2ml=__m^3=__cm^3 2g/cm^3=__kg/m^3
问题描述：
2ml=__m^3=__cm^3 2g/cm^3=__kg/m^3
答
1ml=0.001l,1l=0.001m^3,2ml=2乘以0.001乘以0.001m^3
2g/cm^3=2乘以0.002Kg/(0.001乘以0.001)m^3=2000Kg/m^3