各种复习资料、测验、考试题中,对矢量值的称谓叫法不一,诸如;“矢量的大小”、“矢量的绝对值”、“矢量的数值”、“矢量的数量”、“矢量的量值”等等,由于不同教师对各种称谓的含义理解上存在差异,常常给习题和测验的答案造成混乱。因此,有必要对此取得共识,让各种称谓含义明确,规范统一。 矢量是既有大小又有方向的量,对矢量值的称谓、归根结底只有两种: 1、矢量的绝对值:即矢量的大小(只取正值),在中 In various review materials, tests, and test questions, the names of vector values ​​are called differently, such as; “the size of vector”, “absolute value of vector”, “value of vector”, “number of vectors”, "vector The magnitude of “etc.”, because different teachers have different understandings of the meanings of various titles, often give confusion to the answers to exercises and quizzes. Therefore, it is necessary to reach a consensus on this, so that the meaning of various titles is clear and standardized. Vector is the amount of both size and direction, the name of the vector value, in the end there are only two: 1, the absolute value of the vector: the size of the vector (only positive value), in