已知氨气也能还原氧化铜,其反应的化学方程式为：2NH3+3CuO=3Cu+3H2O+X，其中X的化学式为 请选择DCBA;U+x1F)Y,F/\(w6z2Q8a8W9]-u5}7o'b:o2U
A.N2H42Q8a8W9]-u5}7o'b:o2U
B.N22Q8a8W9]-u5}7o'b:o2U
C.N2O2Q8a8W9]-u5}7o'b:o2U
D.N2O42Q8a8W9]-u5}7o'b:o2U