伤亡发生的直接原因有哪些?
1)顺风逃生; 2)向未燃烧的山上逃生 3)经鞍部逃生; 4)由山上向山下接近火头(场); 5)翻越山脊线、鞍部接近火场; 6)迎风接近火头。
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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