A.20-30s B.30-40s C.40-50s D.40-60s
A.咳嗽、打噴嚏時應(yīng)用紙巾或屈肘遮掩口鼻,用過的紙巾放入有蓋的垃圾桶內(nèi) B.咳嗽、打噴嚏時應(yīng)用雙手遮掩口鼻 C.打噴嚏的紙巾可隨意丟棄 D.最后用清水徹底清洗雙手