当毛皮从验电器旁边拿走后，金箔又恢复原来的角度。

When the fur is removed from the vicinity of the electroscope , the leaves return to the original angle.

youdao

当毛皮从验电器旁边拿走后，金箔又恢复原来的角度。

When the fur is removed from the vicinity of the electroscope , the leaves return to the original angle.

youdao