白炽灯的灯丝通常在刚通电瞬间被烧断这是由于刚通电时灯丝的温度低电阻小通过灯丝的电流大单位时间内产生热量多的缘故．灯丝烧断时�生的物态 Sketch Coloring Page

白炽灯的灯丝通常在刚通电瞬间被烧断这是由于刚通电时灯丝的温度低电阻小通过灯丝的电流大单位时间内产生热量多的缘故．灯丝烧断时�生的物态 Template

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tomski白炽灯的灯丝通常在刚通电瞬间被烧断这是由于刚通电时灯丝的温度低电阻小通过灯丝的电流大单位时间内产生热量多的缘故．灯丝烧断时�生的物态 coloring

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