题目

下列离子方程式正确的是(    )A.H2SO4与Ba(OH)2溶液反应:Ba2++OH-+H++BaSO4↓+H2OB.CuSO4溶液吸收H2S气体:Cu2++H2SCuS↓+2H+C.AlCl3溶液中加入过量的浓氨水:Al3++4NH3·H2O+2H2OD.等体积、等浓度的Ba(OH)2稀溶液与NH4HCO3稀溶液混合:Ba2++2OH-+ +BaCO3↓+NH3·H2O+H2O 答案：BD解析:A项中发生中和反应，H+和OH-的化学计量数都是2，故该项错。AlCl3中即使加入过量的氨水，也只能生成Al(OH)3，故该项错误。My aunt has two children. But ________ of them lives with her. [     ]A. each B. neither C. eitherD. both