题目

(base), my knowledge of physics is pretty limited. 答案：【1】Basically如图，在△ABC中，∠ＡＢＣ和∠ＡＣＢ的平分线交于点Ｏ，若∠ＢＯＣ＝120°，则∠Ａ的度数为A.40°B.50°C.60°D.120°