圓有無數(shù)條對稱軸,直徑所在的直線是圓的對稱軸;
故答案為:無數(shù),直徑所在的直線.
圓有_條對稱軸,_是圓的對稱軸.
圓有______條對稱軸,______是圓的對稱軸.
其他人氣:316 ℃時間:2020-06-08 10:29:46
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