下列反应中属于非氧化还原反应的是 ( )
A:CaO + H2O == Ca(OH)2
B:2FeCl3 + Cu == 2FeCl2 +CuCl2
C:Cl2+ H2O == HCl+HClO
D:2FeCl2+Cl2 == 2FeCl3
A pen is on the right of a ruler. The ruler is on the right of an eraser. That is to say, the ruler is ______ them.
下列各句中,划线词语使用恰当的一项是( )