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初二《物理》第108页图5—19,是研究液体内部压强随深度的增加而增加的演示实验。用一张画有黑红相间条格的白纸(每格宽一厘米),贴在水
Figure 5-19 on page 108 of “Physics” in the second day of the second year is a demonstration experiment to study the increase of the internal pressure of a liquid as the depth increases. Use a piece of white paper (one centimeter in width) painted with black and red stripes on the water.