题目

阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整的短文.Iwas walking down the muddy road one day when my cell phone rang. A child'svoice on the other end spoke to me softly, Dad, please come hack soon. Imiss you so much! Unconsciously, I knew it was a wrong number once again.I don't have a single daughter. I just have a six-year-old son. It is notunusual to receive this kind of calls nowadays, so I replied rudely,You've dialed the wrong number! and then hung up in anger.Duringthe following days, I got the same call now and then. It disturbed铜的冶炼大致可分为：(1)富集，将硫化物矿进行浮选(2)焙烧，主要反应：2CuFeS2＋4O2=Cu2S＋3SO2＋2FeO(炉渣)(3)制粗铜，在1200 ℃发生的主要反应：2Cu2S＋3O2=2Cu2O＋2SO2；2Cu2O＋Cu2S=6Cu＋SO2↑(4)电解精炼下列说法正确的是A．上述焙烧过程的尾气均可直接排空B．由6 mol CuFeS2生成6 mol Cu，上述共消耗15 mol O2C．在反应2Cu2O＋Cu2S=6Cu＋SO2↑中，作氧化剂的只有Cu2OD．电解精炼时，粗铜应与外电源负极相连