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试题详情及答案解析
已知:如图,△ABC≌△DEF,AC∥DF,BC∥EF.则不正确的等式是 (    ).
A.AC=DFB.AD=BEC.DF=EFD.BC=EF
答案:C.
试题分析:A、∵△ABC≌△DEF,∴AC=DF,故此结论正确;
B、∵△ABC≌△DEF,∴AB=DE;∵DB是公共边,∴AB-BD=DE-BD,即AD=BE;故此结论正确;
C、∵△ABC≌△DEF,∴AC=DF,故此结论DF=EF错误;
D、∵△ABC≌△DEF,∴BC=EF,故此结论正确;
故选:C.
考点:三角形全等的性质.