悬浮燃烧
参考答案：
原煤首先被磨成煤粉，然后通过燃烧器随风吹入炉膛进行悬浮燃烧。这种燃烧方式同样用来燃烧气体和液体燃料。
We have many cases where hard work as well as good communication skills have _____ one's
chances of success in the past years. [ ]
A. lessened
B. multiplied
C. combined
D. motivated
起重轨道车装卸作业时，必须指派有（）的施工负责人做现场指挥，指定专人（）。
