单项选择题
A.21.61% B.22.05% C.23.53% D.24.15%
A.0.5% B.1% C.1.2% D.1.5%
A.20 B.24 C.26 D.32
A.475万元 B.500万元 C.615万元 D.525万元
A.2 B.3 C.4 D.5
A.3:2 B.4:3 C.5:4 D.7:6
A.12 B.14 C.15 D.16
A.16:00 B.16:30 C.17:00 D.17:30
A.200 B.150 C.100 D.50
A.1.5 B.2 C.2.5 D.3