橋臺排水應(yīng)在臺后隔水層做成()的坡,向路堤兩側(cè)排水。
A.5% B.8% C.109/6 D.15%
A.3m B.2.5m C.2m D.1.5m
A.1~2cm B.2~3cm C.3~4cm D.4~5cm