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(2007•长春)如图,△AOB中,∠B=30°.将△AOB绕点O顺时针旋转52...
(2007•长春)如图,△AOB中,∠B=30°.将△AOB绕点O顺时针旋转52°得到△A′OB′,边A′B′与边OB交于点C(A′不在OB上),则∠A′CO的度数为( )
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A.22°
B.52°
C.60°
D.82°
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