摘要:4. 如图2.点A.D.G.M在半⊙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.a>b>c B.b>c>a C.c>a>b D.a=b=c

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