最新上课稿--串联形状稳压电路课件PPT.ppt 23页

'上课稿--串联形状稳压电路 T1调整管R3、T2比较放大R1、RW、R2采样电阻R、UZ基准电压3.分立元件组成的串联式稳压电源R3T1T2UZRRW1RW2R1RWR2RLUO+_+_UIUB2 在实际电路中，可变电阻R是用一个三极管来替代的，控制基极电位，从而就控制了三极管的管压降VCE，VCE相当于VR。串联型稳压电路方框图串联型稳压电源的构成：调整管、放大环节、比较环节、基准电压源 (3)输出电压的确定和调节范围因为：OU2BEZUU+22WRR+21WRRR++=()22221BEZWWOUURRRRRU++++=所以：2221ZWWURRRRR+++=忽略UBE2R3T1T2UZRRW1RW2R1RWR2RLUO+_+_UIUB2 Goodmorning,everyone! Review：phrases：makeanewfilmwanttodosth.arriveat/inbyourreporter感官动词有哪些制作/拍摄一部新电影想要做某事到达小地点/大地点由本报记者报导feel/look/smell/sound/taste 当直接引语为陈述句，变成间接引语的“顺口溜”是：去掉引号加that，人称变化要灵活，时态向后退一步，状语变化按规则。直接引语间接引语一般现在时一般过去时一般过去时过去完成时现在进行时过去进行时现在完成时过去完成时过去完成时过去完成时Grammar： Lesson135Thelatestreport 单词学习futuren.未来的getmarriedv.结婚hoteln.饭店latestadj.最新的introducevt.介绍 future1)adj.未来的，将来的eg：他在法学院遇到了他的未婚妻。Hemethisfuturewifeatlawschool.2）n.未来，将来，前途inthefuture将来eg：未来对我们来说总是不可知的。Thefutureisalwaysunknowntous. latest1)adj.最新的最新消息thelatestnews2)adj.最晚的（late的最高级）eg：她是最晚来的人。Shewasthelatestpersontocome.请稍后再拨。Pleasetryagainlater.。 marry:v.嫁，娶marrysb.与某人结婚getmarried结婚getmarriedtosb与…结婚 introduce1)v.介绍introducesb.tosb.把...介绍给某人eg：让我向你介绍我的朋友乔治。MayIintroducemyfriendGeorgetoyou?introduceoneself介绍自己2）introductionn.介绍makeaself-introduction 课文讲解Areyoureallygoingtoretire,MissMarsh?really真的，确实，加强语气eg:尝尝这个酒，真的很好喝Trythiswine，itisreallydelicious.Imay.Ican’tmakeupmymind.makeupone’smind拿定主意，做出决定eg：他们下决心要把房子卖掉。Theymadeuptheirmindstosellthehouse． Iwillhavetoaskmyfuturehusband.Hewon’tletmemakeanotherfilm.futurehusband未婚夫letsb.dosth.让（允许）某人做某事相当于allowsb.todosth.允许某人做某事eg：Justletmetry!就让我试试吧！她的父母不会让她和那个男孩出去的。Herparentswouldn’tlethergooutwiththatboy. Yourfuturehusband,MissMarsh?Yes,letmeintroducehimtoyou.HisnameisGarlos.introducesb.tosb.将某人介绍给某人eg：让我把我姐姐介绍给你MayIintroducemysistertoyou?We’regoingtogetmarriednextweek.getmarried结婚　　表示结婚的行为bemarried（己）结婚表示己婚的状态你结婚了吗？Areyoumarried？你什么时候结的婚？Whendidyougetmarried? Look,Liz!Here"sanotherreportaboutKarenMarsh.Listen:"KarenMarsh:Thelatest.AtherLondonHoteltodayMissMarshtoldreportersshemightretire.Here’s…这里有….这里有你的一封信。Here’saletterforyou.给你一个苹果Here’sanappleforyou.areportabout...关于...的报导thelatest这里指最新消息 将文中的间接引语改为直接引语：Shesaid，‘Ican"tmakeupmymind.’Shesaid，‘Iwillhavetoaskmyfuturehusband.’Shesaid，‘myfuturehusbandwillnotletmemakeanotherfilm.’That"ssensationalnews,isn"tit,Kate?反义疑问句(前肯，后否)（前否，后肯）Sheisnotfamous,_____?HecanspeakEnglishwell,_____?WewenttoShaneEnglishSchoolyesterday,____? Grammar:直接引语变间接引语（2）情态助动词的变化may----mightcan-----couldwill-----wouldwon’t---wouldn’tcan’t---couldn’t Shesaid,"Myfuturehusbandwillnotletmemakeanotherfilm."Shesaidherfuturehusbandwouldnotlethermakeanotherfilm.Shesaid,"wewillgetmarriednextweek."Shesaidthattheywouldgetmarriednextweek.课堂练习Hesaidhecouldn"tspeakEnglish.Hesaid,"Ican"tspeakEnglish."'