A.點(diǎn)燃時(shí)，先開(kāi)助燃?xì)?，后開(kāi)燃?xì)?；熄滅時(shí)，先關(guān)燃?xì)?，后關(guān)助燃?xì)狻?br /> B.點(diǎn)燃時(shí)，先開(kāi)燃?xì)?，后開(kāi)助燃?xì)猓幌鐣r(shí)，先關(guān)燃?xì)猓箨P(guān)助燃?xì)狻?br /> C.點(diǎn)燃時(shí)，先開(kāi)助燃?xì)猓箝_(kāi)燃?xì)?；熄滅時(shí)，先關(guān)助燃?xì)猓箨P(guān)燃?xì)狻?br /> D.點(diǎn)燃時(shí)，先開(kāi)燃?xì)猓箝_(kāi)助燃?xì)?；熄滅時(shí)，先關(guān)助燃?xì)?，后關(guān)燃?xì)狻?/p>