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来源：学生作业帮 编辑：大师作文网作业帮 分类：英语作业 时间：2024/09/24 14:28:02
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The Beijing Municipal Environmental Monitoring Center on Friday started to release the real-time data on PM 2.5 particulates,matter less than 2.5 micrometers in diameter,collected by the first batch of 20 monitoring stations.Beijing will set up a total of 35 air quality monitoring stations by the end of this year,the newspaper reported.