A.0.1%≤i≤1% B.0.3%≤i≤3% C.0.4%≤i≤4% D.0.5%≤i≤5%
A.做成連續(xù)縱坡 B.在底部每隔3-5m設(shè)防滑橫墻 C.做成階梯形 D.分段做成階梯形
A.重力式橋臺 B.輕型橋臺 C.埋置式橋臺 D.框架式橋臺