题目内容：

下列离子方程式对应的化学方程式正确的是

A. H++OH﹣═H2O                     CH3COOH+NaOH═CH3COONa+H2O

B. Ba2++SO42﹣═BaSO4↓               Ba（OH）2+H2SO4═BaSO4↓+2H2O

C. CO32﹣+2H+═CO2↑+H2O              CaCO3+2HCl═CaCl2+CO2↑+H2O

D. 3Cu+8H++2NO3﹣═3Cu2++2NO↑+4H2O   3Cu+8HNO3（稀）═3Cu（NO3）2+2NO↑+4H2O