无产阶级世界观的特征是() ["内容的丰富性和科学性","系统性和一贯性","概括性和具体性","稳定性和可变性","与行为的一致性"]
二段式煤气发生炉基本组成是什么?
A long blast to warn the vessels()vicinity. ["in","on","at","for"]
各层次高度及温度以及作用什么?
CO2 cylinder weighed()normal weight. ["light than","lighter","light","lighter tha"]
总层高度应维持在什么范围?目的是什么?