韩光明回答:
SO3+2OH-=H2O+SO42-
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【英语选词填空tend,everyday,business,reflect,greet,forgivereason,path,remind,grateful,pride,judge1.ineedsometimealoneto____onwhathasjusthappened.2.hehasa___tohateherbecausesheisresponsibleforhimlosinghsjob3.itwa】
选词填空选择的:often,be,come,England,class,too,teach,teacher,her,alotIhavean(1)friendatschool.HisnameisTom.Heiseleven.Weareindifferent(2).Butwe(3)inthesamegrade.HeisinClass3.,butIaminClass2.Hismoutherisani