A.1.00,18.09% B.0.055,17.0% C.0.0177,5.53% D.0.180,5.85%
A.18.3 B.-9.3 C.9.3 D.數(shù)值不夠,不能計(jì)算
A.4k B.2k C.1/4k D.1/2k