燃烧的类型包括闪燃、着火、自燃、爆炸。
参考答案：对
It took us ____ to finish the new work.
A. three hour and a half B. three and a half hour C. three and a half hours
海运联运特点是______。
A．航线随机
B．单程运输
C．远距离运输
D．航线固定
