There are four seasons in a year. They are spring, summer, autumn and winter. In spring, it's warm and rainy. There are new leaves and flowers. I take off my winter clothes. I put on my sweater and trousers. In summer, it's hot and sunny. I put on my shorts and T-shirt. I like to eat ice cream in summer. In autumn, it's cool and windy. I put on my sweater and trousers again. I like to eat fruits in autumn. In winter, it's cold and snowy. There is ice and snow. I put on my hat, scarf and winter coat. Every season is beautiful. I love all the seasons.
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