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答案洛伦兹力提供向心力QBV=mV^2/RR为D型盒的半径,V为最大速度Ek=(mV^2)/2=(QBR)^2/2m所以最大动能与电场(dian chang)无关相关推荐1有关回旋加速器推导公式(为什么所达到的能量与电场(dian chang)无...