第18题: [单项选择]{{B}}Passage One
Questions 26 to 28 are based on the passage you have just heard.{{/B}} A. Soft water contains more dissolved minerals. B. Hard water contains more dissolved minerals. C. Hard water is not drinkable. D. Soft water is easier to drink. 参考答案:B 答案解析:[听力原文] 26-28
The ground water can be divided into "soft water" and "hard water". Soft water has