一个物体静止在水平桌面上下列说法中正确的是 A.物体对桌面的压力是由于桌面的形变而产生的b.物体对桌面的压力就是物体的重力c.桌面对物体 Template




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tomski一个物体静止在水平桌面上下列说法中正确的是 a.物体对桌面的压力是由于桌面的形变而产生的b.物体对桌面的压力就是物体的重力c.桌面对物体 coloring