高数下册课件八章8 yuan era.pptx

Today’sTopic－Chinesepeoplegoinginto“8yuanera”ofoil

Whatisuptoit??Let’slearnaboutthenews………

OnMarch20th2012,ThenationaldevelopmentandReformCommissiondecidedtoincreasethepriceofRefinedoilagain.Everyliterofgasolineanddieseloilwasincreasedby0.44yuanand0.51yuan,onaveragenationally,whichmeantanincreaseof600yuanperton.Theamplitudemodulationisfarbeyondthepreviouslypredictionof400yuanpertonfrommarketinstitutions,anditalsomakesasecondbiggestincreasingrecordsince2008.Thusthe93petroland0dieselbothbreakthrough8yuan,markingChinasrefinedoilpricesgoinginto8Yuanera

Thisnewshasarisenheateddiscussionsinthepublic.Butwhycoulditcatchsomuchattention?Whatisthemeaningofthe“8yuanera”?Let’sgofurtherintothiscase………

JusttakeBeijingasanexample:In2007,thepriceof93petrolwasabout5yuanwhileitwasclosetodoubled5yearslater.Althoughtherewerethreetimesofpetrolpricedecreasesduringthisperiod,thespeedofpricesincreasewasunbelievablyfast,and“8yuan“wassolargeapricethatmanypeoplecouldnotimaginebefore2002.

Andsomethingfollow-upcausedbythecase……….

Alonglinewaitinginthegasstation…

Apreferenceoflowemissionvehicle

Amplitude[‘?mplitju:d]振幅CyclecrestModulation[?m?djulei??n]=adjustmenttroughVocabularycourse

era?[?i?r?]n.时代，纪元anentirelyneweraRefinedoil?R