某温度下,纯水的c(H+)=3×10﹣7mol/L,Na2S和NaOH两溶液的pH均为12,则两溶液中由水电离出的c(OH﹣)的比值为 ____ .
I _______ to you as soon as I get there.
A.棉纱织布
B.粮食酿酒
C.指南针应用
D.____