A.尖端放電 B.吸收雷電 C.產(chǎn)生同性電場(chǎng) D.產(chǎn)生異性電場(chǎng)
A.0.1 B.0.2 C.0.3 D.0.5
A.0.1 B.0.5 C.1 D.1.5