刻度尺是测量长度的基本工具，根据不同需要，刻度尺又有多种。如直尺。卷尺、游标卡尺、螺旋测微器等。要做到正确使用，必须掌握以下七个问题．1．会选应先根据实际情况确定测量需要达到的准确程度，然后再根据要求选用适当的测量工具．例如，测量跳远成绩，要求准确到厘米， The scale is a basic tool for measuring length. There are many scales depending on the needs. Such as a ruler. Tape measure, vernier caliper, spiral micrometer and so on. To be used correctly, you must master the following seven issues. 1. The election should be based on the actual situation to determine the accuracy required to achieve the measurement, and then use the appropriate measurement tools according to the requirements. For example, measuring long jump performance requires accuracy to centimeters.