单项选择题
A.234.66 B.250.50 C.280.00 D.293.86
A.2.00%,8.24% B.2.00%,8.00% C.2.06%,8.00% D.2.06%,8.24%
A.5%和5.10% B.6%和5.10% C.5%和6.15% D.6%和6.15%