不能用来区别CO和CO2两种气体的方法是请选择DCBA(R4z/Z'R*C-h0r6b*R3m;v.d6V,R1}3e1N*b(@'S1f
A. 通入澄清的石灰水0r6b*R3m;v.d6V,R1}3e1N*b(@'S1f
B. 观察气体的颜色0r6b*R3m;v.d6V,R1}3e1N*b(@'S1f
C. 通入紫色石蕊试液0r6b*R3m;v.d6V,R1}3e1N*b(@'S1f
D. 点燃气体0r6b*R3m;v.d6V,R1}3e1N*b(@'S1f