A.多1成 B.多7.7% C.少6.3% D.少7.7%
A.Ⅰ、Ⅲ B.Ⅱ、Ⅲ C.Ⅰ、Ⅱ、Ⅲ D.Ⅰ、Ⅱ
A.6.3 B.9.9 C.5.7 D.15.9
A.50% B.51% C.50.5% D.51.5%