某学校附近马路封闭改造施工,开通后同学们发现该路段路牙石上增加了许多拱形缺口,大雨时马路路面也不再经常积水。下图为改造后的公路景观图。据此完成下面小题。
A.路面积水排泄 | B.花坛更换花卉 | C.行道树的灌溉 | D.改善道路外观 |
A.路面硬化中推广渗水砖 | B.缩小地下排水管道口径 |
C.湖泊底部铺设塑料薄膜 | D.建设数量众多摩天大楼 |

同类型试题

y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2


y = sin x, x∈R, y∈[–1,1],周期为2π,函数图像以 x = (π/2) + kπ 为对称轴
y = arcsin x, x∈[–1,1], y∈[–π/2,π/2]
sin x = 0 ←→ arcsin x = 0
sin x = 1/2 ←→ arcsin x = π/6
sin x = √2/2 ←→ arcsin x = π/4
sin x = 1 ←→ arcsin x = π/2

