把煤做成蜂窝煤是为请选择ABCD9a/v-?7j)L9};}.z1T9g-G9F1\+[8b4f-?0y;J
A．降低着火点9g-G9F1\+[8b4f-?0y;J
B．散热面积大9g-G9F1\+[8b4f-?0y;J
C．方便运输9g-G9F1\+[8b4f-?0y;J
D．使煤和空气充分接触9g-G9F1\+[8b4f-?0y;J