-2 The international system of units cGPM(国际度量衡大会) selected as base units the seven quantities displayed in Table 1-1. This is the basis of the International System of Units abbreviated sl1-2 The international system of units CGPM(国际度量衡大会) selected as base units the seven quantities displayed in Table 1-1. This is the basis of the International System of Units, abbreviated SI