This article, according to the classification of the quadric, under the 17 kinds normal form of the quadric, discussed the rectilinearity of the quadric respectively.
本文根据二次曲面方程的分类，分别讨论了二次曲面在十七种标准形式下的直纹性。
This article, according to the classification of the quadric, under the 17 kinds normal form of the quadric, discussed the rectilinearity of the quadric respectively.
本文根据二次曲面方程的分类，分别讨论了二次曲面在十七种标准形式下的直纹性。
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