将一个直角三角板的一条直角边垂直于水平桌面,再绕这条边所在直线旋转一周,则旋转后所得几何体的主视图是________ 形.
更新时间:2016-12-06 01:08:36
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【推荐1】如图,
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【推荐2】如图,在平面直角坐标系
中,点A坐标为
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【推荐1】如图是一圆锥,在它的三视图中,既是中心对称图形,又是轴对称图形的是它的_____ 视图(填“主”,“俯”或“左”).
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【推荐2】桌面上放着一个三棱锥和一个圆柱体,在下图中填上它的视图的名称:
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________ 视图________ 视图________ 视图.
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