[交通] 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。( )
20~30m;10~15m
20~30m;5~10m
30~50m;10~15m
30~50m;5~10m
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