在一些办公室、公共场所和家庭中的墙壁上,都每每挂有一支温度计,沿着温度计玻璃管的两边,都印有一个分度尺,尺的分度线旁标有数码,人们就从玻璃管内的液面所对着的分度线观测出室温的高低。这种指示温度高低的标尺,就叫做温标。它是怎样定出来的呢? In some offices, public places and families in the walls, are often hung a thermometer, along the thermometer on both sides of the glass tube, are printed with a sub-degree scale, sub-degree line ruler marked with digital, people from the glass The liquid level in the tube is opposite to the index line to observe the level of room temperature. This indicates the temperature level of the ruler, called the temperature scale. How is it fixed?