(来学网)正常步速时支撑相中期大约为步行周期的
  • A.
    (来学网)30%~40%
  • B.
    (来学网)35%~45%
  • C.
    (来学网)40%~45%
  • D.
    (来学网)50%~60%
  • E.
    (来学网)38%~40%