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向量自从被引入高中教材之后,它作为一种重要的解题工具,一直是高考的热点:向量可以用有向线段来表示,它既具有代数的特征,又
Since the vector was introduced into high school textbooks, it has been a hot topic of college entrance examination as an important tool for solving problems: Vectors can be represented by directed lines, which have both the characteristics of algebra, and