单项选择题
A.4% B.5% C.8% D.10%
A.3% B.4% C.5% D.6%
A.2 B.4 C.6 D.8
A.0.1 B.0.2 C.0.3 D.0.4
A.P+0.3 B.P C.1.5P D.0.3
A.100 B.200 C.250 D.300
A.100 B.200 C.300 D.400
A.1—1.5 B.1.5—2 C.2—2.5 D.2.5—3
A.0.1 B.0.15 C.0.2 D.0.25
A.0.1 B.0.2 C.0.4 D.0.5
A.1 B.2 C.3 D.4