阅读海南岛局部等高线及主要河流分布图(下图),完成下面小题。
1.图中①②③④四地位于山谷的有( )
A.①② | B.②③ | C.①④ | D.②④ |
A.①②③ | B.②③④ | C.①③④ | D.①②④ |
A.东海、台湾海峡、南海 | B.黄海、台湾海峡、东海 |
C.渤海、东海、南海 | D.东海、黄海、南海 |
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