电子信息专业英语 教学课件 作者 杨泽清 Unit7.ppt

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1、Unit7A.TextTransceiverNewWordsandExpressionstransceiver[trAn5si:vE]n.收发器，收发机transmitter[trAns5mitE]n.发射器，发射机receiver[ri5si:vE]n.接收器，接收机analogue[5AnElCg]adj.模拟的cellular[5seljulE]adj.分格的,蜂窝的cordless[5kC:dlis]adj.无绳的handheld[5hAndheld]adj.手持的mobile[5moubail]adj.移动的optical[5CptikE

2、l]adj.视觉的，光学的fiber[5faibE]n.纤维duplex[5dju:pleks]adj.双的，双向的，双工的substantially[sEb5stAnFEli]ad.相当地transformation[7trAnsfE5meiFEn]n.变换，变化parallel[5pArElel]adj.平行的;并联的serial[5siErEil]adj.串联的，连续的detect[di5tekt]vt.检测，探测external[eks5tE:nl]adj.外部的，外界的Ethernet[5i:WEnet]n.以太网enterprise[5

3、entEpraiz]n.企业，事业inreferenceto关于，有关TechnicalTermscellulartelephones蜂窝(便携式)电话cordlesstelephoneset无绳电话机opticalfiber光纤half/fullduplex半(全)双工模式LAN(LocalAreaNetwork)局域网NIC(NetworkInterfaceCard)网卡MediumAttachmentUnit(MAU)媒体连接器Notes1.Inaradiotransceiver,thereceiverissilencedwhiletrans

4、mitting.在一个无线电收发器中，信号发送过程中接收器是不工作的。句中whiletransmitting为现在分词短语做状语。Silence在此做动词，issilenced为系表结构，相当于is/keepsquiet。2.Thismodeisknownasfullduplex,andrequiresthatthetransmitterandreceiveroperateonsubstantiallydifferentfrequenciessothetransmittedsignalsdoesnotinterferewithreception.这

5、种模式被称为全双工模式，它要求发送和接收采用完全不同的频率，这样发送和接收信号之间就不会互相干扰。该句为复合句。句中isknownas和requires为并列谓语，thatthetransmitterandreceiveroperate…withreception为宾语从句，作requires的宾语。3.Itactuallyappliessignalsontothenetworkwireanddetectssignalspassingthroughthewire.它把信号加在网线上，检测通过网线的信号。passingthroughthewire分词

6、短语作定语。I.Choosetheonethatbestcompleteseachofthefollowingstatementsaccordingtothetext:1.Thewordtransceiverisanabbreviationof____________andreceiver.A.transformerB.transistorC.transmitterD.translator2.Atransceiverisadevicethatcantransmitandreceive__________.A.signalsB.frequencies

7、C.voiceD.sound3.Transceivercanbeusedincommunicationsaswellasin_________.A.electronicsB.networksC.computersD.electricity4.Transceiverisamachinewhichiscombinedin__________package.A.differentB.setC.twoD.oneExercisesCABD5.________belongstoonekindoftransceivers.A.TransistorradioB.T

8、elevisionC.CordlesstelephonesetD.Fiber6.Themodeoftransceivers