八达岭长城横亘于延庆军都山关沟古道的北口,这里是北京最早能看到红叶的景区。市内苍绿依然,这里已呈现“层林尽染映长城”的景观,10月中旬即进入红叶观赏黄金期。据此完成下面小题。
1.八达岭成为北京最早能看到红叶的景区,主要原因是( )A.海拔高,气温较低 | B.纬度高,气温较低 |
C.海拔低,气温较高 | D.纬度低,气温较高 |
A. | B. |
C. | D. |
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