問題詳情
49 Why are ventilatory tactics critical in firefighting?
(A) They provide entertainment for onlookers.
(B) They facilitate the introduction of more oxygen to strengthen the fire.
(C) They adjust the inflow and outflow of gases to prevent backdrafts.
(D) They allow firefighters to take more breaks.
參考答案
答案：C
統計：A:1,B:6,C:8,D:1,E:0
難度：計算中