庞宇博中小学生的防御能力比较弱,雾霾天气可引起气管炎、喉炎、肺炎、哮喘、鼻炎、眼结膜炎及过敏性疾病等入冬以来,“雾霾”一语再度成为热点词汇。事实上,雾霾是雾和霾的混合物。其中,雾是自然天气现象,是空气中微小水滴或冰晶悬浮体,由于散射光的特性,雾看起来呈乳白色或青白色。而霾的核心物质是悬浮在空气中的烟、尘等物质,颜色发黄。一般而言,相对湿度在90%以上时,雾的成分多;湿度 Pang Yubo primary and secondary students defense ability is relatively weak, fog and haze can cause tracheitis, laryngitis, pneumonia, asthma, rhinitis, conjunctivitis and allergic diseases and other winter, “fog” once again become a hot word . In fact, smog is a mixture of fog and haze. Among them, the fog is a natural weather phenomenon, the air is a small drop of water or ice suspension, due to the characteristics of the scattered light, the fog looks milky white or blue. The haze of the core material is suspended in the air of smoke, dust and other substances, yellow color. In general, the relative humidity of 90% or more, the composition of the fog; humidity