A.30 B.40 C.60 D.100
A.15B.25C.35D.50
A.手动 B.自动 C.机械
A.1 B.2 C.3 D.4
A.30 B.40 C.50 D.60
A.1B.2C.3D.4
A.20% B.30% C.40% D.50%
A.20 B.30 C.40 D.50
A.小于 B.等于 C.大于
