法向量总算错？教你一招，十秒秒杀所有法向量！
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| MP4 | N/A | 480P | Download |
| MP4 | N/A | 480P | Download |
| MP4 | N/A | 480P | Download |
| MP4 | N/A | 360P | Download |
| MP4 | N/A | 360P | Download |
| MP4 | N/A | 360P | Download |
| AUDIO | |||
| MP4 | N/A | mp4a.40.2 | Download |
| MP4 | N/A | mp4a.40.5 | Download |
| MP4 | N/A | mp4a.40.2 | Download |
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本方法利用了向量卷积的意义，涉及线性代数的知识，高考不能直接使用，赶时间的话可以假装用正常方法后用叉乘直接算出答案，一般用该方法对常规方法所得答案进行检验。
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