A.5.6A,超出 B.7.84A,不超出 C.4.0A,超出 D.10.19A,不超出
A.4.0%,5.0% B.1.2%,3.0% C.3.2%,4.0% D.2.4%,3.0%
A. B. C.2.0p.u,2.5p.u. D.1.3p.u.,1.4p.u.