A.逐次增大 B.任意 C.逐次減小 D.選擇負(fù)載點(diǎn)
A.1.31%~1.49% B.1.30%~1.49% C.1.35%~1.50% D.1.30%~1.50%
A.―0.5% B.―0.6% C.―0.55% D.―0.4%