物态变化一章中的主要知识点,可用下面口诀作概括.常用液体温度计,热胀冷缩是原理;读数要从零读起,负值读取要注意.物态变化有六种,熔汽升,液双凝; The main points of knowledge in the chapter on change of state of matter can be summarized below. Commonly used liquid thermometers, thermal expansion and contraction is the principle; readings should be read from zero, negative values ​​should be noted. There are six changes in the state of matter, melting Steam rise, liquid double condensate;