最新Chapter32坡印廷定理教学讲义PPT课件.ppt

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1、Chapter32坡印廷定理洛仑兹力等离子体等离子体是电离了的气体，含有大量带正电的离子和带负电的电子，与束缚在原子中的带负电的电子和带正电的核不同，等离子体中的电子和离子可以自由运动。而形离开地面80~120km的电离层就是一个等离子体，电离层是由太阳辐射来的紫外光电离高空大气成的。坡印廷功率流表示什么？表示的物理意义复数坡印廷功率流复数坡印廷功率流的物理意义I复数坡印廷功率流的物理意义IIP141例3-6本章要点P150－151小结、复习作业(P152)3.53.73.9关系副词引导的定语从句1.when指时间，在定语从句中作时间状语。Istillrememberthedayw

2、henIfirstcametothisschool.Thetimewhenwegottogetherfinallyarrived.October1,1949wasthedaywhenthePeople’sRepublicofChinawasfounded.Doyouremembertheyearswhenhelivedinthecountrysidewithhisgrandparents.2.where指地点，在定语从句中作地点状语。ShanghaiisthecitywhereIwasborn.Ivisitedthefarmwherealotofcowswereraised.Theho

3、usewhereIlivedtenyearsagohasbeenpulleddown.Isthistheplacewheretheyfoughttheenemy?3.why指原因，在定语从句中作原因状语。Pleasetellmethereasonwhyyoumissedtheplane.Thereasonwhyhewaspunishedisunknowntous.Idon’tknowthereasonwhyhelooksunhappytoday.Kunmingisabeautifulplace______flowersareseenalltheyearround.Kunmingisab

4、eautifulplace______iscalledtheCityofSpring.Kunmingisabeautifulplace______manywritersmentionedintheirbook.注意：关系副词引导的定语从句经常可以用“介词+关系代词”引导的定语从句来表示。when=on(in,at,during…)+which;where=in(at,on…)+which;why=forwhich.如：IwasinBeijingonthedaywhen(=onwhich)hearrived.Theofficewhere(=inwhich)heworksisontheth

5、irdfloor.Thisisthechiefreasonwhy(=forwhich)wedidit.-29-定语从句关系词的判断方法①ThisisthemountainvillagewhereIstayedlastyear.Thisisthemountainvillage(which)Ivisitedlastyear.②I’llneverforgetthedayswhenIworkedtogetherwithyou.I’llneverforgetthedays(which)Ispentwithyou.-30-Thereason__________youexplainedtothete

6、acherisgroundless.Thereason__________hedidn’tshowupwasthathewasstuckinthetrafficjam.2、关系代词和关系副词的比较1、Doyoustillrememberthechickenfarm_____wevisitedthreemonthsago?A.whereB.whenC.thatD.what2、Thereweredirtymarksonhertrousers______shehadwipedherhands.A.whereB.whichC.whenD.thatShe'llneverforgetherstay

7、there________shefoundhersonwhohadgonemissingtwoyearsbefore.A．thatB．whichC．whereD．when【解析】D　考查定语从句的用法。herstay为先行词，可以理解为抽象的一段时间(她呆在那里期间)，when指代herstay，在定语从句中作时间状语。5．TVTurnoffWeek，________millionsofpeoplearoundtheworldparticipa