“相位”内容在以前的人教版本中属于选学内容,对这部分内容的教学,往往是点到为止,甚至是将其忽略过去.在人教新课标3-4的教材中“相位”内容改为必修,在教材中的地位和分量都有所提高.而相位的概念对于理解简谐运动又具有非常重要的作用,所以在教学中应给以充分重视.由于相位的概 “Phase ” content in the previous version of the PEP belongs to the elective content, the teaching of this part of the content is often to the point, or even ignore it in the past. The content and the content of “phase” are changed to compulsory, and their status and weight have been raised in the textbook, while the concept of phase plays a very important role in understanding harmonic movement, so full attention should be given in teaching. The outline of the phase