变电 站电 气主接线 是指变电 站的变压 器、输电线 路怎样 与电 力系统 相连 接,从而完成输 配电 任务 。变电 站的主接线 是电 力系统 接线组 成中一个重要组 成部分定语从句变电 站电 气主接线 是指变电 站的变压 器、输电线 路怎样 与电 力系统 相连 接,从而完成输 配电 任务 。变电 站的主接线 是电 力系统 接线组 成中一个重要组 成部分定语从句的三大特征 They are a special kind of doctors who operate on sick people . They repair the organs that no longer work properly. They want to get the same kind of clothes as these fashion models wear. Businessmen usually work in an office, where they plans business activities. I lived in the room whose window faces south.