如图所示,在地面上以速度 抛出质量为m的物体,抛出后物体落到比地面低h的海平面上。若以地面为零势能的参考平面,且不计空气阻力,则下列说法错误的是() A . 物体落到海平面时的重力势能为 B . 从抛出到海平面的运动过程,重力对物体做的功为 C . 物体落到海平面时的动能为 D . 物体落到海平面时的机械能为 Jane accidentally where she had hidden the birthday present for her mother. A. turned out B. let out C. came out D. took out