用MU10烧结普通砖及M5水泥砂浆砌体,截面为490mm×620mm,柱计算高度,H0=5.6m,为偏心受压。偏心距为e=90mm(长边方向)施工控制质量为B级。该柱的承载力与()项数值最为接近。
某企业职工赵某本月工资5000元,其捐给希望工程基余会1400元,单位扣缴其个人所得税295元。()
在办公自动化软件’Word中可以直接绘制和编辑图形、图片,这种功能是通过______来实现的。
证明:r(AB)≤min{r(A),r(B)}.
与“SELECTDISTINCT歌手号FROM歌手WHERE最后得分>=ALL;(SELECT最后得分FROM歌手WHEREStmSTR(歌手号,1,1)="2")"等价的SQL语句是
最新回复
(
0
)