(来学网)选择电源线时,应使电源线的阻值RL、电源电阻R22m和电源变压器内阻R0满足以下关系()。
  • A.
    (来学网)RL=R22m+R0
  • B.
    (来学网)RL=R22m-R0
  • C.
    (来学网)RL≤R22m+R0
  • D.
    (来学网)RL≤R22m-R0
  • E.
    (来学网)RL>R22m+R0