一只实心的正方体均质木块放在水平桌面上如图所示对桌面的压强为p若沿虚线将其分成ab两块拉开一小段距离它们对桌面的压强分别为pa Template




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tomski一只实心的正方体均质木块放在水平桌面上如图所示对桌面的压强为p若沿虚线将其分成ab两块拉开一小段距离它们对桌面的压强分别为pa coloring