单项选择题
(A)风向 (B)火场湿度 (C)燃烧周长 (D)出动人员
(A)上风 (B)下风 (C)侧风 (D)四周
(A)1~2min (B)2~4min (C)3~5min (D)5~7min
微信扫一扫,加关注免费搜题