气溶胶是什么？气溶胶传播为什么防不住？

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气溶胶是什么？

举个例子，芝麻撒在蜂蜜里，几乎不会沉淀。

气溶胶=芝麻

空气=蜂蜜

气溶胶是悬浮在空气中，几乎不会沉降的小颗粒。

 

冠状病毒通过气溶胶传播为什么防不住？

①长期存活

②传播距离极远

③病人的呼吸会不断产生它

④粪便也会产生

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