摘要: 如图3-64.点A.D.G.M在半圆O上.四边形ABOC.DEOF.HMNO均为矩形.设BC = a.EF = b.NH = c.则下列各式中正确的是( ), A. c < b < a B. c < a < b C. a < c < b D. a = b = c

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