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如图,\(\angle AOB = 160^\circ \),\(\angle BOC = 20^\circ \)。若\(OD\)平分\(\angle AOC\),则\(\angle AOD\)的大小为( )。
A.\(20^\circ \)
B.\(70^\circ \)
C.\(80^\circ \)
D.\(140^\circ \)
参考答案:B
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