要对物体的质量、长度、温度等作出准确的判断，得到精确的数据，必须进行测量．在这些测量中，最基本的测量是长度测量，而测量长度的基本工具是刻度尺．因此，如何正确使用刻度尺去测量物体的长度．是得出物体K度精确数据的关键，也是我们今后学会使用其它测量仪器和了解测量 To make accurate judgments on the quality, length, temperature, etc. of an object and obtain accurate data, measurements must be made. In these measurements, the most basic measurement is length measurement, and the basic tool for measuring length is the scale. Therefore, how to use the scale correctly to measure the length of the object. It is the key to get the accurate data of the K-degree of the object. It is also that we will learn to use other measuring instruments and understand the measurement in the future.