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已知四边形ABCD中,∠A=∠B=∠C=90°,如果添加一个条件,即可推出该四边...
已知四边形ABCD中,∠A=∠B=∠C=90°,如果添加一个条件,即可推出该四边形是正方形,那么这个条件可以是( )
A.∠D=90°
B.AB=CD
C.AD=BC
D.BC=CD
考点分析:
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