如图所示,一平行�属极板竖直置于x轴负半轴某一位置,现施加一光照使得“-极板”的电子逸出。在“ 极板ab”处有一特殊�罩,它只能够接受速度以 Template


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tomski如图所示,一平行�属极板竖直置于x轴负半轴某一位置,现施加一光照使得“-极板”的电子逸出。在“ 极板ab”处有一特殊�罩,它只能够接受速度以 coloring