如图所示根据通电螺线管的磁感线方�可判断通电螺线管左端为 极电源的a端为 极小磁针静止时的b端为 极 A 南正北b北负北 Template




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Try and sketch some of theseStethoscope, Keg, Poet, Snowmobile, Fishhook, Acrobat, Spices, Candle, Witch, Palm tree, view more ideas


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tomski如图所示根据通电螺线管的磁感线方�可判断通电螺线管左端为 极电源的a端为 极小磁针静止时的b端为 coloring