“验电器”造句

图4 - 2就是目前实验室里的验电器样式.
Figure 4 - 2 shows a present - day laboratory version of the electroscope.

验电器的叶片慢慢张开.
The leaves of the electroscope slowly diverge.

图 4-2 就是目前实验室里的验电器样式.
Figure 4 - 2 a present - day laboratory version of the electroscope.

• #验电器