“陈强同学,请你列举一个动能和势能转化的例子,好吗?”我的话音刚落,正在对着镜子整理头发的陈强心惊手抖,只听“砰”的一声,镜子从手中滑落下来,掉地上摔碎了。他侧头看看同学们,极不情愿地站了起来,默默地低着头。刚才还热烈讨论着 “Chen Qiang, please, give us an example of the transformation of kinetic energy and potential energy. OK?” “My voice was just falling and Chen Qiang, who was finishing her hair in the mirror, was shivering and only heard a bang.” The mirror fell from his hand and fell to the ground and broke. He looked at his classmates sideways, stood up reluctantly, and lowered his head silently. Just now we have a lively discussion