如图是常见的可调亮度的台灯和电路原理图是通过旋钮式�动变阻器来调节台灯的亮度下面关于这种台灯的说法正确的是a.变阻器和灯泡是并联的b.灯光 Template




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tomski如图是常见的可调亮度的台灯和电路原理图是通过旋钮式�动变阻器来调节台灯的亮度下面关于这种台灯的说法正确的是a.变阻器和灯泡是并联的b.灯光 coloring