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下列化学方程式书写错误的是
A.4P + 5O22P2O5 B.CH4+2O2=CO2+2H2O
C. Zn+CuSO4=ZnSO4+Cu D.CaCO3+2HCl =CaCl2+CO2↑+H2O
A.4P+5O22P2O5
B.Zn+H2SO4ZnSO4+H2↑
C.CH4+O2CO2+H2O
D.HCl+NaOHNaCl+H2O