搜索
| make colourful kites favourite classmates seasons rainy pick swimming snows |
| Dear Mike, I’m happy you are coming to China next year. Now let me tell you something about the Spring is a nice season. It’s often In summer, it’s always sunny and hot. I like eating ice creams. It’s my It’s windy and cool in autumn. The leaves fall on the road. Fruit becomes ripe (成熟的). And we can It’s usually cold in winter. Sometimes it I love all the seasons. But spring is my favourite season. It’s the best time to come here. Yours, Jack |
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
