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在真空中同一平面内,有两个置于不同位置的电流元I1dl1和I2dl2,它们之间相互作用力大小相等,方向相反的条件是()。
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更多 “在真空中同一平面内,有两个置于不同位置的电流元I1dl1和I2dl2,它们之间相互作用力大小相等,方向相反的条件是()。” 相关考题
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一个物体上的作用力系,满足()条件,就称这种力系为平面汇交力系。A、作用线都在同一平面内,且汇交于一点B、作用线都在同一平面内,但不交于一点C、作用线在不同一平面内,且汇交于一点D、作用线在不同一平面内,且不交于一点
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单选题一个物体上的作用力系,满足()条件,就称这种力系为平面汇交力系。A
作用线都在同一平面内,且汇交于一点B
作用线都在同一平面内.但不交于一点C
作用线在不同一平面内,且汇交于一点D
作用线在不同一平面内,且不交于一点
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