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一、问题的提出水平方向的匀强磁场区域足够大,如图1所示,将一带正电粒子(重力不可忽略)自磁场中M点由静止释放,它的运动情况是()
First, the problem is proposed Horizontal uniform magnetic field area is large enough, as shown in Figure 1, the positive particles (gravity can not be ignored) M field from the static release, its motion is ()