2012 Shanghai Question 8 Free-response Differentiating 2012_上海 Paper 8.如图,光滑斜面固定于水平面,滑块 A、B叠放后一起冲上斜面,且始终保持相对静止,A上表面水平。则在斜面上运动时,B受力的示意图为(B)(D) Answer keyA ☆ SaveCan't do it, show the explanation查看原卷 →