A. He is eating. B. He is playing hide-and-seek. C. He is wearing a hat.
A. Because she's going to dance. B. Because she's going to the theatre. C. Because she's going to have a party.
A. He played baseball with his friends. B. He played basketball with his friends. C. He played football with his friends.
A. He is going to swim. B. He is going to play baseball. C. He is going to play basketball.
A. It's behind Daming. B. It's behind Lingling. C. It's under the tree.
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