- CasioLCDpocketcolortelevisionTheceremonyispledgedwithfullsupportfromBritishCouncilandCasioShanghai.Thesephones,asyetonlyprototypesfromCasio,aJapanesefirm,transmitdigitalsignalsbyvaryingtheintensityofthelightgivenofffromtheirscreens....
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- 问题详情:在工业炼铁中,石灰石发生的化学原理是:CaCO3+SiO2X+CO2↑,其中X的化学式是()A.CaSiO4 B.Ca2SiO3 C.CaSi2O3 D.CaSiO3【回答】【考点】质量守恒定律及其应用.【专题】元素质量守恒;化学用语和质量守恒定律.【分析】由质量守恒定律:反应前后,原子种类、数目均不变,据此由...
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