铁生锈的原因 请选择ABCD9q6R,l(w(e5G3a7p,](N)w5W'p.J,g7G9y:g5M.X/j4m3f
A．仅需要氧气,g7G9y:g5M.X/j4m3f
B．仅需要水,g7G9y:g5M.X/j4m3f
C．氧气或水,g7G9y:g5M.X/j4m3f
D．氧气和水,g7G9y:g5M.X/j4m3f