如图所示取一个侧壁上开孔的圆筒把橡皮膜扎在侧壁开孔上�圆筒内灌水后观察到橡皮膜会变凸这是因为 如果将圆筒移到高山上空气稀薄处橡皮 Template




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tomski如图所示取一个侧壁上开孔的圆筒把橡皮膜扎在侧壁开孔上�圆筒内灌水后观察到橡皮膜会变凸这是因为 如果将圆筒移到高山上空气稀薄处橡皮 coloring