正确答案: C

生产、生活使用的天然水必须经软化

题目：下列有关硬水及其软化的说法中错误的是：

解析：C

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举一反三的答案和解析：

[单选题]黄藻门与金藻门的贮藏物质均为金藻昆布糖和油。( )

正确

[单选题]减数分裂中，四联体形成于前期工的( )。

偶线期

[单选题]What can we learn from the last two paragraphs?

'IV sets shouldn't be allowed in children's bedrooms,

[单选题]Over the past 20 years, the Internet has helped change our world in way or another for the better.

one