(1)Words reviewinfraredcircuitlightrelayvalveS复习：填出缺失的字母并翻译 1.r_lay 2. c_rcuit 3. v_lve 4. _nfared 5. l_ghte ia i i对话：（M=Manager， Z=Zhang Ming）M：Hello！ Please tell us something about automatic faucets.经理：你好！请你说一说自动水龙头电路的组成情况。Z：In its control circuit ,power source is AC 220V/50HZ,the control device is an infrared automatic switch ,the electromagnetic valve YV is the load .张明：在其控制电路中，电源是 220V/50HZ交流电, 控制装置是红外线自动关开，负载是电磁阀YV。 What is this ?音箱： speakerspikWhat is this ?视频线： Video cablecable：缆线keb()lvdvideo：视频What is this ?音频线： audio cabledaudio：音频，音响What does she have in her hand?（她手上拿着什么？）.话筒： microphonemakrfnWhats so mysterious？什么东西这么神奇？投影仪： projectorprdektWords reviewspeakerVideo cableAudio cablemicrophoneprojectorPart 3Part 3：Listen, read and writeListen, read and write（听，读，写）（听，读，写）Part 1Exercise Match Chinese with Englishmicrophone音箱视频线音频线功放话筒投影仪speakerVideo cableAudio cableprojectorPower amplifierPart 1fill in the blanks according to the informationUse the toconnect the two .用音频线把两只 音箱连接起来。audio cablespeakersPart 1fill in the blanks according to the informationPlease use the to sing.请使用话筒唱歌。microphonePart 1fill in the blanks according to the informationConnect a computer anda TV with a .用视频线将电脑 和电视连接起来。video cablePart 4Part 4：seatworkseatwork（课堂作业）（课堂作业）以下单词各抄写两行（每行四个）cablespeakervideoaudiomicrophoneprojector音箱视频音频话筒投影仪缆线