A.高差不足0.30m兩級(jí)踏步時(shí),其坡度不宜應(yīng)大于1:10
B.高差不足0.30m兩級(jí)踏步時(shí),其坡度不應(yīng)宜大于1:8
C.高差不足0.40m三級(jí)踏步時(shí),其坡度不應(yīng)宜大于1:10
D.高差不足0.40m三級(jí)踏步時(shí),其坡度不應(yīng)宜大于1:8
A.工業(yè)生產(chǎn)
B.居住生活
C.交通運(yùn)輸
D.農(nóng)田水利
A.1.20m
B.1.10m
C.1.05m
D.0.90m