A.Al、Si、Mn B.Si、Mn、Al C.Mn、Al、Si
A.1450~1530℃;1100~1150℃ B.1100~1150℃;1450~1530℃ C.1100~1150℃;1100~1150℃ D.1450~1530℃;1450~1530℃
A.下降,提高 B.下降,下降 C.提高,下降 D.提高,提高