1.图中四条山脉中,不属于我国地势三级阶梯分界线的是( )
A.太行山 | B.天山 |
C.昆仑山 | D.大兴安岭 |
A.①区降水少,②区降水多 |
B.③区为盆地,④区为高原 |
C.⑤区地势高,⑥区地势低 |
D.⑦区是重要粮食产区,⑧区是重要畜牧业区 |
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