为什么湿热灭菌比干热灭菌的效力好？
In any diesel engine closed freshwater cooling system, the lowest pressure exists at the （）. ["jacket water outlet","cooling water pump outlet","heat exchanger outlet","expansion tank atmospheric vent"]
需要另外预计现金支出才能参加现金预算汇总的预算是（） ["销售预算","人工预算","期间费用预算","成本预算"]
简述主动运输有何特点？
锅炉缺水是指锅炉水位低于最低水位表刻度线，在容水量较大的小型锅炉轻微缺时（）。 ["应立即给锅炉上水","应停炉","应紧急停炉","可以不作处理"]
正常生产时成型煤因故突然停产，此时炼焦应采取哪些措施？
