某农�中学的化学兴趣小组在开展实验活动时用山泉水配制氢氧化钠溶液结果配制几次所得的溶液都出现�浊的现象放置一段时间后容器底部还出现白色 Template




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tomski某农�中学的化学兴趣小组在开展实验活动时用山泉水配制氢氧化钠溶液结果配制几次所得的溶液都出现�浊的现象放置一段时间后容器底部还出现白色 coloring