收下来的葡萄有的运到城市去,有的运到晾房里制成葡萄干。晾房修在山坡上,样子有点像碉堡。晾房的四壁留着许多小孔,钉着许多木架子。人们把成串的葡萄挂在架子上,利用流动的空气,使水分蒸发,晾成葡萄干。葡萄沟生产的葡萄干颜色鲜,味道甜,非常有名。这段话主要是写
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