[单选题]某实验室对四种 10cm 气体间隙施加直流电压，击穿电压最低的是（ ）。(每题 0.5分)（0.5）

试卷相关题目

SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69425' and id < 4495548 and id<>'4495548' order by id desc limit 5 SQL Error: select id,body,options from ***_enewstiku_ where sourceid='69425' and id > 4495548 and id<>'4495548' order by id asc limit 5