在中学物理教学中,经常用到图1所示的实验来说明大气压强的存在(以下称“压强说”),在《物理通报》1997年第9期,杨雄生先生称之为“试管旅行”实验。近期有些教师提出使小试管上升的原因是浮力(以下称“浮力说”),笔者以为这种说法欠妥。 In middle school physics teaching, the experiment shown in Fig. 1 is often used to illustrate the existence of atmospheric pressure (hereinafter referred to as “pressure theory”). In the 9th issue of the “Physics Bulletin,” 1997, Mr. Yang Xiongsheng called it “Test tube travel” experiment. Recently, some teachers have suggested that the reason for the rise of the test tube is buoyancy (hereinafter referred to as “buoyancy”). The author thinks that this statement is not appropriate.