單項(xiàng)選擇題發(fā)現(xiàn)火災(zāi)時(shí),應(yīng)及時(shí)按下附近的輸出火警信號(hào)。()

A.緊急疏散開(kāi)關(guān)
B.緊急斷電開(kāi)關(guān)
C.火災(zāi)報(bào)警按鈕