RememberthewordPASSwhenusingafireextinguisherandholdextinguisherwithnozzlepointedawayfromyou.Aimlow,pointingtothebaseofthefire.slowlyandevenly.Sweepthenozzlefromsidetoside.

  尔雅 智慧树 mooc


+
账户
更新
搜索
帮助
主页