A.0.50 B.0.55 C.0.60 D.0.65
A.年保證率,90%~95% B.歷時(shí)保證率,95%~97% C.年保證率,95%~97% D.歷時(shí)保證率,90%~95%
A.峰荷 B.腰荷 C.基荷 D.腰荷與峰荷