1.关于图中的地理事物的名称,正确的是( )
A.①山脉—巴颜喀拉山脉 |
B.②城市—重庆 |
C.③水利枢纽—三门峡 |
D.④河流—湘江 |
A.甲处流速较慢 |
B.乙处流量较小 |
C.甲处水能蕴藏量较丰富 |
D.乙处有结冰期 |
A.京沪线 | B.京九线 | C.京广线 | D.成昆线 |
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