(来学网)等效边长的算法正确的是
  • A.
    (来学网)S=2AB/(A+B)
  • B.
    (来学网)S=(A+B)/AB
  • C.
    (来学网)S=AB/2(A+B)
  • D.
    (来学网)S=AB/(A+B)
  • E.
    (来学网)S=2(A+B)/AB