- 問題詳情:在工業鍊鐵中,石灰石發生的化學原理是:CaCO3+SiO2X+CO2↑,其中X的化學式是()A.CaSiO4 B.Ca2SiO3 C.CaSi2O3 D.CaSiO3【回答】【考點】質量守恆定律及其應用.【專題】元素質量守恆;化學用語和質量守恆定律.【分析】由質量守恆定律:反應前後,原子種類、數目均不變,據此由...
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- CasioLCDpocketcolortelevisionTheceremonyispledgedwithfullsupportfromBritishCouncilandCasioShanghai.Thesephones,asyetonlyprototypesfromCasio,aJapanesefirm,transmitdigitalsignalsbyvaryingtheintensityofthelightgivenofffromtheirscreens....
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