A.3%或8m,8% B.5%或10m,8% C.5%或8m,8% D.3%或10m,10%
A.1/96 B.1/48 C.1/24 D.1/12
A.3,0.8,450,600 B.2,1,450,600 C.3,1,230,380 D.2,0.8,230,380