空气质量小常识
    
        
            - 1、口罩小知识
- 
                常见的PM2.5口罩有N90,N95,N99等类型,其中数字90代表过滤效果在90%以上,95代表过滤效果在95%以上。过渡效果越好,相对呼吸也越困难,一般选择N90系列的口罩就足够了。
            
- 2、PM2.5和PM10的区别
- PM2.5指空气中直径≤2.5微米的颗粒物,可入肺。吸入过多易引发哮喘、支气管炎和心血管病等疾病。
 PM10指空气中直径≤10微米的颗粒物,可入上呼吸道,但可排出体外,对人体危害相对较小。
- 3、雾霾是什么?
- 
                雾霾天气是一种大气污染状态,包含各种含量超标的悬浮颗粒物。雾是液态水珠,霾是固体,包括空气中的灰尘、硫酸、硝酸、可吸入颗粒物等粒子,会使能见度降低。两者结合在一起就是雾霾。
            
 
 
 
    
        
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                        错误
                        SQL
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                    - 请求信息 : 2025-11-01 03:44:32 HTTP/2.0 GET : https://m.tianqibao.com/aqi/xinbaerhuyouqi.html
- 运行时间 : 0.601149s [ 吞吐率:1.66req/s ] 内存消耗:6,465.16kb 文件加载:238
- 查询信息 : 43 queries
- 缓存信息 : 34 reads,34 writes
- 会话信息 : SESSION_ID=a22303299384881731ffb6afc5a15edc
 
                        
                        
                        
                        
                
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