单选题
1分
An A.C. switchboard is usually _____the corresponding D.C. board because of the higher voltage and l...
An A.C. switchboard is usually _____the corresponding D.C. board because of the higher voltage and lower currents and smaller bus-bars.
参考答案: B
参考解析: 由于高电压、低电流和小汇流排的原因,交流配电板比相应的直流配电板体积更小,重量更轻。