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八年级《物理》(人教版)下册课本第51页“动手动脑学物理”第6题:在家庭电路中,导线相互连接处往往比别处更容易发热,加速老化,甚至引起火灾.这是为什么?
Volume 8, Volume 8, page 51 “Hands-On Brain Physics” Issue 6: In home circuits, wires are often more susceptible to heat, aging and even fire than others .Why is that?