This requires that before the experiment in the best fur, Choubu, glass, Xiangjiao Bang, electroscope, and other experimental equipment for drying so that the drying effect.

• 这就要求在实验前最好把毛皮、绸布、玻璃棒、橡胶棒、验电器等实验器材进行晾晒，使起干燥。