中性(pH=7)的水是(    )
   A．海水    B．雨水    C．蒸馏水D．自来水

A.174.24.96:6088/Latex/latex.action?latex=SF8yQXNPXzReLQ%3D%3D'
B.H₂AsO₄
C.D.174.24.96:6088/Latex/latex.action?latex=SF8yQXNPXzReezItfQ%3D%3D'
E.F.174.24.96:6088/Latex/latex.action?latex=QXNPXzReezItfQ%3D%3D'
G.H.174.24.96:6088/Latex/latex.action?latex=SF8yQXNPXzNeLQ%3D%3D'