题目

I'm Jack and _____ name is David. A . my B . their C . his 答案：C下列电离方程式或化学方程式的书写完全正确的是（ ）A．FeCl3=Fe2++3Cl-B．Fe+2AgCl=FeCl2+2AgC．H2SO4=2H++SO42-D．2CH3OH+3O22CO2+4H2O