水的状态（在p-v图和T-s图上)可以归纳为“一点两线三区五态”，三区指的是 。（xxx、xxx和xxx）
水的状态（在p-v图和T-s图上)可以归纳为“一点两线三区五态”，三区指的是 。（xxx、xxx和xxx）
参考答案和解析
饱和水线,饱和蒸汽线
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