(来学网)飞行区指标为4F,跑道宽度为60m,道肩宽度为7.5m,则跑道端安全区宽度至少应为()
  • A.
    (来学网)60
  • B.
    (来学网)75
  • C.
    (来学网)120
  • D.
    (来学网)150