搜索
It’s spring now. The trees are green. The grass is green. The flowers are beautiful. They’re red, blue, pink, yellow… Look, the Greens (格林一家) are in the park. They’re flying kites. The kites are nice. Some are red, some are colourful. They are happy now. They’re sitting in a car. They want to go home.
1．It’s winter now.2．The flowers aren’t beautiful.
3．The Greens are flying kites.
4．The kites are nice.
5．The Greens have a car.
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
