灯泡的结构是怎样的?是一根电阻丝加一根导线吗?
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![灯泡的结构是怎样的?是一根电阻丝加一根导线吗?](/uploads/image/z/9504309-21-9.jpg?t=%E7%81%AF%E6%B3%A1%E7%9A%84%E7%BB%93%E6%9E%84%E6%98%AF%E6%80%8E%E6%A0%B7%E7%9A%84%3F%E6%98%AF%E4%B8%80%E6%A0%B9%E7%94%B5%E9%98%BB%E4%B8%9D%E5%8A%A0%E4%B8%80%E6%A0%B9%E5%AF%BC%E7%BA%BF%E5%90%97%3F)
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