单项选择题
A.∑h=SQ B.∑h=SQ2 C.∑h=S/Q2 D.∑h=S/Q
A.变化较陡 B.不变化 C.变化较平缓 D.变化高低不平
A.100% B.80% C.30% D.15%
A.Hss+Hsd B.Hs+Hsv C.HST+Hsv D.Hd+Hv
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