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在Rt△ABC中,∠ACB=90°,CD⊥AB,则下列等式一定不成立的是( ) ...
在Rt△ABC中,∠ACB=90°,CD⊥AB,则下列等式一定不成立的是( )
A.AC2=AD•AB
B.BC2=BD•AB
C.AB2=AC•BC
D.CD2=AD•BD
考点分析:
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