( ) (1) A. He’s David. B. She’s Helen. C. I’m Ben.
( ) (2) A. Yes, they are. B. Yes, they do. C. Yes, I am.
( ) (3) A. He’s one. B. She’s 40. C. He’s 40.
( ) (4) A. The one in a red skirt. B. The one in a black shirt. C. He’s my brother.
( ) (5) A. Yes, I do. B. Yes, she is. C. Yes, I can.
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