某固体绝缘材料在进行耐压试验时，施加电压瞬间即发生击穿，且击穿点无明显发热痕迹，该击穿类型为（ ）（0.5）

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SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69421' and id < 4494882 and id<>'4494882' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69421' and id > 4494882 and id<>'4494882' order by id asc limit 5