reduce level of PM2.5 by 25什么意思?求大神!
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reduce level of PM2.5 by 25什么意思?求大神!
reduce level of PM2.5 by 25什么意思?
求大神!
reduce level of PM2.5 by 25什么意思?求大神!
PM2.5是指大气中直径小于或等于2.5微米的颗粒物,也称为可入肺颗粒物.被吸入人体后会直接进入支气管,干扰肺部的气体交换,引发包括哮喘、支气管炎和心血管病等方面的疾病.
Reduce level of PM2.5 by 25 就是2.5 微米颗粒物减少了25 微克/立方米 .
根据PM2.5检测网的空气质量新标准,24小时平均值标准值分布如下:
优:35 良:35~75 轻度污染:75~115 中度污染:115~150
重度污染:150~250 严重污染:350及以上,单位为微克/立方米
reduce level of PM2.5 by 25什么意思?求大神!
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