试题详情

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。(  )

A20~30m;10~15m

B20~30m;5~10m

C30~50m;10~15m

D30~50m;5~10m