A.鋼筋混凝土橋 B.圬工橋 C.中承式橋 D.連續(xù)梁橋
A.經(jīng)濟(jì)跨徑 B.通航凈寬 C.2倍經(jīng)濟(jì)跨徑 D.2倍通航凈寬
A.2% B.3% C.4% D.5%