A.50% B.30% C.80% D.100%
A.1 B.2 C.3 D.6
A.XR甲乙丙 B.XD甲乙丙 C.DR甲乙丙 D.N甲乙丙
A.1 B.2 C.3 D.4
A.60万股 B.120万股 C.180万股 D.240万股