题目

用石墨作电极电解滴有酚酞的饱和食盐水，下列说法正确的是A．阳极上产生氢气                   B．阴极附近溶液呈红色C．阴极上产生氯气                   D．溶液中的阳离子向阳极移动 答案：BNo matter how carefully you plan your finances, no one can _____ when the unexpected will happen.A. prove B. imply C. demand D. predict