极不均匀电场中,当外加电压低于击穿电压时,尖极附近因局部场强过高产生的电晕放电,属于非自持放电范畴。( )(0.5)
发布时间:2025-11-29
A.正确
B.错误
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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69423' and id < 4495279 and id<>'4495279' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69423' and id > 4495279 and id<>'4495279' order by id asc limit 5
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