如图一物体以某一速度冲上表面粗糙的固定斜面请画出物体所受的�擦力和物体对斜面的压力的示意图. 题目和参考答案——青夏教育精英家教�—— Template




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tomski如图一物体以某一速度冲上表面粗糙的固定斜面请画出物体所受的�擦力和物体对斜面的压力的示意图. 题目和参考答案——青夏教育精英家教�—— coloring