用一个平面去截正方体,圆锥,圆柱和三棱柱其能够截出三角形的是
用一个平面去截正方体,圆锥,圆柱和三棱柱其能够截出三角形的是
数学人气：660 ℃时间：2020-02-03 18:00:50
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正方体,圆锥,三棱柱都行,看你怎么截
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