四大发明英语幻灯片

USEFULINVENTIONSAROUNDUSPresentedbyChristina•FourGreatInventionsofAncientChina•Compass•Gunpowder•Papermaking•Printing•Compassisusedtodeterminepositionofasimpleinstrument.FormallyknownasSinan.Themainpartsareplacedonashaftthatcanfreelyrotatetheneedle(commonlyknownasmagnet).compass•NeedlepointstothegeographicalNorthPole&SouthPole,takingadvantageofthisperformancecanbeasenseofdirection.Commonlyusedinsailing,travelling,militaryandsoon.compass•Duringsomechemicalprocesses,threekindsofmaterialsaremixed,whenpeoplehavethesethreekindsofthingsasthetreatmentofdrug,gunpowderismade.“Gunpowder“meansfiremedicine.gunpowder•About3,500yearsagointheShangDynasty,Chinausedcarvedturtleshellsandanimalbonestowritetexton,calledtheOracle.Aftertimepeopleknowthemasbambooandwoodslips.papermaking•BecauseOracleBoneswereveryheavy,paperwasinventedintheearlyWesternHanDynasty.IntheEasternHanperiod,paperwasinventedbyCaiLun.•BlockPrintingbeganintheSuiDynastybyBiShengwhenthedevelopmentimproved.China'sprintingisabeginningofmoderncivilizationofmankind,fortheknowledgeexchange.printing•Fourgreatinventionsinhumanhistory,scienceandcultureleftabrilliantpage.Thesegreatinventionshaveaffectedandbenefitedthewholeworldtopromotetheprogressofhumanhistory•SomeinterestinginventionsDusterCatSlippers•Theproductitselfissimpleenough.Asetofdustersthatwouldfitintothecat'spawsandcleanupthefloorwhilethecatidlesaround.Where'syourbiscuit?•Thebiscuitsareinthecup.Inthebaseofthecup.Inanicelittlehole.Itisconvenienttoeatthem.360degreesofimagery•Allangledcamerascapturememoriesin360Degrees.Nothingismissedout.•THANKSFORWATCHING~