图为土壤剖面构造图,读图完成下面小题。
1.由于溶解于水的矿物质随水的下渗向下运移,矿物质淋失、颜色较浅的层是( )
A.① | B.② | C.③ | D.④ |
A.风化较弱,有机质来源少 | B.水分较多,淋溶作用较强 |
C.植被稀疏,枯枝落叶较少 | D.气温较高,微生物活动弱 |
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