A.0.3~0.45; B.0.6~0.9; C.1~2; D.0.2~0.4
A.混合氣過(guò)??; B.點(diǎn)火時(shí)間過(guò)遲; C.點(diǎn)火時(shí)間過(guò)早; D.點(diǎn)火正時(shí)
A.甲說(shuō)閉合角越大越好; B.乙說(shuō)閉合角越小越好; C.丙說(shuō)甲乙都不對(duì); D.丁說(shuō)甲乙都對(duì)