第五章“压强” 这一章讲授固体、液体和气体压强的知识。要求学生掌握压强的概念,液体压强的知识,认识大气的压强。全章可分三个单元,一、二节为第一单元,讲授压强的概念;三～九节为第二单元,讲授液体的压强,十～十三节为第三单元,讲授大气的压强。 Chapter 5 “Pressures” This chapter teaches the knowledge of solid, liquid, and gas pressures. Students are required to grasp the concept of pressure, the knowledge of liquid pressure, and recognize the pressure of the atmosphere. The whole chapter can be divided into three units. The first and second sections are the first unit to teach the concept of pressure; the third to the ninth section are the second unit to teach the pressure of the liquid, and the tenth to thirteenth days are the third unit to teach the pressure of the atmosphere. .