( ) (1) A. Yes there is. B. Yes, it is. C. No, it isn’t.
( ) (2) A. I have five. B. There are five. C. I can see five.
( ) (3) A.It’s my skirt. B. She’s Yang Ling. C. It’s Liu Yun.
( ) (4) A. Yes, there is. B.Yes, there are. C. Yes, they are.
( ) (5) A. It’s on the first floor. B. They’re on the sofa. C. It’s new.
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