题目

阻R1＝8Ω，R2＝2Ω，要使它们消耗的功率相等，则图的甲电路中滑动变阻器阻值为_______，乙电路中滑动变阻器阻值为_________。 答案：2，820、I thought she was famous, but none of my friends have            heard of her. A. even         B. ever          C. just           D. never