同学们,不知道大家还记不记得去年冬天,我们有过几次的停课?想必大家都还记得,原因应该也不会忘记,那就是两个恐怖的字眼:雾霾。雾霾的出现严重影响了我们的生活,所以保护环境更是一件迫在眉睫的事情。那么关于雾霾,你知道多少呢?雾霾的成分雾霾,其实是雾和霾的合体,但是雾和霾的区别很大。雾是由大量悬浮在近地 Students, do not know if we still remember last winter, how many times did we stop the courses? Presumably everyone still remembered that the reasons should not be forgotten. That is the two horrifying words: haze. The appearance of haze has seriously affected our lives, so protecting the environment is even more an urgent matter. So on the haze, you know how much it? Haze composition Haze, in fact, is a combination of fog and haze, but the fog and haze are very different. The fog is suspended in large quantities by the ground