A.主線系B.第二輔線系C.第一輔線系D.柏格漫線系
A.3P0,1,2,3S1 B.3P0,1,2,1S0 C.1P1,3P0,1,2 D.3S1,1P1
A.0 B.2.14×10-3 C.2.07×10-3 D.3.42×10-2