不到几天,在稻田里,蛾下的子变成的肉虫到处都是了。夜深人静的时候,稻草人听到他们咬嚼稻叶的声音,也看见他们越吃越馋的嘴脸。渐渐地浓绿的稻田全不见了,只剩下了光杆。他痛心,不忍再看,想到主人今年的辛苦只能换来眼泪和叹气,禁不住低头哭了。
我的预测是同类型试题
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