物理教师在教学时,语言一定要科学严谨,但有的教师不注意这一点,结果造成学生概念上的错误,现举例如下,以期引起注意。⊙不但有大小而且有方向的量一定是矢量(电流强度有大小有方向,不是矢量。它的方向是相对于某一个标定方向而言的。矢量的定义是用平行四边形定则和三角形定则运算的物理量)。 Physics teachers in teaching, the language must be rigorous science, but some teachers do not pay attention to this, resulting in conceptual errors students, for example as follows, in order to attract attention. ⊙ not only the size but also the amount of the direction must be a vector (current intensity has the size of a direction, not a vector. Its direction is relative to a certain calibration direction. The definition of vector is the use of parallelogram and triangle rules Calculated physical quantity).