题目

2015年世界水日的主题是“水与可持续发展”，下列说法正确的是 A．冰水共存物属于纯净物 B．硬水和软水可用石蕊试液来区分 C．有水生成的反应一定是酸和碱的中和反应 D．水电解所生成氢气和氧气的质量比为2:1 答案：A            that Marie was able to set up new branches elsewhere. A.So successful her business was B.So successful was her business C.So her business was successful D.So was her successful business