不属于消化道隔离的是() ["霍乱","伤寒","甲型肝炎","脊髓灰质炎","麻疹"]
流行性出血热的主要感染源是() ["蝇类","虱类","鼠类","禽类","蟑螂"]
Ⅱ类环境空气消毒所用消毒器的循环风量(m3/h)必须是房间体积的() ["2倍以上","4倍以上","6倍以上","8倍以上","10倍以上"]
冲天炉由哪几部分组成?各部分作用是什么?
用于新生儿脐带消毒的碘伏,有效碘含量是() ["50mg/L","250mg/L","500mg/L","2500mg/L","5000mg/L"]
冲天炉的技术经济指标有哪些?