在用“玻玻杯盛水倒置实验”验证大气压强的存在时,若用一略大于玻璃杯口的薄玻璃片代替厚纸片,则演示效果更好。其优点是:①用玻璃片盖盛满水的杯子时,易于发现玻璃片与水之问是否留有气泡,使实验易做成功。②用厚纸片演示,某些学生误认为纸片是被水沾住的。改用玻璃片演示时,玻璃杯稍稍倾斜,玻璃片则在杯口下滑功而 When verifying the presence of atmospheric pressure with the “glass-glass cup water inversion experiment”, if a thin glass piece slightly larger than the glass mouth is used instead of the thick paper piece, the demonstration effect is better. Its advantages are: 1 When glass cups are used to cover cups filled with water, it is easy to find whether the glass sheets and water are left with bubbles, making the experiment easy to succeed. 2 Demonstration with thick paper, some students mistakenly believe that the paper is stained with water. When changing to glass presentations, the glass is slightly tilted and the glass slides down the cup