单项选择题
A.分车带 B.街道内两侧 C.人行道 D.行车道
A.0.1%≤i≤1% B.0.3%≤i≤3% C.0.4%≤i≤4% D.0.5%≤i≤5%
A.做成连续纵坡 B.在底部每隔3～5m设防滑横墙 C.做成阶梯形 D.分段做成阶梯形