父亲朝wù méng méng的树林望了又望,用bí zi 闻了又闻,说:“树林里过夜的鸟zǒng shì一群。黎明时,所有的鸟都dǒu dòng着羽毛,要抖净lù shuǐ和shī qì,舒畅地hū xī。但是,黎明时的鸟chì bǎng潮湿,飞起来沉重,最容易被猎人打中。”
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