Water fog from an all-purpose nozzle may be used to（）. ["fight an electrical fire","fight a magnesium fire","eliminate smoke from a compartment","All of the above"]
组织活动中最基本的要素是（）。 ["岗位","人","职务","工作"]
事业单位缴纳失业保险费所需资金在其支出预算（）中列支。 ["社会保险费","管理费用","成本","本人工资"]
Ventilation systems connected to a compartment in which a fire is burning are normally closed to prevent the rapid spread of the fire by（）. ["convection","conduction","radiation","spontaneous combustio"]
信用评分模型的关键在于（）。 ["辨别分析技术的运用","借款人特征变量的当前市场数据的搜集","借款人特征变量的选择和各自权重的确定","单一借款人违约概率及同一信用等级下所有借款人违约概率的确定"]
描述焊缝形状尺寸的参数有哪些？
