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空气指标多少算正常

更新时间: 2020-11-04 00:00:00     

PM2.5小于10。空气质量指数是定量描述空气质量状况的无量纲指数。其数值越大、级别和类别越高、表征颜色越深,说明空气污染状况越严重,对人体的健康危害也就越大。针对单项污染物还规定了空气质量分指数。

关键词: 空气 指标 多少 正常

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