A. To the farm. B. To the supermarket. C. To the zoo.
A. Bird kites, panda kites and monster kites. B. Bird kites and dragon kites. C. Bird kites, panda kites and tiger kites.
A. They like tea. B. They like colas. C. They like apples.
A. The books are falling down the stairs. B. The apples are falling down the stairs. C. The pears are falling down the stairs.
A. He is sitting down. B. He is playing with toy cars. C. He is playing with a ball.
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