一物体静止在斜面上下面说法正确的是 A.物体受斜面的作用力垂直斜面�上b.物体所受重力可分解为平行于斜面的下�力和对斜面的正压力c Template




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tomski一物体静止在斜面上下面说法正确的是 a.物体受斜面的作用力垂直斜面�上b.物体所受重力可分解为平行于斜面的下�力和对斜面的正压力c coloring