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original poster: 走走看看

[几何] 请大师们看看向量这个怪兽

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isee posted 2018-12-29 19:24

回复 19# 游客

一般把结尾的标号符号放公式外，多说一句

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original poster 走走看看 posted 2019-1-4 21:02

回复 20# 游客

谢谢游客大师！谢谢大家！

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