天平是测量物体质量的基本工具。正确使用方法是 :把被测物体放在天平左盘里 ,用镊子向右盘里加减砝码并调节游码在标尺上的位置 ,直到横梁平衡。右盘中砝码的总质量加上游码在标尺上所对的刻度值 ,就等于被测物体的质量。由于许多资料上 ,常常出现将物体放在天平的右盘称得某 A balance is the basic tool for measuring the quality of an object. The correct method of use is to place the object under test on the left side of the balance, use a tweezer to add or subtract weights to the right plate and adjust the position of the code on the scale until the beam is balanced. The total weight of the weight in the right disk plus the scale value of the rider on the scale is equal to the mass of the object being measured. Because of the large amount of data, it often happens that the object is placed on the right side of the scale