求翻译：一是注意用火，用电安全。二是及时拨打火警电话，三是掌握一些基本自救知识：如用湿毛巾捂住口鼻等是什么意思？

Is the note with the fire and electrical safety. Second, timely fire calls, third is to master the basic self-help knowledge: as with wet towel and covered her mouth and nose