CH23 CH23-Gauss’s Law 高斯定律 CH23-教學影片 CH23-影片01 CH23-影片02 CH23-影片03 CH23-影片04 CH23-影片05 CH23-影片06 CH23-影片07 CH23-影片08 CH23-影片09 CH23練習題、習題解答