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如图,E、F分别是正方形ABCD的边BC、CD上的点,BE=CF,连接AE、BF...
如图,E、F分别是正方形ABCD的边BC、CD上的点,BE=CF,连接AE、BF.将△ABE绕正方形的中心按逆时针方向旋转到△BCF,旋转角为α( 0°<α<180°),则∠α=
.
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B.
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C.
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