單項(xiàng)選擇題
巷道掘進(jìn)進(jìn)入探水線后應(yīng)堅(jiān)持"有掘必探,先探后掘"的施工原則。()
巷道掘進(jìn)進(jìn)入探水線后應(yīng)堅(jiān)持"有掘必探,先探后掘"的施工原則。()
A、正確
B、錯(cuò)誤
巷道掘進(jìn)進(jìn)入探水線后應(yīng)堅(jiān)持"有掘必探,先探后掘"的施工原則。()
巷道掘進(jìn)進(jìn)入探水線后應(yīng)堅(jiān)持"有掘必探,先探后掘"的施工原則。()
A、正確
B、錯(cuò)誤