下列化学方程式书写不正确的是 请选择DCBA/`/M4P0i7\.Z:r+S9s1H*j:_2d5|,g*O9V2_1I
A．Mg+2HCl=== MgCl2+H2↑+S9s1H*j:_2d5|,g*O9V2_1I
B．KMnO4K2MnO4+MnO2+O2↑+S9s1H*j:_2d5|,g*O9V2_1I
C．4P+5O22P2O5+S9s1H*j:_2d5|,g*O9V2_1I
D．CaCO3+2HCl===CaCl2+H2O+CO2↑+S9s1H*j:_2d5|,g*O9V2_1I