四棱锥的投影 有两面投影外轮廓一定是三角形()。 There are two side views having triangles for

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四棱锥的投影,有两面投影外轮廓一定是三角形()。 There are two side views having triangles for the projection of a square pyramid.

四棱锥的投影 有两面投影外轮廓一定是三角形()。 There are two side views having triangles for

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