(来学网)隧道进出口两侧______范围内,宜栽植高大乔木;桥头或涵洞两头______范围内,不宜栽植乔木。()
  • A.
    (来学网)20~30m;10~15m
  • B.
    (来学网)20~30m;5~10m
  • C.
    (来学网)30~50m;10~15m
  • D.
    (来学网)30~50m;5~10m