Unit4EarthquakesPartTwo:TeachingResources第二部分：教学资源Section2:BackgroundinformationonEARTHQUAKESI.ZhangHengZhangHeng(张衡)(78AD—139AD)wasanastronomer,mathematician,artistandliteraryscholar（文学学者）intheEasternHanDynastyofChina.Bornintoday’sNangyangCounty,Henan,hewasagoodwriteratage12.Attheageof16,helefthometopursue(从事)hisstudyingthecapitalcity.Hespentatleast10yearsofhisyouthinliterarystudiesandwriting.Hepublishedseveralwell-recognizedliterarywritings.Heswitchedto(转向)astronomyafterage30.Intheyear123hecorrectedthecalendartobringitintolinewiththeseasons.In132ZhangHenginventedthefirstseismograph(地震仪)formeasuringearthquakes.Hisdevicewasintheshapeofacylinder(圆柱体)witheightdragonheadsaroundthetop,eachwithaballinitsmouth.Aroundthebottomwereeightfrogs,eachdirectlyunderadragonhead.Whenanearthquakeoccurred,aballfelloutofthedragon’smouthintoafrog’smouth,makinganoise.Healsoinventedtheodometer(里程表)ZhangHengwasthefirstpersoninChinatoconstructarotatingcelestialglobe.Inoneofhispublicationshealsoproposedπ=730/232(orabout3.1466).II.EarthquakeSurvivalTipsWouldyouknowwhattododuringareallybigearthquake?Expertshavelookedintomattercarefully.Itmaybeworthyouwhiletolookoverthefollowingtipstheyhaveforus.Ifthegroundbeginsshakingwhileyouaredriving,pulloverandstayinyourcar.Ifyouareinabuilding,trytogetnearastrongwall.Thecorneroftheroomorthespaceunderabigdoorwayisthesafest.Assoonasthequakeisover,checkthegaspipeinthebuilding.Gasfiresoftenresultfromearthquakes.Thesetipsmayprovetobelifesavers.Weshould,therefore,keeptheminmind.Remembertoalwayshopeforthebestbutpreparefortheworst.EscapeintheSchoolIfithasanearthquakewhenhavingclasses,thestudentsshouldlistentotheteacher’sinstruction,protecttheirheadsandhideunderthedesks.Ifithasanearthquakewhenthestudentsareinthesportsground,theycancrouchonthespotandprotecttheirheadswithhands.Besuretokeepawaywithhighbuildinganddangerousobjects.Don’tgobacktotheclassroom.用心爱心专心116号编辑Retreatinorderaftertheearthquake.EscapeinPublicPlacesListentothecommandofthesiteworkers.Don’tbescaredanddon’trushtowardstheexits.Trytoavoidcrowds.Avoidtobesqueezedtothewallorbarriers.Attheatersandgyms:crouchdownorslipunderthechairs;avoidsuspendinglightsandelectricfans;protecttheheadwithschoolbags;aftertheearthquake,listentothecommandoftheworkers,retreatinanorganizedway.Indepartmentstores,bookstores,museumsorsubway:findfirmcounters,commodities(lowfurnitureetc.)orapillar,orthecornerofawalltocrouchdownonthespot,protecttheheadswithhandsorotherobjects;keepawayfromglasswindows,glasscountersorshowcounters;keepawayfromtallcupboards;keepawayfromadvertisementboardsandothersuspendingobjects.Onbusesortrolleybuses:Graspthehandlestoavoidbeinginjured;lowerthecenterofgravity;hideneartheseats;getoffaftertheearthquakepassed.用心爱心专心116号编辑
