农业谚语“天有棉花云,不久雷雨鸣”,说的是常在夏天晴空中,好似破碎棉絮的絮状高积云。读絮状高积云示意图,据此完成下面小题。
1.絮状高积云位于大气的( )
A.高层大气 | B.平流层 | C.对流层 | D.中间层 |
A.提高飞行速度穿越雷雨区 | B.降低飞行速度和飞行高度 |
C.绕飞并提高飞行高度 | D.保持高度并盘旋飞行 |
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