在进行检查性手选时,手选带式输送机速度不应超过()m/s。 ["A、0.3 ","B、0.4 ","C、0.5 ","D、0.6"]
交通运输执法风纪的总体要求() ["着装整齐","仪容端庄","举止文明","风纪严整"]
某设备4年前的原始成本为10000元,目前的账面价值是4000元,可变现净值为1500元,在进行设备更新分析时,应视为该设备沉没成本的是()元 ["2500","8500","10000","1500"]
脉冲布袋除尘器的净化效率是()。 ["99.9%","99.0%","90.0%","85.0%"]
经分选后得到的灰分介于精煤和矸石之间的选煤产物叫() ["精煤","中煤","煤泥","矸石"]
劳动力市场的力量