A.油路阻塞 B.點(diǎn)火時(shí)間過(guò)遲 C.點(diǎn)火時(shí)間過(guò)
A.正極搭鐵 B.負(fù)極搭鐵 C.正、負(fù)極搭鐵均可
A.1-2-3-4 B.1-3-4-2 C.1-4-3-2 D.4-3-2-1