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人民教育出版社出版的全日制普通高级中学教科书(必修)(即实验教材或叫新教材)关于两个向量平行(也称共线)给出了两个充要条件.本文针对这两个充要条件的教学谈点看法.1关于在实数与向量的积的意义下的充要条件在定义了实数与向量的积的意义后,课本给出了两个向量共线的充要条
The full-time regular high school textbooks (required) published by the People’s Education Press (required as experimental textbooks or new textbooks) give two necessary and sufficient conditions for two parallel vectors (also called collinears). To talk about the conditions of teaching. 1 On the necessary and sufficient conditions in the sense of the product of real numbers and vectors. After defining the meaning of the product of real numbers and vectors, the textbook gives a full complement of the two collinear vectors.