单项选择题
A.0.10 B.9.00 C.10.00 D.0.75 E.0.90
A.152 B.90 C.72 D.20 E.2
A.350/400=87.5% B.300/400=75.0% C.100/400=25.0% D.100/300=33.3% E.50/400=12.5%