磁感线是用来形象地描述磁场的曲线,下图分别描述的是条形磁铁.蹄形磁铁、通电直导线、环形电流的磁感线分布,其中正确的是 a. B. C Template




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tomski磁感线是用来形象地描述磁场的曲线,下图分别描述的是条形磁铁.蹄形磁铁、通电直导线、环形电流的磁感线分布,其中正确的是 a. b. coloring