关于水的说法正确的是 请选择ABCD8p2V4p*j/a;b)C/l9z.c/]-},}7P7}:P7H7y
A．将活性炭放入硬水中能使其软化9z.c/]-},}7P7}:P7H7y
B．用肥皂水可检验硬水和软水9z.c/]-},}7P7}:P7H7y
C．过滤能够除去水中所有杂质9z.c/]-},}7P7}:P7H7y
D．向硬水中加明矾净水剂后得到纯水9z.c/]-},}7P7}:P7H7y