单项选择题
A.24 B.25 C.26 D.27
A.15000 B.20000 C.25000 D.50000
A.15000 B.20000 C.25000 D.30000
A.70 B.80 C.90 D.100
A.0.50 B.0.65 C.0.80 D.0.85
A.0.5%~1% B.2%~3% C.3%~5% D.5%以上
A.2.9 B.3.4 C.4.2 D.5.3
A.2.3 B.3.1 C.3.2 D.4.3
A.2.2 B.3.1 C.3.2 D.4.3
A.80 B.90 C.100 D.110
A.100000 B.20000 C.300000 D.400000
A.20000 B.200000 C.30000 D.300000
A.100000 B.200000 C.300000 D.400000
A.10 B.20 C.30 D.40
A.2.0 B.3.0 C.3.6 D.4.0
A.15 B.16 C.17 D.18
A.10.5 B.11.0 C.11.2 D.12.6
A.1.032 B.1.034 C.1.036 D.1.124
A.2.9 B.3.0 C.3.6 D.4.0