A.1/(7υmax) B.1/(8υmax) C.1/(9υmax) D.1/(10υmax)
A.減小Hg(未被平衡過超高) B.增大Hg(未被平衡過超高) C.減小Hc(未被平衡欠超高) D.增大Hc(未被平衡欠超高)