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如图.在菱形ABCD中,对角线AC,BD相交于点O,H为AD边中点.若菱形ABCD的周长为28,则OH的长为( )A.3.5 B.4 C.7 D.14
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教案备课库《初三年级数学同修学案(201532022B)》真题及答案
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