While rescuing his sister trapped in the fire, the little boy showed courage and calmness. A. alternative B. considerable C. subjective D. favorable 答案:B下图是甲、乙、丙三种物质(均不含结晶水)的溶解度曲线,现有t2℃时,甲、乙、丙三种物质的饱和溶液(无固体存在),请根据下图回答:
(1)t2℃时,将三种饱和溶液分别恒温蒸发掉相同质量的水,析出晶体最多的是________;
(2)将三种饱和溶液分别从t2℃降温到t1℃时,所得溶液中溶质的质量分数由大到小的顺序为________.