高中物理热学教学中 ,教师在做玻意耳定律的演示实验时 ,若采用液体物质作密封材料作实验 ,往往会得出这样的结果 :PV值随封闭气体体积 V的增大而增大 ,尤其是以挥发性强的液体物质作密封材料时 ,这种现象更为明显。针对这个问题 ,笔者曾和不少物理届同仁探讨 ,普遍认为是仪器 In the teaching of high school physics and thermals, teachers use the liquid substance as the sealing material for experiments when doing the demonstration experiment of Boyle’s law, and often come to the result that the PV value increases with the increase of the volume V of the enclosed gas. This phenomenon is even more pronounced when a highly volatile liquid material is used as the sealing material. In response to this problem, the author has discussed with many colleagues at the physical industry and generally considers it to be an instrument.