Look! The people _______ their homes after the earthquake. I think they _______ to normal life very soon.
如图,实数﹣3,x,3,y在数轴上的对应点分别为M、N、P、Q,这四个数中绝对值最大的数对应的点是( )
如图所示,用“碰撞实验器”可以验证动量守恒定律,即研究两个小球在轨道水平部分碰撞前后的动量关系.