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例1水平放置的容器底面积为100厘米2，装上水后底部受到的压强为2．0×103帕，当在水面上放置一木块后（水未溢出），底部受到液体的压强变为2．2×103帕．由此可知（）．A．该木块的质量一定是200克B．投入木块后水面升高2厘米C．底部受到的压力一定增加了2牛D．桌面受到的压
Example 1 The horizontally placed bottom of the container is 100 cm 2 , and the pressure applied to the bottom of the container is 2.0×10 3 Pa. When a wooden block is placed on the surface of the water (the water does not overflow), the pressure at the bottom is changed by the liquid. It is 2.2 x 103 Pa. It can be seen (). A. The mass of the block must be 200 grams B. After entering the block, the water surface rises by 2 cm. The pressure at the bottom must increase by 2 cows. D. Desktop pressure