为达到最好的消毒效果,环氧乙烷消毒仓内相对湿度最好保持在()。 ["10%~20%","20%~30%","30%~40%","40%~50%","60%~90%"]
产生从众行为的是() ["群体意识","群体压力","群体倾向","舆论领袖","群体凝聚力"]
制备胶制时加入明矾的目的是() ["A.增加胶剂硬度","B.增加胶的透明度","C.沉淀胶液中泥土等杂质","D.降低黏性","E.便于切割"]
胶剂的水分不得超过() ["A.5.0%","B.10.0%","C.12.0%","D.15.0%","E.20.0%"]
常见皮肤化学性灼伤的化学物质是()。 ["氢氧化钠","氧化钙","焦油、沥青","苯酚","氯化锌"]
填写工作票前,工作负责人应熟悉工作现场,确保安全措施()、()。