A.多年生草本群落在争夺阳光和空间方面比一年生草本群落更有优势 |
B.与草本群落相比,灌木群落的垂直结构更加复杂 |
C.多年生亚灌木群落里有草本和亚灌木,其自我调节能力比多年生灌木群落更强 |
D.该沙地主要植被是多年生灌木,与其根系发达,抗风和吸水能力较强有关 |
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