题目

The students from Class One is one of _________ in our school. A. better guitar players    B. the best guitar players   C. the best guitar player 答案：B如图所示，一小球在光滑的V形槽中由A点释放，经B点（与B点碰撞所用时间不计）到达与A点等高的C点，设A点的高度为1m，则全过程中小球通过的路程和位移大小分别为（ ）A. B. C. D