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如图，\(OB\)是\(\angle AOC\)的角平分线，\(OD\)是\(\angle COE\)的角平分线．
若\(\angle AOC = {70^ \circ }\)，\(\angle COE = {50^ \circ }\)，求\(\angle BOD\)的度数；
参考答案：\(60^\circ \)
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