单项选择题
A.5%和5.10% B.6%和5.10% C.5%和6.15% D.6%和6.15%
A.6.71% B.6.77% C.6.80% D.6.83%
A.股利率 B.贷款利率 C.社会折现率 D.社会平均资金利润率