1.如图所示质量为lkg的物体静止在倾角为30°的斜面上�画出物体受力的示意图�物体受到静�擦力的大小为 �物体受到弹力的大小为 Template




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tomski1.如图所示质量为lkg的物体静止在倾角为30°的斜面上�画出物体受力的示意图�物体受到静�擦力的大小为 �物体受到弹力的大小为 coloring