unit16Scienceatwork课件
日期：2010-04-16 04:37
ScientistsatworkUnit16ThenatureoflightningReading Franklin’sFamousKiteExperimentBenjaminFranklin(1706~1790)AnAmericanstatesman，writerandscientistproveleadorguide(sb/sth)chargeamountofelectricityputintoabatteryorcontainedinasubstanceappearshowthatsthistrueorcertainbymeansofargumentorevidence(证据)conductbecomevisibleexplainpull(sth)forciblyapartorawayortopiecesfastenfirmlyattachsthtosthortwothingstogethertearmakesthclearoreasytounderstandImportantwordsinthetextReadthetextandthentrytodecideTrueorFalseTask11In1752scientistsalreadyknewwhatelectricityis2Franklinwashelpedbyafriendtodotheexperiment3Franklinmadethekiteofsilkbecausewetsilkdoesnotconductelectricity4Acondenserwasusedintheexperimenttostoreelectricity5ThekeytiedtothestringwasputintothedoortostopthekitefromflyingawayTFFTFFranklinmadethekiteofsilkbe，
查看全部