A.打密封帶B.及時(shí)撤離C.封閉現(xiàn)場(chǎng)D.切斷電源
A.一不點(diǎn)火 B.二不點(diǎn)火 C.三不點(diǎn)火 D.四不點(diǎn)火
A.5 B.10 C.15 D.20