A. 室内存在呼吸道疾病患者 B. 室内清扫方式不合理 C. 人员密集、通风不良、尘埃量大 D. 室内空气消毒不好
A. ECAM(Extended Channel Assignment Messag B. ESCAM(Extended Supplemental Channel Assignment Messag C. PSMM(PilotStrength Measurement Messag D. HDM(Handoff Direction Messag