搜索
compassThecompasswasintheearth'smagneticfieldusingmagnetsmadethenorth-southreferstopolarity(对立)apointtoinstrument.Whatiscompass?compassThewarringstatesperiodTheSongdynastyTheMingdynastyMainTimelineNowadayspolaritySiNaEarlyinthewarringstatesperiod,usingmagnetstoinventtheguidebookinstrument-polaritySiNa.guidefishThroughlong-termpracticeandtrialanderror,northernpeoplediscoveredtheartificially(人为地)magnetizationmethod,andtherebymadeguidefishandacompass.ZhengHe’sexpeditionsEspeciallyduringtheMingDynasty,ZhengHemadeexpeditionstoSouth-eastAsiaforseventimes,whichcontributestotheextensionanddevelopmentofseafaringandforeigntradeintheworld.SimplecompassMarxhadputacompassandprinting,theinventionofgunpowderiscalled“isbourgeois（资产阶级）developmentnecessarypremise.ComplexcompassNowGPShasalsobeenshowntobeanimportantciviliancommunitiesofinterest,andincreasinglywiderangeofapplication.functionDirectionFengshuiInfluencesailculturecapitalismOurcountryisthefirststateofpolarityofthemagnetreferstofind.TheinventionofthecompasstotheworldoftheChinesenation,isagreatcontributionstocivilization.