降低回流槽的压力,对精馏塔的影响是()。 ["A、塔温下降","B、塔压下降","C、塔釜液位上升","D、塔釜液位下降"]
步法移动要求“疾”指:(). ["灵活敏捷","移动稳定性强","移动迅速","重心高"]
恒定表面浓度的条件下,在整个扩散期间,()保持恒定表面浓度。 ["源蒸气","杂质和惰性气体混合物","水蒸气和杂志混合物","杂质、惰性气体、水蒸气混合物"]
()起保持系统压力稳定,当系统过载时,起安全保护作用。 ["流量阀","减压阀","分流阀","溢流阀"]
步法移动要求“准”指:(). ["步法移动的准确性高","灵活敏捷","移动迅速","重心低"]
规范的货运险共保业务应符合什么要求?