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为探究电磁铁的磁性跟哪些因素有关小丽同学作出以下猜想 猜想a电磁铁通电时有磁性断电时没有磁性 猜想b通过电磁铁的电流越大它的磁性越 Template






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tomski为探究电磁铁的磁性跟哪些因素有关小丽同学作出以下猜想 猜想a电磁铁通电时有磁性断电时没有磁性 猜想b通过电磁铁的电流越大它的磁性越 coloring
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